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Root-knot nematodes (RKNs), Meloidogyne spp., are globally important plant-parasitic nematodes with a very broad host range including cucumber. In this research, we evaluated the nematicidal efficacy of commercial Abamectin-CAP (Vertimec 1.8% EC) versus Iranian-produced Abamectin-IAP (Vertimec 2% EC) compared with Cadusafos (Rugby), Trichodermaharzianum T-22 (Tricuran-P), and chicken manure against the cucumber RKN, Meloidogynejavanica, in commercial greenhouses. We also analyzed the effect of the products and amendment on several soil enzymes because of their significant roles in increasing the rate of decomposition and release of plant available nutrients. The results showed highly significant differences among treatments. The highest reduction of second-stage juveniles (J2) in the soil was recorded for Abamectin-CAP and Abamectin-IAP (93–95%), followed by Tricuran-P (90%), Rugby (82%) and chicken manure (65%). Similar results were obtained for the number of J2 and eggs in the root (94%), root gall indexes (94%), egg mass indexes (74–79%), and reproduction percentage (5.4–8.3%) in the Abamectin-CAP and Abamectin-IAP treatments. Enzyme activity assays showed that Rugby and chicken manure both caused a significant decrease in urease activity, followed by Abamectin-CAP and Abamectin-IAP. The highest alkaline phosphatase activity was observed for Abamectin-IAP and Abamectin-CAP, whereas the highest acidic phosphatase activity was in the Abamectin-CAP treatment. The results form a basis for developing integrated pest management strategies for RKN in cucumber. [ABSTRACT FROM AUTHOR]

A highly efficient method for the detection and quantification of 55 veterinary antibiotics (VAs) in chicken manure belonging to six drug classes using solid-phase extraction (SPE) and ultrahigh-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) was developed. The mixture of EDTA–McIlvaine buffer (pH 3.0) and the organic extractant (methanol–acetonitrile, 1:3, v/v) was used to isolate the target VAs from freeze-dried chicken manure. The extract was purified by a hydrophile–lipophile balance cartridge. All antibiotics showed excellent linear relationships in the range between 1 and 100 µg/kg with the coefficients of determination of the standard curves above 0.990. The recoveries of antibiotics were between 35.66% and 103.54% using matrix-matched calibration for quantification. The limits of detection and quantification were from 0.01 to 1.59 µg/kg and 0.04 to 4.76 µg/kg, respectively. The method was demployed to determine VAs in chicken manure from 12 farms, revealing contamination in all samples. A total of 13 VAs belonging to six classes were detected with concentrations up to 41.47 mg/kg. The presence of high concentrations of antibiotic residues in poultry manure poses a potential risk for environmental contamination. This work has identified significant differences in the types of VAs compared to literature reports. Additionally, it detected pleuromutilin antibiotics in chicken manure for the first time. [ABSTRACT FROM AUTHOR]

Soil degradation and limited access to chemical fertilizers partly explain the persistently low crop yields in Sub-Saharan Africa. To provide local farmers with alternative fertilizer options, this study examined the impact of locally sourced fertilizers on sorghum productivity and soil health. Treatments were set up in a completely randomized block design with five replications each. These treatments included Burkina phosphate rock (BPR), calcined BPR (Cal-BPR), triple super phosphate (TSP), four types of phosphocomposts, and an unfertilized phosphate control (Control). The phospho-composts, prepared during 4 months in advance, were as follows: Comp-1 (sorghum straw + BPR + sorghum rhizosphere soil and roots), Comp-2 (sorghum straw + Cal-BPR + sorghum rhizosphere soil and roots), Comp-3 (sorghum straw + BPR + chicken manure), and Comp-4 (sorghum straw + Cal-BPR + chicken manure). They were applied at a rate of 2.5 t ha−1 at sowing, alongside BPR, Cal-BPR, and TSP that provided 23 kg P2O5 ha−1. Urea and potassium chloride were added 15 days after sowing (DAS) to all treatments to standardize nitrogen and potassium levels to 37 kg N ha−1 and 14 kg K2O ha−1. Soil properties were evaluated using the samples collected at 42, 70, and 120 DAS. Rhizosphere soil showed higher bacterial and fungal abundance than bulk soil, particularly in compost treatments. Comp-4 notably improved soil properties, including increased phosphorus-cycling microbial genes, available phosphorus, cation exchange capacity, and pH, and it produced the highest sorghum grain yield. However, Comp-3 offered superior economic benefits, with higher net returns from grain sales. Overall, phosphocomposts improve soil health and boost sorghum yield in Sub-Saharan Africa. Calcined BPR-chicken manure-enriched compost may be used to increase crop yields. However, the study shows that BPR-chicken manure-enriched compost provides a more cost-effective solution for soil revitalization and sustainable food production in infertile soils in the region. [ABSTRACT FROM AUTHOR]

The demand for food is increasing and the use of soil organic amendments in agricultural management practices has been instructed to increase crop yield and reduce dependence on synthetic inorganic fertilizers at low cost to limited resource farmers. However, the effect of organic amendments on the quality and nutritional composition of edible plants has received little attention. Locally available organic amendments (sewage sludge SS, chicken manure CM, cow manure Cow, vermicompost Vermi, and biochar Bio) were chosen to test their impact on field-grown sweet potato, Ipomoea batatas L. yield, root quality, and root nutritional composition. The results indicated that utilizing Cow manure in growing sweet potatoes significantly promoted root yield and root nutritional composition. Cow treatment produced the greatest number of roots compared to Bio, CM, SS, and the control treatments. The results also revealed that the concentrations of vitamin C (260. 3 µg g−1), β-carotene (45.4 µg g−1), soluble sugars (16.7 mg g−1), and total phenols (196.3 3 µg g−1 fresh roots) were greater in the roots of plants grown in Cow compared to the roots of the control treatment. The results indicated the low impact of biochar whereas Cow is recommended for enhancing sweet potato yield and nutritional composition. [ABSTRACT FROM AUTHOR]

Faced with the dual challenges of energy shortage and environmental pollution, researchers are turning to extracting clean energy from waste resources. The coupled system of solar energy and supercritical water gasification offers a novel solution to these issues. In this study, a solar-driven supercritical water gasification-oxidation system for ammonia production and heat supply from chicken manure was simulated. Additionally, the effects of temperature of supercritical water gasification, chicken manure slurry concentration, water-dry matter ratio, and pressure of supercritical water gasification and oxidation on the system's products, efficiency, and device exergy losses were examined. Under typical working conditions (the temperature of supercritical water gasification: 750 °C, chicken manure slurry concentration: 50 wt%, water-dry matter ratio: 5, the pressure of supercritical water gasification and oxidation: 25 MPa), and the system had a treatment capacity of 5 t/h of dry chicken manure. The system yielded 2604.04 kg/h of NH 3 and 23763.9 kg/h of heating steam. It demonstrated an energy efficiency of 68.38% and an exergy efficiency of 46.85%. The total exergy losses of the system amounted to 34704.73kw, with the solar collector accounting for the largest share at 49.6%. The temperature of supercritical water gasification and water-dry matter ratio significantly impacted the system efficiency. Conversely, chicken manure slurry concentration and the pressure of supercritical water gasification and oxidation exerted minimal influence. The solar collector and gasification reactor emerged as the primary contributors to exergy losses in the entire system. Notably, the lower temperatures of supercritical water gasification, chicken manure slurry concentrations, pressures of supercritical water gasification and oxidation, and water-dry matter ratios can reduce exergy losses in both the solar collector and the gasification reactor. [Display omitted] • The supercritical water gasification and ammonia synthesis system were simulated. • The performance of system was analyzed by means of thermodynamic analysis. • The influence of operating parameters on the system is analyzed. • The energy efficiency and exergy efficiency reached 68.38% and 46.85% respectively. [ABSTRACT FROM AUTHOR]

