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In Cuba, peanut planting and yield are low and produced with limited inputs. The use of biostimulants in cultivation could constitute an innovative alternative to counteract this problem. In the country, there is little research that addresses the issue. The aim of this work was to evaluate the effect of the combined application of microbial and nonmicrobial biostimulants on peanut nodulation and growth. Inoculation tests were carried out under controlled conditions where inoculants of two strains of rhizobia were applied as well as formulations based on these strains and Pectimorf®. A completely randomized design was used and 45 days after sowing, nodulation, biochemical and growth variables were evaluated in peanut plants. The results showed that the application of inoculants based on the Rhizobium sp. C145 in combination with Pectimorf® increased the dry mass of the nodules, the relative content of total chlorophylls, the stomatal conductance, the content of nitrogen and phosphorus, as well as the height of the plants, the root length and the number of flowers . This research is the first evidence in Cuba that proves the positive effect of the combination of bacterial inoculants with Pectimorf® in the cultivation of peanuts. [ABSTRACT FROM AUTHOR]

Copyright of Ecosistemas y Recursos Agropecuarios is the property of Universidad Juarez Autonoma de Tabasco 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.)

Copyright of Ecosistemas y Recursos Agropecuarios is the property of Universidad Juarez Autonoma de Tabasco 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.)

Copyright of Revista CienciaUAT is the property of Universidad Autonoma de Tamaulipas 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.)

Objective. Determine the effect of bokashi fertilization on the growth and yield of ball tomato (Solanum lycopersicum L) in Yucatan. Materials and methods. The number of leaves/plant (HP), the plant height (AP, cm), the fresh weight of the plant (PFP, g), the dry weight of the plant (PSP, g), the production of fruit/plant (PF, g), fruit/plant yield (RFP) and yield/ha (RFH, t/ha) at 50 and 70 days after transplanting. The statistical model included the fixed effects of 100% chemical fertilization (FQ100), 100% bokashi fertilization (FB100), and the combination of chemical and bokashi fertilization (FQB50). Results. The effects were significant for most of the variables evaluated (P=0.05). FQ100 exceeded FB100 values in HP, AP, and PFP, but were similar in PSP. FQ100 also outperformed FQB50 in PFP and PSP, although they were similar in HP and AP. FQ100 and FQB50 achieved similar values in PF and RFH, surpassing FB100. Conclusions. FQ100 achieved better fruit yields for ball tomato (Solanum lycopersicum L) compared to FB100, but similar effects can be achieved if both products are combined (FQB50). [ABSTRACT FROM AUTHOR]

Copyright of Ecosistemas y Recursos Agropecuarios is the property of Universidad Juarez Autonoma de Tabasco 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.)

Copyright of Revista Colombiana de Biotecnología is the property of Universidad Nacional de Colombia 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.)

Copyright of Revista U.D.C.A Actualidad & Divulgación Científica is the property of Universidad de Ciencias Aplicadas y Ambientales U.D.C.A 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.)

Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy 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.)

The work was developed in the urban organic garden "Mercasa", Las Tunas; in the period from the first day to December 27, 2019, with the objective of evaluating the effect of different doses of VIUSID® Agro on the yield of lettuce crop, cv. Fomento-95, under urban organic garden conditions. A completely randomized design with four treatments (control without application and application of VIUSID® Agro at 0.15, 0.20 and 0.25 ml L-1 of water) was used. The following morphoagronomic variables were evaluated: plant height, leaf length and width, stem diameter, number of leaves, root length, mass per plant and yield. The data obtained were subjected to a simple analysis of variance using the Statgraphics statistical package. The best results obtained in most of the morphological and yield variables evaluated corresponded to the VIUSID® Agro dose of 0.15 ml L-1 of water, with greater economic feasibility. [ABSTRACT FROM AUTHOR]

Copyright of Ecosistemas y Recursos Agropecuarios is the property of Universidad Juarez Autonoma de Tabasco 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.)