Agricultural soils that are close to industrial areas are prone to be polluted by lead (Pb) and cadmium (Cd) caused by industrial waste. Soil remediation is a method to clean the soil from pollutant materials. Utilizing fly ash and organic matter is a way to reduce levels of Pb and Cd pollution in the soil. This research was conducted to study the effect of ameliorants on reducing the availability of Pb and Cd in soil. The greenhouse experiment was carried out using a randomized block design with the application of 3 types of ameliorants, namely fly ash, chicken manure, and cow manure. The experimental design was prepared with 2 dose levels, namely C: control; F1: 450g; F2: 600g; A1: 75g; A2: 105g; S1: 105g; S2: 135g; FAS1: 450 g+75 g+105 g; FAS2: 600g+105g+135g. Each treatment was repeated 3 times to obtain 27 experimental units. The experimental results showed that the effect of the treatment of fly ash, chicken manure, and cow manure significantly increased soil pH, KB, C-organic, and exchangeable bases as well as reduced levels of availability of Pb and Cd compared to controls. The use of single fly ash (F1 and F2) reduces the availability of Pb in the soil, while the available Cd decreased in the application of a combination of fly ash with chicken and cow manure (FAS1 and FAS2). The application of fly ash alone was able to reduce the availability of Pb and Cd which was higher than of chicken manure and cow manure alone. However, the provision of fly ash has not been able to increase the growth of kale plants. [ABSTRACT FROM AUTHOR]

Turmeric (Curcuma domestica Val) is one of the agricultural commodities being developed by the Jambi Province of Indonesia. However, despite the high value of turmeric, its productivity in Jambi Province is low. This is because the crop is mostly cultivated in marginal lands dominated by Inceptisol, which has low fertility and low water availability. Organic mulch and chicken manure have the potential to be used to improve soil water availability and crop yield. This research aimed to evaluate the effect of organic mulch cover and chicken manure on soil water availability and turmeric yield. The treatments tested were combinations of various percentages of organic mulch cover (30%, 60%, and 90%, and chicken manure dosage (0, 5, 10, and 15 t ha-1). The twelve treatment combinations were arranged in a randomized block design with three replications. The results showed that the combination of the percentage of organic mulch cover and chicken manure dosage affected soil organic matter content, soil bulk density, soil pore size distribution, soil water availability, and turmeric yield. The application of 30% cover of organic mulch and 10 t ha-1 of chicken manure was found to be the best combination to improve soil available water and turmeric yield. The regression analysis results showed that soil bulk density, organic carbon, fast-drainage pores, and slow-drainage pores simultaneously affected the soil water content, with an R2 value of 0.85. The results of this study proved that soil available water is also closely correlated with turmeric yield. [ABSTRACT FROM AUTHOR]

One of the procedures that helps remove pharmaceuticals (Phs) from wastewater in Constructed Wetlands (CWs) is phytoremediation. Using Ruellia simplex, the main emphasis of this study is on the function of plants and substrates in the removal mechanism independently from aqueous solution. Even in an aqueous solution containing high concentrations of antibiotics, the plant could thrive, and lighting further promoted growth. For the removal of amoxicillin (AMX) and ciprofloxacin (CIP) at a concentration of 25 mg/L, six reactors are used: hydroponic planted reactors, sand rectors, chicken manure -- wood shavings (CM-WS) rectors, rhizobacterial-inoculated unplanted reactors, unplanted control reactors, and unplanted dark control reactors to study the roles of phytoremediation, adsorption, biodegradation, photodegradation and hydrolysis process in reduction of AMX and CIP. Additionally, the plant's weight is determined for each sample collected and compared to the initial weight of the experiment to monitor plant growth. The possible fates of AMX and CIP were explored using hydroponic tests, whereby 43%, 26% and 19%, respectively, of the total removal of AMX had been accounted for by plant uptake, adsorption by CM-WS and biodegradation after 21 days of exposure, also these process contributed well in CIP removal, where the proportions were 39%, 32% and 18%, respectively of the total CIP reduction at the same intervals. [ABSTRACT FROM AUTHOR]

The need for energy resources is continuously increasing worldwide and raises the need for environmentally benign, low-cost processes for energy generation. Membraneless microbial fuel cell (ML-MFC) has emerged as a promising solution for electricity production. MFCs are bioelectrical devices that harness the metabolism of electrogenic bacteria (EB) for generation of electrical energy. In the present investigation, Bacillus subtilis (BS) and Pseudomonas aeruginosa (PA) were utilized to catalyze transformation of carbon sources in chicken manure as source of renewable energy. The study was carried out by setting the experimental conditions with the ambient temperature (34°C ± 1°C) pH (12), electrode distance (3 cm), initial moisture amount (57% vol/wt) set as constant. Results highlighted BS and PA performance in an ML-MFC system for 7 to 14 days incubation periods. The specific growth recorded 0.0262 g(Lh−1) BS strain and 0.0141 g(Lh−1) PA strain for 7 days and the specific growth 0.0057 g(Lh−1) BS strain and 0.00163 g(Lh−1) PA strain was recorded after 14 days incubation. ML-MFCs were conducted for 14 days incubation period and significant effect of growth of BS and PA were reflected on voltage and power production. Maximum voltage (BS, 0.06 V; PA, 0.043 V) and power density (BS, 391 mW/m2; PA, 591 mW/m2) were recorded after 14 days of incubation. A series of ML-MFC contributed a promising performance for BS, which was 0.05 V and 9.05 mW/m2, compared with PA, which was 0.022 V and 9.05 mW/m2. Moreover, reduction in macronutrients and micronutrients was analyzed through inductively coupled plasma-optical emission spectroscopy (ICP-OES), chemical oxygen demand (COD) removal, and Fourier-transform infrared spectroscopy (FTIR) analysis. Thus, analysis on scanning electron microscope (SEM) and FTIR bands showed that these two strains are compatible for biofilm formation and degradation of the chicken manure into simple bands. The study concluded that BS showed better performance in terms of EB growth (21.7%; 14 days), COD removal (2.1%; 14 days), and power density generation (54.7%; 14 days) as compared with the PA strain. [ABSTRACT FROM AUTHOR]

Sorghum is a plant that mainly requires chemical nitrogen fertilization. There are organic fertilizers that can provide nutrients to plants with great benefits to the soil, such as chicken manure. To determine the influence of organic fertilization on nitrate reductase (NR), glutamine synthetase (GS), and the amount of chlorophyll, sorghum plants were grown using the following four treatments: soil (T1), soil + chicken manure 100 kg ha−1 of nitrogen (N) (T2), soil + chicken manure 200 kg ha−1 N (T3), and soil + ammonium sulfate 100 kg ha−1 N (T4). Leaves were sampled in the vegetative stage (VS), the reproductive stage (RS), and the maturation stage (MS). The highest NR activity occurred in plants with T2 and T3 in the VS. The highest GS activity was in T3 and T4 in the RS. The amount of chlorophyll a was the same in all phenological stages. However, the amount of chlorophyll b was influenced by the type of fertilization at different phenological stages. Organic fertilizers (OF) produced the highest NR activity. On the other hand, GS activity was higher with chemical fertilization (T4), which was equal to the second dose of organic fertilization (T3). Finally, chlorophyll a and b were influenced by both types of fertilization, and was different from T1.

Manure application is the primary input route for antibiotic resistance genes (ARGs) in farmland soil. This study investigated the effects of varying the rates of five chicken manure applications on the accumulation and distribution of ARGs across different soil depths (0–20, 20–40, and 40–60 cm) using metagenomic sequencing. The results revealed that the distribution of ARGs in farmland soil was closely linked to soil depth and influenced to some extent by the fertilizer quantity after 30 days of fertilization. ARGs were predominantly concentrated in the surface soil and exhibited a significant decrease in type and abundance with an increased soil depth. Compared with soil treated with chemical fertilizers alone, chicken manure-treated surface soil presented a higher diversity and abundance of ARGs. However, the diversity and abundance of ARGs did not increase proportionally with the increasing ratios of chicken manure application (0, 25, 50, 75, and 100%). ARGs in soil primarily conferred resistance to host bacteria through antibiotic efflux pumps (~33%), antibiotic target alteration (~31%), antibiotic inactivation (~20%), and antibiotic target protection (~8%). Correlation analysis involving ARGs and soil microorganisms revealed widespread multidrug resistance among soil microorganisms. Furthermore, two genera of human pathogenic bacteria (Pseudomonas sp. and Listeria sp.) were identified as potential microbial hosts of ARGs in all treatments. Correlation analysis involving ARGs and environmental factors indicated that soil ARGs are predominantly influenced by heavy metals and microorganisms. This paper offers valuable insights for environmental risk assessments regarding the utilization of livestock manure resources. Additionally, it furnishes a scientific foundation for farmland application strategies pertaining to livestock manure. [ABSTRACT FROM AUTHOR]

Sorghum is a plant that mainly requires chemical nitrogen fertilization. There are organic fertilizers that can provide nutrients to plants with great benefits to the soil, such as chicken manure. To determine the influence of organic fertilization on nitrate reductase (NR), glutamine synthetase (GS), and the amount of chlorophyll, sorghum plants were grown using the following four treatments: soil (T1), soil + chicken manure 100 kg ha−1 of nitrogen (N) (T2), soil + chicken manure 200 kg ha−1 N (T3), and soil + ammonium sulfate 100 kg ha−1 N (T4). Leaves were sampled in the vegetative stage (VS), the reproductive stage (RS), and the maturation stage (MS). The highest NR activity occurred in plants with T2 and T3 in the VS. The highest GS activity was in T3 and T4 in the RS. The amount of chlorophyll a was the same in all phenological stages. However, the amount of chlorophyll b was influenced by the type of fertilization at different phenological stages. Organic fertilizers (OF) produced the highest NR activity. On the other hand, GS activity was higher with chemical fertilization (T4), which was equal to the second dose of organic fertilization (T3). Finally, chlorophyll a and b were influenced by both types of fertilization, and was different from T1. [ABSTRACT FROM AUTHOR]

In order to resolve the controversial questions of the heavy metal pollution that chicken manure composting was used in kiwifruit production, the contents of heavy metal such as copper (Cu) and zinc (Zn) and nutrients such as nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), manganese (Mn) on the soils of kiwi orchards with and without chicken manure composting were discussed, in order to provide a theoretical basis for the scientific reuse of chicken manure. The heavy metal Cu and Zn content increased significantly after the application of chicken manure composting, but it was far below the heavy metal pollution standard and did not cause heavy metal pollution in the soil. The chicken manure composting affect remarkably contents of soil nutrients, which the macro elements P and K contents were significantly increased by the application of chicken manure composting but the N content was significantly decreased, the medium elements Ca and Mg contents were significantly increased, the micro elements Mn contents were significantly increased but B contents were no clear difference. Our results indicated that chicken manure composting can provide sufficient nutrients for the soil, while application of fully fermented chicken manure will not cause heavy metal pollution in soil, and nitrogen fertilizer should be properly applied at the same time to ensure nutrient balance. [ABSTRACT FROM AUTHOR]

Ammonium inhibition is a key limiting factor for anaerobic digestion when using chicken manure as the main substrate, especially in a digestion system with biogas slurry reflux. Air stripping is usually used as a recycled biogas slurry treatment. In this study, we carried out the anaerobic co-digestion of chicken manure and corn straw. The fermentation performance was investigated with and without air stripping at different biogas slurry reflux ratios and with an increasing organic loading rate. The results show that air stripping enhanced biogas production, system stability, and volatile solid removal efficiency via the mitigation control of ammonium inhibition. The total ammonium nitrogen in the digesters with air stripping was 20.24–46.40% lower than in those without air stripping. The highest specific biogas production and volatile solid removal efficiency values were obtained in the digesters at an organic loading rate of 3.3 g volatile solid (VS)/(L·d) and a reflux ratio of 75% with air stripping, reaching 480.43 mL/gVSadd and 63.36%, respectively. Moreover, air stripping also improved the organic loading rate and reflux ratio. Stable operation was achieved at an organic loading rate of 5.3 gVS/(L·d) and a reflux ratio of 75%, with specific biogas production of 392.35 mL/gVSadd and a volatile solid removal efficiency of 50.33%. The fermentation performance deteriorated when the organic loading rate was increased to 8.0 gVS/(L·d) at a reflux ratio of 75%, even when air stripping was conducted, indicating that a slighter lower reflux ratio (50%) could be more feasible at a higher organic loading rate (8.0 gVS/(L·d). Additionally, the methanogen community structure varied according to the use of air stripping, with a shift in the methanogenic pathway from hydrogenotrophic to acetoclastic methanogens. Overall, our findings support the adoption of air stripping for ammonium mitigation in anaerobic digestion with biogas slurry reflux. [ABSTRACT FROM AUTHOR]

The study describes the whole-genome sequencing of two antibiotic-resistant representative Escherichia coli strains, isolated from poultry manure in 2020. The samples were obtained from a commercial chicken meat production facility in Poland. The antibiotic resistance profile was characterized by co-resistance to β-lactam antibiotics, aminoglycosides, and fluoroquinolones. The three identified resistance plasmids (R-plasmids), pECmdr13.2, pECmdr13.3, and pECmdr14.1, harbored various genes conferring resistance to tetracyclines (tetR[A]) for, aminoglycoside (aph, aac, and aad families), β-lactam (blaCMY-2, blaTEM-176), sulfonamide (sul1, sul2), fluoroquinolone (qnrS1), and phenicol (floR). These plasmids, which have not been previously reported in Poland, were found to carry IS26 insertion elements, the intI1-integrase gene, and conjugal transfer genes, facilitating horizontal gene transfer. Plasmids pECmdr13.2 and pECmdr14.1 also possessed a mercury resistance gene operon related to transposon Tn6196; this promotes plasmid persistence even without antibiotic selection pressure due to co-selection mechanisms such as co-resistance. The chicken manure–derived plasmids belonged to the IncX1 (narrow host range) and IncC (broad host range) incompatibility groups. Similar plasmids have been identified in various environments, clinical isolates, and farm animals, including cattle, swine, and poultry. This study holds significant importance for the One Health approach, as it highlights the potential for antibiotic-resistant bacteria from livestock and food sources, particularly E. coli, to transfer through the food chain to humans and vice versa. [ABSTRACT FROM AUTHOR]