The production of common bean (Phaseolus vulgaris L.) still does not meet the needs of population consumption, given the limitations and low distribution of the technological package that includes several products of international origin that guarantee the management and health of the crop, among which the nutritional requirements are of great importance. The combined effect of different bioactive products on the growth and yield of common bean seeds cultivar 'Buenaventura', was evaluated. The experiment was conducted at the Jucaibama Experimental Station, belonging to the Instituto de Investigaciones Agropecuarias "Jorge Dimitrov", Bayamo municipality, Granma province, during the months of December to March 2015-2016, on a poorly differentiated Fluvisol soil. Four treatments were evaluated (Mycorrhizae, and the combinations QuitoMax + Mycorrhizae and Bayfolan Forte + Mycorrhizae). A randomized block experimental design with three replications was used. The following indicators were evaluated: plant height (cm), stem diameter (cm), root length (cm), number of pods per plant, number of seeds per pod, seed mass (g), 100-seed mass (g) and yield (t ha-1). The data obtained were processed by a double ranked analysis of variance. Multiple comparison of means was performed through Duncan's test for p=0.05. The statistical package Statistica, version 8.0 for Windows was used. The results showed that the combination of Mycorrhiza + QuitoMax increased growth, yield in common bean plants cultivar 'Buenaventura'. [ABSTRACT FROM AUTHOR]

Copyright of Agroindustrial Science is the property of Agroindustrial Science 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.)

Plantain is an important crop for Ecuador due to its contribution in socio-economy and food security of this country, supplying rich-energy food to most of the population; in addition, it is necessary to carry out fertilization management that allows a better use of this resource and increase the yield. Magnesium fertilization in 'Barraganete' (Musa AAB) plantain was evaluated in El Carmen, Manabí, Ecuador. The research was conducted in the Experimental Farm "Rio Suma", Universidad Laica Eloy Alfaro de Manabí, Extension El Carmen, located at 260 masl, average temperature of 24 °C, annual rainfall of 2 684 mm. Six levels of MgO (0, 25, 50, 75, 100, 125 kg-ha-1) were applied to know its effect on morpho-physiology and plant yield. A completely randomized block design with six treatments and three replications was used; the sowing was carried out with a distance of 2.50 m x 1.80 m (2 222 plants-ha-1), and the variables of vegetative growth were evaluated as repeated measures over time. The results demonstrated significant differences in all the morpho-physiological variables, which showed that fertilization with 30% MgO affected the growth of the plants; however, the reproductive variables were not affected by the applied doses; the 25 kg-ha-1 dose generated the best yields, agronomic efficiency and partial productivity factor. [ABSTRACT FROM AUTHOR]

Copyright of Ingente Americana is the property of Ingente Americana 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.)

Copyright of Revista Biológico Agropecuaria Tuxpan is the property of Revista Biologico Agropecuaria Tuxpan 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.)

Copyright of Revista CIENCIA UNEMI is the property of Universidad Estatal de Milagro (UNEMI) 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.)

Copyright of Argentinian Horticulture / Horticultura Argentina is the property of Revista Horticultura Argentina 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.)

Copyright of Argentinian Horticulture / Horticultura Argentina is the property of Revista Horticultura Argentina 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.)

Chitosan is a natural biopolymer that is extracted from the exoskeletons of crustaceans, however, it has different applications at an industrial level, in the agricultural field it is used to improve nutrition and crop yield, also to free plants from stresses that are caused by the environment. The objective of this research was to evaluate the effect of chitosan on the growth and productivity of Solanum lycopersicum L. Four treatments were used, which consisted of three doses of chitosan (100, 500 and 1000 mg L-1) and a control treatment, where the plants were sprayed at 15 and 30 DAT, using a completely randomized block design, with four repetitions. Analysis of variance and independent comparisons of Tukey means were performed. The results show that the high dose (1000 mg L-1) stimulated the values of plant height, stem diameter, number of bunches/plant, number of fruits / plant, equatorial and polar diameter of fruits, fruit weight, as well as the yield in tomato plants. [ABSTRACT FROM AUTHOR]

Copyright of BIOAGRO is the property of Revista BIOAGRO 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.)