The research was carried out at the Colonche Support Center - UPSE of the Peninsula de Santa Elena State University, at the Agrostological Station, located in the Manglaralto parish, Santa Elena province at 12 meters above sea level, the topography is flat with a slope of less than 1% and regarding climatic conditions, an average rainfall of 100 -200 mm / year is presented, with an average annual temperature of 20 to 30 °C, 12 hours of sunlight and average relative humidity of 83,42 %. The study was carried out in order to evaluate the percentage of Arachis pintoi take hold in different organic substrates of animal origin, rooted Arachis pintoi seedlings were used, where a completely random design was implemented consisting of three treatments, T1; 100 % soil, T2; 75 % soil + 25 % pig manure, T3; 75 % soil + 25 % chicken manure, with four repetitions the data obtained for each variable were statistically analyzed in the statistical program IBM SPSS Statistics ver. 22, performing the analysis of variance and comparing the means of the treatments with the Tukey test. The variables established for the study were the percentage of take-up at 15 days after sowing, number of leaves, stolons and plant height (cm) at 15 and 30 days. Regarding the main results, T3 obtained the most efficient values with an average of 16,60 for the number of leaves, for the number of stolons with an average of 6,85; these results were obtained at 30 days, in the height of the plant T3 was the one that stood out the most within the treatments with an average of 8,45 cm at 30 days, followed by T0. The results obtained showed that T3 containing 25 % chicken manure was the one that presented the best percentage of take, as well as in the variables of number of leaves, stolons and plant height. [ABSTRACT FROM AUTHOR]

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IntroductionAerobic composting is an effective method for utilizing chicken manure. However, its low carbon to nitrogen (C/N) ratio leads to slow heating and short high-temperature phases, which reduce composting efficiency and product quality.MethodsTo address this issue, splinted mushroom cultivation residues were added to adjust the C/N ratio, and exogenous thermophilic composting strains were introduced to increase composting temperature. This study analyzed the relationship between physicochemical metabolites and microbial community structure during high-temperature chicken manure composting.Results and discussionBased on metagenomic and physicochemical analyses, results showed that the exogenous microbial agents extended the thermophilic phase by three-times, reduced the heating phase duration by 75%, and increased nitrogen, phosphorus, potassium, and soluble organic carbon contents by 3.61, 21.63, 7.21, and 39.03%, respectively. Genes associated with amino acid metabolism were significantly enriched during the heating phase, while genes involved in the tricarboxylic acid cycle were more active in the thermophilic phase. During the thermophilic phase, bacterial diversity and richness decreased compared to the heating and cooling phases. Functional microbes such as Bacillus, Caldicoprobacter, and Virgibacillus showed a positive correlation with the key differential metabolites. While Actinomadura, Saccharomonospora, Paenibacillus, and Aneurinibacillus displayed an opposite correlation. Further experiments demonstrated that the increased temperature during the thermophilic phase triggered the upregulation of oleic acid metabolism and piperidine metabolism pathways in functional microorganisms, leading to the production of heat stabilizers and protective agents like oleic acid, gallic acid, and 2-piperidone. This phenomenon helped maintain microbial viability during the thermophilic phase and improved composting efficiency.

Soil degradation and limited access to chemical fertilizers partly explain the persistently low crop yields in Sub-Saharan Africa. To provide local farmers with alternative fertilizer options, this study examined the impact of locally sourced fertilizers on sorghum productivity and soil health. Treatments were set up in a completely randomized block design with five replications each. These treatments included Burkina phosphate rock (BPR), calcined BPR (Cal-BPR), triple super phosphate (TSP), four types of phosphocomposts, and an unfertilized phosphate control (Control). The phospho-composts, prepared during 4 months in advance, were as follows: Comp-1 (sorghum straw + BPR + sorghum rhizosphere soil and roots), Comp-2 (sorghum straw + Cal-BPR + sorghum rhizosphere soil and roots), Comp-3 (sorghum straw + BPR + chicken manure), and Comp-4 (sorghum straw + Cal-BPR + chicken manure). They were applied at a rate of 2.5 t ha−1 at sowing, alongside BPR, Cal-BPR, and TSP that provided 23 kg P2O5 ha−1. Urea and potassium chloride were added 15 days after sowing (DAS) to all treatments to standardize nitrogen and potassium levels to 37 kg N ha−1 and 14 kg K2O ha−1. Soil properties were evaluated using the samples collected at 42, 70, and 120 DAS. Rhizosphere soil showed higher bacterial and fungal abundance than bulk soil, particularly in compost treatments. Comp-4 notably improved soil properties, including increased phosphorus-cycling microbial genes, available phosphorus, cation exchange capacity, and pH, and it produced the highest sorghum grain yield. However, Comp-3 offered superior economic benefits, with higher net returns from grain sales. Overall, phosphocomposts improve soil health and boost sorghum yield in Sub-Saharan Africa. Calcined BPR-chicken manure-enriched compost may be used to increase crop yields. However, the study shows that BPR-chicken manure-enriched compost provides a more cost-effective solution for soil revitalization and sustainable food production in infertile soils in the region.

This study was conducted to investigate the effects of organic, NPK, and biofertilizers on the yield of two cowpea varieties grown under arid land conditions. Two cultivars of cowpea (Karim-7 and Dokki-331) were evaluated using different fertilizer types. The fertilizers examined were organic (farmyard manure (FYM) and chicken manure (CHM)) and biofertilizers (effective microorganisms (EM1) and technology of smart fertilizer (TS)) in addition to NPK treatments (NPK (50 kg/fed), NPK (100 kg/fed), EM1 (15 m3.fed-1) + NPK (50 kg/fed), TS (15 m3.fed-1) + NPK (50 kg/fed). A randomized complete block design (RCBD) with 16 treatments and three replications was used to set up the experiment. The measured yield parameters were seed number/plant, pod length, seed number/pod, pod number/plant, dry yield/plant, dry yield/m2, bio yield, pod weight, 100-seed weight, and grain yield. The results cleared that the cultivar dokki-331 under EM1 biofertilizer + NPK (50 kg/fed) combination treatment was the superior practice for increasing all studied traits.

Abstract Co-pyrolysis of chicken manure with tree bark was investigated to mitigate salinity and potentially toxic element (PTE) concentrations of chicken manure-derived biochar. The effect of tree bark addition (0, 25, 50, 75 and 100 wt%) on the biochar composition, surface functional groups, PTEs and polycyclic aromatic hydrocarbons (PAH) concentration in the biochar was evaluated. Biochar-induced toxicity was assessed using an in-house plant growth assay with Arabidopsis thaliana. This study shows that PTE concentrations can be controlled through co-pyrolysis. More than 50 wt% of tree bark must be added to chicken manure to reduce the concentrations below the European Biochar Certificate-AGRO (EBC-AGRO) threshold. However, the amount of PAH does not show a trend with tree bark addition. Furthermore, co-pyrolysis biochar promotes plant growth at different application concentrations, whereas pure application of 100 wt% tree bark or chicken manure biochar results in decreased growth compared to the reference. In addition, increased plant stress was observed for 100 wt% chicken manure biochar. These data indicate that co-pyrolysis of chicken manure and tree bark produces EBC-AGRO-compliant biochar with the potential to stimulate plant growth. Further studies need to assess the effect of these biochars in long-term growth experiments.

Co-pyrolysis of chicken manure with tree bark was investigated to mitigate salinity and potentially toxic element (PTE) concentrations of chicken manure-derived biochar. The effect of tree bark addition (0, 25, 50, 75 and 100 wt%) on the biochar composition, surface functional groups, PTEs and polycyclic aromatic hydrocarbons (PAH) concentration in the biochar was evaluated. Biochar-induced toxicity was assessed using an in-house plant growth assay with Arabidopsis thaliana. This study shows that PTE concentrations can be controlled through co-pyrolysis. More than 50 wt% of tree bark must be added to chicken manure to reduce the concentrations below the European Biochar Certificate-AGRO (EBC-AGRO) threshold. However, the amount of PAH does not show a trend with tree bark addition. Furthermore, co-pyrolysis biochar promotes plant growth at different application concentrations, whereas pure application of 100 wt% tree bark or chicken manure biochar results in decreased growth compared to the reference. In addition, increased plant stress was observed for 100 wt% chicken manure biochar. These data indicate that co-pyrolysis of chicken manure and tree bark produces EBC-AGRO-compliant biochar with the potential to stimulate plant growth. Further studies need to assess the effect of these biochars in long-term growth experiments. [ABSTRACT FROM AUTHOR]

Cosmos caudatus or Kenikir has several benefits such as antioxidant, antihypertensive and also antidiabetic effects. Part of Kenikir that is consumed is the leaves, to increase the production of Kenikir can be done by increasing its biomass. One alternative way to increase the biomass of Kenikir is through the utilization of PLTU waste in the form of coal fly ash as a mixture of planting media with soil and chicken manure. The study aimed to determine the optimal mix composition of planting media for Kenikir. Materials used in the research were polybags 25x25cm, local varieties of Kenikir seeds, chicken manure, planting media (soil), and coal fly ash with varying doses. The research was carried out from January - June 2022 at the Experimental Field, Faculty of Agriculture, University of Brawijaya using a Randomized Block Design. There were 10 combination treatments with 3 replications. Observational data were analyzed using analysis of variance (F test) at 5% with a further test of Honest Significant Difference (HSD) at 5%. The results showed that all treatments had a significant effect on all observation parameters. Most optimal treatment was a mixture of 75% soil + 25% coal fly ash + 15 t ha-1 chicken manure with the highest biomass yield of 58.9 g compared to control treatment (100% Soil), 45.2 g. Fly ash and chicken manure can be used as an alternative planting medium mixture to increase the biomass of Kenikir. [ABSTRACT FROM AUTHOR]

Leach bed reactors (LBRs) are dry anaerobic systems that can handle feedstocks with high solid content, like chicken manure, with minimal water addition. In this study, the chicken manure was mixed with zeolite, a novel addition, and packed in the LBR to improve biogas production. The resulting leachate was then processed in a continuous stirred tank reactor (CSTR), where most of the methane was produced. The supernatant of the CSTR was returned to the LBR. The batch mode operation of the LBR led to a varying methane production rate (MPR) with a peak in the beginning of each batch cycle when the leachate was rich in organic matter. Comparing the MPR in both systems, the peaks in the zeolite system were higher and more acute than in the control system, which was under stress, as indicated by the acetate accumulation at 2328 mg L−1. Moreover, the presence of zeolite in the LBR played a crucial role, increasing the overall methane yield from 0.142 (control experiment) to 0.171 NL CH4 per g of volatile solids of chicken manure entering the system at a solid retention time of 14 d. Zeolite also improved the stability of the system. The ammonia concentration increased gradually due to the little water entering the system and reached 3220 mg L−1 (control system) and 2730 mg L−1 (zeolite system) at the end of the experiment. It seems that zeolite favored the accumulation of the ammonia at a lower rate (14.0 mg L−1 d−1) compared to the control experiment (17.3 mg L−1 d−1). The microbial analysis of the CSTR fed on the leachate from the LBR amended with zeolite showed a higher relative abundance of Methanosaeta (83.6%) compared to the control experiment (69.1%). Both CSTRs established significantly different bacterial profiles from the inoculum after 120 days of operation (p < 0.05). Regarding the archaeal communities, there were no significant statistical differences between the CSTRs and the inoculum (p > 0.05). [ABSTRACT FROM AUTHOR]

This study was conducted to investigate the effects of organic, NPK and biofertilizers on the yield of two cowpea varieties grown under arid land conditions. Two cultivars of cowpea (Karim-7 and Dokki-331) were evaluated using different fertilizer types. The fertilizers examined were organic (farmyard manure (FYM) and chicken manure (CHM)) and biofertilizers (effective microorganisms (EM1) and technology of smart fertilizer (TS)) in addition to NPK treatments (NPK (50 kg/fed), NPK (100 kg/fed), EM1 (15 m³ .fed-1 ) + NPK (50 kg/fed), TS (15 m³ .fed-1 ) + NPK (50 kg/fed). A randomized complete block design (RCBD) with 16 treatments and three replications was used to set up the experiment. The measured yield parameters were seed number/plant, pod length, seed number/pod, pod number/plant, dry yield/plant, dry yield/m2, bio yield, pod weight, 100-seed weight, and grain yield. The results cleared that the cultivar dokki-331 under EM1 biofertilizer + NPK (50 kg/fed) combination treatment was the superior practice for increasing all studied traits. [ABSTRACT FROM AUTHOR]

This study conducted anaerobic co-digestion (AcoD) of chicken manure (CM) and corn straw (CS) with various mixing ratios (1:0, 9:1, 8:2, 7:3, 6:4, 5:5, and 4:6, VS) through batch experiments to investigate gas production performance, changes in biogas slurry fertilizer efficiency, and microbial community. The results indicate that, compared to anaerobic digestion (AD), AcoD promoted methane production and reduced the accumulation of toxic substances, such as ammonia nitrogen. Methane production was the highest when CM and CS were co-digested with a mixing ratio of 7:3 (R-7:3). The degradation rate of organic matter (OM) at R-7:3 was the highest, and both available nitrogen (AN) and available phosphorus (AP) concentrations were at appropriate levels. The concentration of available potassium (AK) increased the most during the digestion process. In addition, the concentrations of heavy metals (Cu, Zn, Cd, Pb, As) in the biogas slurry were below the detection limit. Microbial analysis reveals that Methanosarcina and Sedimentibacter were the primary bacteria responsible for methane production in the system. They are relatively abundant under R-7:3 conditions, which suggests a greater potential for the stability of the AcoD system. Therefore, an appropriate mixing ratio of CM to CS could enhance methane production and system stability, while reducing the risks associated with using biogas slurry in agriculture. [ABSTRACT FROM AUTHOR]

One of the organic fertilizers that has the potential to cultivate Chlorella sp. is the cow's rumen. To increase the nutrient content in the cow's rumen, the cow's rumen must be made into bokashi and enriched with chicken manure. This study aimed to determine the use of cow's rumen bokashi enriched with chicken manure at different doses on Chlorella sp cell density. The research design used was a Completely Randomized Design (CRD) with 5 treatments and 3 replications, namely P0 (2 g/L cow's rumen bokashi), P1 = 2 g/L cow's rumen bokashi enriched with 2.5 g/L chicken manure, P2 = 2 g/L cow's rumen bokashi enriched with 3.0 g/L chicken manure, P3 = 2 g/L cow's rumen bokashi enriched with 3.5 g/L chicken manure, and P4 = 2 g/L cow's rumen bokashi enriched with 4.0 g/L chicken manure. The results showed that the highest cell density of Chlorella sp. occurred in treatment P3 (i.e. 456.1 ± 15.1 × 104 cells/mL) and the highest specific growth rate occurred in treatment P0 (i.e. 0.20 ± 0.0/day). Nutrient levels in the culture medium are optimal for Chlorella sp., with nitrate ranging from 0.1375 to 0.2833 mg/L and phosphate ranging from 2.4889 to 2.8650 mg/L. From the results of this study, it can be concluded that the use of cow's rumen bokashi enriched with chicken manure had a very significant effect on cell density and specific growth rate of Chlorella sp. (P<0.01). [ABSTRACT FROM AUTHOR]