Copyright of Boletín Científico Centro de Museos de Historia Natural is the property of Universidad de Caldas 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.)

Copyright of Agro Productividad is the property of Colegio de Postgraduados 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.)

Copyright of BIOAGRO is the property of Revista BIOAGRO 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.)

Copyright of Agronomía & Ambiente is the property of Universidad de Buenos Aires. Facultad de Agronomia 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.)

Copyright of Agro Productividad is the property of Colegio de Postgraduados 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.)

Increase the yield is the main purpose in the processes of agronomic management and plant breeding, therefore the objective of this study was to evaluate the effect of 7 doses of gibberellic acid (0, 10, 20, 40, 60, 80 and 100 mg L-1) and 2 doses of TRIGGRR FOLIAR (0 and 5 ml L-1) in the yield of adult plants of sacha inchi, under a RCBD with factorials. The application of the growth regulators induced the formation of new branches and new female flowers. The number of fruits increased as the concentration of gibberellic acid increased to 60 mg L-1, but concentrations of 80 and 100 mg L-1 induced the formation of fewer fruits. The treatment that contained 60 mg L-1 of gibberellic acid and 5 ml L-1 of TRIGGRR increased the yield in adult plants from 841 to 1278 kg-1 ha-1 year-1. The results of this study show that gibberellic acid is a growth regulator with the potential to induce new branches and promote the development of new female flowers and fruits in sacha inchi. [ABSTRACT FROM AUTHOR]

Copyright of Agronomía & Ambiente is the property of Universidad de Buenos Aires. Facultad de Agronomia 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.)

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.)

Megathyrsus maximus (Jacq.) B.K. Simon & S.W.L. Jacobs (=Panicum maximun Jacq.) was introduced in Cuba in1967, from Guadeloupe Island, and in 1977 the genetic improvement work started at the EEPF Indio Hatuey. In this sense, the objective of this article is to analyze the results reached in Cuba in systems that utilize M. maximus for its characteristics of adaptation to climate change and its potentialities in the tropical area. Among the priority purposes of the improvement program the selection of high productivity varieties was found, with good responses in the dry season and high nutritional value. Introduced cultivars, clones from the Cuban population, apomictic hybrids, sexual plants and somaclones were selected. The somaclones and hybrids made a significant contribution in the nutritional quality index in relation to natural populations. It was proven that M. maximus adapts to different edaphoclimatic conditions; according to the evaluation of its underground phytomass it withstands drought, has high yields, high production of botanical seed, adequate nutritional value, good associative capacity with different herbaceous legumes, tolerate the shade in systems with trees, tends to be quite resistant to pests; good quality is achieved in silages with and without additives, also a high potential for milk and meat production. It is considered that the evaluated and recommended varieties of M. maximus have the requisites to be included in animal husbandry ecosystems resilient to climate change. [ABSTRACT FROM AUTHOR]

The effect of the arbuscular-mycorrhizal inoculation on the reduction of organic and nitrogen fertilization in Guinea grass (Megathyrsus maximus cv. Likoni), cultivated on a Ferruginous Gley Nodular soil, located in the Cascajal locality, Villa Clara province, Cuba, was evaluated. Thirteen treatments were studied, formed by: absolute control, applications of 12,5 and 25 t of cattle manure ha-1 combined with 0, 105 and 150 kg N ha-1 year-1, with and without inoculation of the mycorrhizal fungus Funneliformis mosseae. The design was randomized blocks with four replications. The cattle manure increased pH and the contents of organic matter, assimilable P and exchangeable K of the soil; the highest effects were obtained with 25 t ha-1. In the absence of inoculation, the highest dry matter yields (16,57 t DM ha-1) and N (18,9 g kg-1 DM), P (2,3 g kg-1 DM) and K concentrations (17,9 g kg-1 DM) in the biomass were reached with the addition of 25 t of manure ha-1 and 105 kg N ha-1. These treatments showed the highest frequency and intensity of mycorrhizal colonization (57,7 and 58,2 %) and the highest number of spores (503 and 491 spores/g of soil) of arbuscular-mycorrhizal fungi (AMF) in the rhizosphere. With the inoculation of F. mosseae at the moment of planting, the cattle manure doses and the nitrogen fertilizer can be reduced in 50 and 30 %, respectively, without affecting the nutrient content in the biomass or the yield, during two years of crop growth. [ABSTRACT FROM AUTHOR]