This study aimed to evaluate the effect of crude chicken manure and its processing on growth, biochemistry, quality, and risk assessment of Oreochromis niloticus, as this habit is used in several fish farms, without an adequate knowledge of its effect on fish quality. Four feeding regimes were applied, namely (1) crude chicken manure (CM), (2) processed chicken manure, (3) mixed diets [processed CM (45 days) + commercial fish diet (45 days)], and (4) commercial fish diet (control), for 90 days in glass aquaria. The fish fingerlings were acclimatized prior to the start of the experiment, followed by twice daily feeding and regular monitoring of water quality. The growth performance showed a positive trend from crude CM toward the processed CM as fish diets, leading to an increase in final weight and weight gain. The crude CM recorded the lowest final weight of 11.3g and weight gain of 10.2g, and the lowest survival percentage of 85.1%. Furthermore, mosthaematological parameters displayed the similar trend, except RBCs which showed insignificant changes. The immunological indicators such as WBCs showed anelevation starting from the dispersed diet (crude CM) toward the processed CM and mixed diets, then dropped down in the control trial, reflecting the normal trend against strange fish diets. Blood biochemistry, such as total protein and cholesterol, exhibited significant changes in the crude CM, processed CM, and the mixed trial compared to the control group. Regarding fish quality and nutrional values, fish muscle of fish fed crude CM contained the highest ash value of 7.58%, while it was 5.46% for those fed on the processed CM. However, fish muscles for mixed diets contained 5.19% ash and 62.19% protein. Human risk assessment was presented in this investigation by heavy metals determination. Pb value in fish muscles was 4.86mg/ kg for fish fed the crude CM; it was the highest one of all feeding trials. While, it decreased to 4.06mg/ kg after CM processing. The mixed feeding trial exhibited the lowest level of Arsenic (0.06mg/ kg). Processing chicken manure reduces its disadvantages by converting dispersed materials into pellets, thereby decreasing water pollution. It is not recommended to feed fish on pure crude chicken manure and pure processes of CM during the whole fish rearing, since fish need other nutrients and more energy to reduce the heavy metals formed due to chicken manure utilization. Utilizing a mixture of fish diet and processed chicken manure in fish farms, in controlled quantities, can mitigate environmental pollution. It's essential to implement processing procedures and ensure clean sourcing for optimal results. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Ciencias Agricolas is the property of University of Narino, Faculty of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose: Adding organic soil amendments, like animal manure, can alleviate the mobility of lead (Pb). However, there is a scarcity of in vivo studies examining the impact of animal manure as a soil amendment on mammals. Methods: Six C57BL/6 mice per group were raised for 30 and 98 days on soil containing 3000 mg Pb/kg. On Pb-spiked soil, chicken manure (40 t/ha) was applied as an immobilizer. Pb concentrations in the tissues were analyzed using ICP-MS after microwave digestion. RT-PCR was used to measure the mRNA expression of antioxidant and cell apoptosis genes in the liver, kidneys, and brain. Results: When chicken manure was used as the immobilizer in Pb-spiked soil, Pb concentrations in the brain, kidneys, and lungs at day 30 were significantly different (p < 0.05) with reduction percentages of 28.58, 26.63, and 25.62, respectively. The brain, kidneys, liver, and bone, except for the lungs and trachea, also showed a similar reducing phenomenon on day 98, with percentages of 11.82, 4.63, 29.87, and 14.54, respectively. There was a significant difference in the levels of Nrf2, HMOX1, SOD1, CAT, BCL2, and Bax in the brain between Pb-exposed and remediated groups after 98 days of exposure. Conclusions: This study highlights that the utilization of chicken manure reduced Pb accumulation in tissues (6.25–28.58% at 30 days and 4.63–29.87% at 98 days). This reduction in Pb accumulation subsequently alleviated the body burden by activating antioxidant genes in the brain, notably HMOX1, SOD1, and CAT. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Guangxi Normal University - Natural Science Edition is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Landfill leachate contains a significant amount of organic matter, making it a valuable source for CH4 production. However, due to its liquid form, the mono-digestion of leachate could result in a reduced CH4 yield per unit reactor volume. This necessitates its utilization in anaerobic digesters alongside solid waste streams. The objective of this study was to evaluate co-digestion performance of landfill leachate with different wastes using biomethane potential test and assess the optimum combination in terms of CH4 productivity. Modified Gompertz model was used for kinetic characterization. Experiments were held under mesophilic conditions and lasted for 30 days. Among mono-digestion of substrates, landfill leachate exhibited the highest CH4 productivity and yield: 83.17 mL/gVS.d and 793 ± 6.85 mL/gVS, respectively. Fish waste was found to have the lowest energy potential with 350 mL/gVS CH4 yield and 18.24 mL/gVS.d CH4 productivity. CH4 productivities for co-digestion cases ranged from 5.48 to 67.85 mL/gVS.d. Mixing landfill leachate and chicken manure with the same amount on wet weight basis yielded the highest CH4 productivity. On the other hand, inclusion of fish waste consistently resulted in decreased CH4 yield and productivity for all incubations, which suggests that fish waste may not be suitable as a co-substrate for landfill leachate in terms of CH4 production. Monitoring of chemical parameters revealed that buffering capacity of the system and free ammonia formation were the main parameters governing CH4 production. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Soil Sciences & Agricultural Engineering is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Global human population growth has resulted in significant intensive agricultural activity, posing substantial challenges to waste management and environmental conservation. Watermelon waste (WW), chicken manure (CM) and horse manure (HM) are among the main contributors to agricultural waste due to their abundant waste production. This study aims to manage the daily production of these wastes by utilizing WW as a bulking agent in the co-composting of CM and HM. Response surface methodology (RSM) was employed to analyze the effects of four independent factors: HM:CM composition, particle size, composting period, and bulking agent amount. Thirty treatments were developed using central composite design and in-vessel composting reactors were employed to study the relationship between the factors involved and compost physicochemical quality parameters. The results demonstrated significant effects on organic matter (OM), nitrogen (N), potassium (K), dry matter, moisture content, bulk density, and pH, while the carbon-to-nitrogen ratio (C/N) and phosphorus level were not affected. The optimized co-composting conditions obtained from RSM were 75:25 for HM:CM composition (%), 0.5 cm for particle size, 40 days for composting period, and 10% of WW, resulting in a compost with 61% OM, 2.5% N, and 2.5% K. These optimal conditions agreed closely with the predicted values; root mean square prediction error (RMSPE) was less than 0.50, revealing the success of RSM in determining optimal process parameters and developing models for predicting responses. Our study demonstrated that WW as a bulking agent in the co-composting of CM and HM has significantly enhanced the organic matter and nutrient levels of the final compost product. [ABSTRACT FROM AUTHOR]

[Display omitted] • Production of regenerable CO 2 adsorbent from bagasse fly ash and chicken manure. • Application of hydrothermal carbonization for nitrogen fixation on fly ash. • Use of statistical analysis model to predict the adsorbent's performance. The high cost of commercial CO 2 capture material is one of the issues hindering the widespread adaptation of the technology. This study explored efficient ways of utilizing waste material in the form of bagasse fly ash (BFA) as CO 2 adsorbent through thermochemical preparations of physical activation, and hydrothermal carbonization (HTC). The activation of BFA using flue gas was able to produce an adsorbent with good CO 2 adsorption capacity, with similar results to the CO 2 activation. The second approach using co-HTC of BFA with chicken manure (CM) optimized using Box-Behnken design of experiment was able to produce an adsorbent with CO 2 adsorption capacity nearly on-par with commercial adsorbents. It was also found that the model was able to accurately predict the experiment outcome when verified with the additional experiments. Material characterizations showed that the increase of the CO 2 adsorption capacity of the adsorbent might have been achieved through the formation of secondary amines deposited on the BFA. The results of this study showed that the utilization of waste in the form of BFA and CM could contribute to the advancement of circular and low-cost CO 2 capture medium from waste materials, which could increase the adaptation and involvement of sugar industry and poultry farm. [ABSTRACT FROM AUTHOR]

EFFICIENTLY optimizing strategic crop production in Egypt's degraded soils is imperative to address the nutritional gap and ensure food security. Consequently, a field trial was conducted over two consecutive summer seasons (2022 and 2023) to evaluate the potential impact of various organic fertilization sources as the main plots on soybean plant cultivated in soil with an EC value of 6.45 dsm-1. The organic treatments included a control group without organic fertilizers (I0 ), farmyard manure (FYM) compost (I1 ), plant residues (PR) compost (I2 ) and chicken manure (ChM) compost (I3). Additionally, the subplots were designated for foliar applications of proline amino acid, with three groups: F0 (without foliar application, serving as the control), F1 (proline at a rate of 60 mg L-1 ), and F2 (proline at a rate of 100 mg L-1 ). The study assessed various parameters at two stages: 80 days from sowing, focusing on growth indicators such as plant height, foliage fresh and dry leaf weights, and chlorophyll content and antioxidant indicators. At the harvest stage, yield-related parameters and quality aspects like the number of pods per plant, seed yield, oil, protein, carbohydrates, along with the analysis of soil nutrient availability. The results obtained illustrated that ChM compost (I3 ) proved to be the most effective organic source in promoting optimal performance under salinity conditions, as evidenced by superior growth indicators, yield-related parameters, and quality. Following closely was PR compost (I2 ), with FYM compost (I1 ) ranking third, while the control group (without organic fertilizers) exhibited the lowest performance. In addition, the findings highlight the positive impact of proline amino acid on enhancing plant tolerance to salinity stress, with performance improvements correlating with increased proline levels. The sequence of proline treatments, ranked from most effective to least, was F2, followed by F1 , then F0 (without proline). Analyzing soil fertility at the harvest stage, all organic sources positively influenced the availability of N, P, and K, with ChM compost (I3 ) demonstrating superior effects. The influence of proline was nearly negligible in this aspect. Overall, the combined treatment of I3 x F2 emerged as the most distinguished among the various interactions studied. Therefore, integrated approaches that combine optimal organic fertilization practices with proline applications, such as the studied combination of ChM compost and proline, should be promoted for enhanced soybean production. Ongoing research is essential to refine and expand these recommended practices for a comprehensive and sustainable approach to soybean cultivation in challenging soil conditions. [ABSTRACT FROM AUTHOR]

CLIMATE change is one of the most important global issues that impacts all our life sides. Growing crops and their productivity also are influenced by changing in the climate and climatic elements. Growing tea in non-traditional regions like Egypt could be considered a challenge due to the specific climatic and soil requirements for growing and production. However, with careful planning and experimentation, it might be possible to establish tea cultivation in such conditions. So, a lysimeter trial was conducted as an exploratory experiment aiming to assess tea cultivation performance in both sandy and clayey soil. Additionally, a separate field trial was carried out to evaluate tea growth in clayey soil along with applied organic fertilizer (chicken manure). The findings revealed that, under the lysimeter trial, tea plants exhibited robust growth on both sandy and clayey soil. Various parameters, including plant height, fresh and dry weights, leaf area, chlorophyll content, and leaf N, P, K levels, indicated superior performance on sandy soil compared to clayey soil. In the field trial, notable superiority was observed in plants grown on the organic medium containing chicken manure over those plants grown on clayey soil without such supplementation. These outcomes suggest that climate changes could potentially transform Egypt into a favorable region for tea cultivation. More studies are needed to establish a complete program of cultivation of tea including the water and nutrient requirements. [ABSTRACT FROM AUTHOR]

The study was done in the 2022 growing season on 16-year-old Arbequina olive trees cultivated at 6×6 m apart in clay sandy loam soil under a drip irrigation system in a private orchard located at Zakho region, Duhok governorate, Kurdistan region, Iraq, to study the influence of different types of fertilizers on the growth and productivity of olive trees (Olea europaea L.) cv. Arbequina. The experiment consists of twenty-seven treatments (three levels of soil application of chicken manure 0,5, 10 kg tree-1, foliar application of three conc. of seaweed extract (Sea force) 0,10,20 ml L-1 and soil application of three levels of mineral fertilizer Blaukorn NPK (12:12:16) at level (0, 150, and 200g tree-1), mineral fertilizer was applied three times per season: First: at vegetative growth stage. Second: at full bloom. Third: after setting of fruits. Results indicate that soil application of chicken manure, especially at 10 kg tree-1, and foliar spraying of Sea force at 20 ml L-1 significantly increased all studied characters (average leaf area, total chlorophyll content, number of flowers/inflorescences, fruit set %, fruit length, fruit width, fruit weight, total yield per tree, fruit total soluble solids (TSS%), Percentage of oil). Soil application of Blaukorn, especially at 200 g tree-1, significantly increased (average leaf area, fruits length, width and weight, and TSS). The binary and triple interactions of the study treatments on all the traits under investigation also showed a significant increase, particularly for the high levels of the study factors.

[Objectives]The purpose of this study was to explore the effects of the addition of black soldier fly on the nutrient and maturity of materials and gas emissions changes of materials during the transformation of chicken manure, providing scientific basis for promoting the biological composting of chicken manure by the black soldier fly. [Methods]Two treatments were set up in this experiment, one treatment was fresh chicken manure added with black water fly larvae(BSF treatment)and the other treatment was without black water fly larvae(control), comparing the changes of physical and chemical properties, greenhouse gas and ammonia emissions between these two treatments. [Results]Feed insect ratio of chicken manure treated with black solider fly was 6.70, and the biotransformation rate was 38.3%, the fresh weight reduction rate of the material was 66.0%, but the fresh weight reduction rate of the control group material was only 47.6%. In the experiment with a period of 12 days, the accumulated CO2 emission of the BSF treatment group was lower than that of the control group in the first 6 days, then the accumulated CO2 emission was higher than that of the control group, but CH4 emission was far lower than that of the control group. In addition, no obvious N2O emission was observed in both BSF treatment group and control group, and the non-CO2 global warming potential of BSF treatment group was significantly lower than that of the control group, which was only 7.09% of that produced in control group. Meanwhile, its cumulative emission of ammonia was higher than that of the control group. [Conclusions]The black soldier fly could directly reduce the amount of high-moisture material chicken manure and transform it into economically valuable insect body and vermiculite sand, and its emission potential of greenhouse gas was significantly lower than that of the control group. So, biocomposting of chicken manure by the black soldier fly was a low carbon, high efficiency and high value livestock and poultry manure treatment mode. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Entomology is the property of Chinese Journal of Applied Entomology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Due to the rapid development of animal husbandry, the associated environmental problems cannot be ignored, with the management of livestock and poultry manure emerging as the most prominent issue. Composting technology has been widely used in livestock and poultry manure management. A deeper understanding of the nitrogen conversion process during composting offers a theoretical foundation for selecting compost substrates. In this study, the effects of sawdust (CK) and spent mushroom compost (T1) as auxiliary materials on nitrogen as well as microbial structure in the composting process when composted with chicken manure were investigated. At the end of composting, the nitrogen loss of T1 was reduced by 17.18% relative to CK. When used as a compost substrate, spent mushroom compost accelerates the succession of microbial communities within the compost pile and alters the core microbial communities within the microbial community. Bacterial genera capable of cellulose degradation (Fibrobacter, Herbinix) are new core microorganisms that influence the assimilation of nitrate reduction during compost maturation. Using spent mushroom compost as a composting substrate increased the enzyme activity of nitrogen assimilation while decreasing the enzyme activity of the denitrification pathway. [ABSTRACT FROM AUTHOR]