Gladiolus rust, caused by Uromyces transversalis, affects foliage and reduces flower quality of Gladiolus spp.; this can lead to severe economic loss because of reduced yields, and even total crop loss. Spatial analysis studies of this disease are fundamental in order to plan strategies to manage crop health, improve sampling methods, and determine both current and potential production losses. The aim of this study was to analyze the spatial distribution of rust using geostatistical techniques in the municipalities of Ocuilan, Tenancingo and Villa Guerrero, in the southeastern region of the State of Mexico, during the spring-summer growing cycles of 2013 and 2014. The severity level of the disease was estimated at 121 georeferenced sampling points within each evaluated area. Gladiolus rust showed an aggregated spatial distribution in the different crop phenological stages during which it expressed throughout the two years of the study. The spatial dependency model was best described by the Gaussian model, followed by the spherical one. [ABSTRACT FROM AUTHOR]

Yield, population and height of plants from experiments done on previous years of evaluation of Pennsisetum purpureum clones were used to obtain the relation with different climatic factors. In the principal component analysis for each of the agronomic indicators, three components were obtained with an eigenvalue superior to one and to select the climatic factor with the best contribution a preponderance factor of 0.70 was used. The variability explained for the height of the plants was 84.78% and maximum temperature and number of days with mean temperature higher than 30ºC does not contributed to the variability. The 84.74% of the variability of the population was explained by the maximum and mean temperatures, total rain, number of days with rain, number of days with minimum temperature inferior to 15ºC, and the number of days with maximum temperature higher than 25ºC. The yield variability (83.78%) was explained by mean of minimum and mean temperatures, total rain, number of days with rain, number of days with minimum temperature inferior to 15 ºC, and number of days with mean temperatures higher than 30ºC. More than 50% of the variability of the height of the plant, yield and population was explained by the mean temperature, total rain, number of days with rain, and minimum temperature inferior to 15ºC. [ABSTRACT FROM AUTHOR]

The study was conducted at the horse rearing farm Los Limones, located in Jagüey Grande (Matanzas), in order to evaluate the yield of five accessions of Cenchrus purpureus (Schumach.) Morrone under production conditions. The treatments were the accessions king grass, OM-22, CT-169, Taiwán morado and CT-115. The plant height, total DM yield, leaf yield, stem yield, CP content, CF content and digestibility were measured. To analyze integrally the results a factorial analysis was made through principal components, using the Varimax method; for such purpose the accessions that had a similar performance from the impact indexes were analyzed and the cluster history and the association degree among the compared elements were taken into consideration. CT-169 and king grass were significantly higher (p < 0,001) in height than the other accessions. King grass showed significant difference in the total DM yield and in the stem yield with regards to the others, in the year as well as in the dry season. OM-22 and Taiwán morado achieved the highest CP percentage in the leaves and stems. From the productive point of view the best accessions were OM-22 and Taiwán morado, which showed a higher leaf proportion with regards to the total DM yield and stood out for their CP content and their acceptable digestibility. The performance in yield and quality of the accessions contributed to show the productive potentials of C. purpureus on the soils of the locality. [ABSTRACT FROM AUTHOR]