In order to investigate the effect of compound antibiotics on anaerobic digestion of chicken manure, the inhibitory effect of three different combinations of oxytetracycline (OTC), sulfamethoxazole (SMZ), and enrofloxacin (ENR) on anaerobic digestion of chicken manure was studied by the sequencing batch method. Under the condition of adding three different combinations of antibiotics, the experiment was run for 50 days. The concentrations of soluble chemical oxygen demand (SCOD), total ammonia nitrogen (TAN), VFAs, and methane production in the reactor were measured, and the microbial diversity affecting the stability of the system was analyzed. The results showed that OTC and SMZ inhibited methane production, while SMZ and ENR promoted methane production, and the cumulative methane production was R4>R3>R1>R2. After the 25th day, the SCOD concentration in the R2 and R4 groups decreased, which was due to the existence of SMZ and ENR promoting the degradation of SCOD. TAN concentrations in the four groups were kept between 1,190 and 2,100 mg/L. The results of 16S rRNA sequencing showed that the mixed antibiotics had different effects on the bacterial community, which was mainly composed of Firmicutes, Bacteroidota, unidentified bacteria, Cloacimonadota, Proteobacteria, and Spirochaetota. Bacteroidota was superior in the whole reaction process under the influence of OTC and SMZ because it stimulated the microbial flora and made its activity higher. The study provides relevant data for the proper management of livestock manure. [ABSTRACT FROM AUTHOR]

Poultry waste can be produced into high-quality organic fertilizers by composting. In this project, a microbial agent was constructed. The objective of this study was to analyze the effectiveness of additives (microbial agent (TB) and manure compost (TM)) on composting process of chicken litter with mushroom residue. Results indicated that TB exhibited the highest composting temperature (72.1°C) and TM exhibited the longest high-temperature period (10 days). TB nutrients were better retained compared to the control and achieving a final total nitrogen (TN), total phosphorus (TP) and total potassium (TK) at 1.92%, 5.38% and 4.61%, respectively. After composting, the TP increased 1.22% in the treatments with manure compost inoculation compared with initial phase, while it increased 0.95% in CK2. At the end of composting, TM had lower E4/E6 values and organic matter (OM) content compared to CK2 illustrating that the addition of mature compost enhanced the humification of compost. Operational taxonomic units (OTUs) analysis revealed that TM increased microbial community diversity, however, TB decreased microbial community diversity compared to the control. Compared with the direct addition of a few specific microorganisms as microbial agents, the addition of mature compost can obviously increase the microbial species in the composting process, extend high-temperature period and promote fermentation process. Obviously, the above research results provide theoretical lessons on how to rationally add exogenous microbes to promote the composting process scientifically. [ABSTRACT FROM AUTHOR]

Ammonia, nitrate, and phosphate in animal manure used as fertilizer reduce environmental quality by running off agricultural fields into natural water resources. Runoff and seepage water from five soil management practices (chicken manure CM, sewage sludge SS, chitin CH, biochar Bio, and no-amendment NA control plots), were investigated for their potential nutrient catching down the field slope of a sweet potato, Ipomoea balata field. The results revealed that CM-amended soil released the greatest runoff water volume (172.6 L plot −1) compared to the control treatment (98.6 L plot −1), indicating a 75% increase in the runoff water volume. CM also increased the percolated water into the rhizosphere of the growing plants by 55% compared to the control, whereas SS reduced the runoff water volume and increased the leaching water by 36% and 82%, respectively (a desirable attribute of water conservation), compared to the control plots. The concentration of PO4−3 ions in the percolated water from the biochar treatment was significantly greater compared to the other treatments, indicating there was no impact of biochar on binding PO4−3 ions. SS reduced the nitrate concentrations in the runoff and increased the seepage water volume percolated towards the roots of the growing plants; a desired attribute for preventing surface water contamination by nitrates. Observing the precipitation pattern and improving the N application rate are recommended. [ABSTRACT FROM AUTHOR]

Due to the threat to food supply and human health posed by cadmium-contaminated wastewater, a highly effective adsorbent is under necessary development to remove cadmium from wastewater. In this study, four new types of modified biochars with different modifier concentrations were prepared from chicken manure using K2FeO4 as a modifier, and the modified biochar KFBC1 with the best adsorption effect was obtained through optimal experiments. Various characterization analyses have shown that KFBC1 has a rough surface structure, abundant pore structure, and a large number of functional groups. Additionally, iron oxides are introduced on the surface of the biochar, which provided a favorable condition for the adsorption of Cd(II) in wastewater. The adsorption performance of Cd(II) on the biochar before and after modification was investigated through batch adsorption experiments. The adsorption kinetic model of KFBC1 to Cd(II) in solution was in accordance with the quasi-secondary kinetic model, and the adsorption isothermal model was in accordance with the Langmuir model, with a maximum adsorption capacity of 330.06 mg/g, which was 5.15 fold of pristine BC. Meanwhile, the adsorption rate of Cd(II) by KFBC1 was positively correlated with dosage and pH. Pore adsorption, ion exchange, surface precipitation, interaction with -π electrons, and complexation of oxygen-containing functional groups on the surface were considered as important mechanisms for the removal of Cd(II) by KFBC1. According to the results, KFBC1 is a novel and efficient adsorbent that can be used as a treatment agent for cadmium-contaminated wastewater. [ABSTRACT FROM AUTHOR]

The study was done in the 2022 growing season on 16-year-old Arbequina olive trees cultivated at 6×6 m apart in clay sandy loam soil under drip irrigation system in a private orchard located at Zakho region, Duhok governorate, Kurdistan region, Iraq, to study the influence of different types of fertilizers on the growth and productivity of olive trees (Olea europaea L.) cv. Arbequina. The experiment consists of twenty-seven treatments (three levels of soil application of chicken manure 0,5, 10 kg tree-1, foliar application of three conc. of seaweed extract (Sea force) 0,10,20 ml L-1 and soil application of three levels of mineral fertilizer Blaukorn NPK (12:12:16) at level (0, 150, and 200g tree-1 ), mineral fertilizer was applied three times per season: First: at vegetative growth stage. Second: at full bloom. Third: after setting of fruits. Results indicate that soil application of chicken manure, especially at 10 kg tree-1, and foliar spraying of Sea force at 20 ml L-1 significantly increased all studied characters (average leaf area, total chlorophyll content, number of flowers/inflorescences, fruit set %, fruit length, fruit width, fruit weight, total yield per tree, fruit total soluble solids (TSS%), Percentage of oil). Soil application of Blaukorn, especially at 200 g tree-1, significantly increased (average leaf area, fruits length, width and weight, and TSS). The binary and triple interactions of the study treatments on all the traits under investigation also showed a significant increase, particularly for the high levels of the study factors. [ABSTRACT FROM AUTHOR]