A study was conducted during two years at the Soils and Fertilizers Research Station Escambray (located in the Cienfuegos province, Cuba), in order to evaluate the effect of the application of different doses of Azospirillum lipoferum in Megathyrsus maximus cv. guinea tobiatá. For such purpose a randomized block design was used, with seven treatments and three replications. The treatments were: doses of application of the biofertilizer (L ha-1): 25, 50, 75, 100 and 125; a control with NPK at planting (45 kg ha-1 of nitrogen in alternate cuttings); and an absolute control. The plots measured 16 m², with an evaluable area of 9 m². The A. lipoferum strain used was INICA-8, with an average concentration of 108 cfu g-1 of seed. Four cuttings per year were made, with a frequency of 90 days, at a height above the soil of 25 cm, and in each cutting the dry matter yield was evaluated. The application of A. lipoferum had a favorable influence on the pasture establishment; the accumulated yield was 27,91; 28.34; 30,17; 30,23 and 31,92 t DM ha-1 for 25, 50, 75, l00 and 125 L ha-1, respectively, with significant difference from the control. The highest DM yield was found in the fertilized control (54,45 t DM ha-1), which differed significantly from the other treatments. It is concluded that this biopreparation can be an alternative to mineral fertilization. [ABSTRACT FROM AUTHOR]

At the Pastures and Forages Research Station Sancti Spíritus, a field trial was conducted under drought stress conditions, to evaluate the effect of the inoculation with a strain of Bradyrhizobium sp. and the fungus Trichoderma harzianum, in triticale (X. Triticosecale Wittmack). The experimental design was completely randomized, with four replications and seven treatments. A control fertilized with NH4NO3 (150 kg N/ha) was used, as a well as an absolute control and five inoculated treatments. The variables aerial dry weight, root dry weight, stem length, grain yield, weight of a thousand seeds and number of grains per ear were evaluated. The simple application of Bradyrhizobium or in combination with Trichoderma, in general, exerted a positive effect on the plants, and was higher than the application of chemical fertilizer. It was also observed, that the development of the aerial part and the grain yield were not related to the application of mineral nitrogen, but to the inoculation. It is recommended to conduct similar experiments on different soil types in the Sancti Spíritus province, under drought stress conditions. [ABSTRACT FROM AUTHOR]

An experiment was carried out to evaluate the effect of planting density (12 500, 25 000 and 37 500 plants/ha) and nitrogen fertilization (100, 300 and 500 kg N/ha/year) on the yield and bromatological composition of Morus alba var. tigreada. The dry matter yield of the total (DMYTB) and edible biomass (DMYEB), and the yield of the leaves (DMYL) and the fresh stems (DMYFS) were measured during two years. The crude fiber (CF) and crude protein (CP) percentages were also calculated. There was interaction of the factors (p < 0,05) in the DMYFS; the highest values were obtained when the maximum planting density was combined with the three doses of N (0,37; 0,35 and 0,32 kg DM/plant), as well as when combining 25 000 plants/ ha with 300 and 500 kg N/ha/year (0,27 and 0,34 kg DM/plant, respectively). In the variables DMYTB, DMYEB and DMYL there was no interaction of the studied factors. The highest values of total and edible biomass and leaves were reached with 37 500 plants (4,43; 2,37 and 2,03 kg DM/plant ) and the maximum dose of N (3,16;1,89 and 1,68 kg DM/plant). It is concluded that the best results regarding the yield of mulberry were obtained with the density of 37 500 plants/ha; its combination with the lowest dose of N produced high yields of fresh stems, which constitutes an important component of the biomass consumed by livestock. [ABSTRACT FROM AUTHOR]

In the Agricultural University of Havana biostimulators are produced which have been successfully used in the agricultural production of different plant species. Among them is Liplant --a product derived from earthworm humus containing hormonal fractions-, with which satisfactory results have been obtained in the in vitro propagation of several crops, as well as in ex vitro applications of others. The objective of this work was to determine the influence of the doses of this product on the bromatological composition and growth, as well as the yield of DM and some of its components. A factorial design was used under semi-controlled conditions and three treatments: 0, 1/20 and /40 (v/v), with two studied factors: without fertilization and with fertilization, on a lixiviated Ferralitic Red soil. Significant difference (P<0,05) for plant growth and number of shoots with the application of Liplant in the dilution1/20 was found ; while no differences were found in the dry matter yield when applying the product. The analysis allowed to conclude that the dilution 1/20 favored the evaluated indicators, except the DM yield, althoughr it is necessary to test these results under field conditions. [ABSTRACT FROM AUTHOR]

Currently there are no studies on the damage caused by Rhizoctonia solani Kuhn [teleomorph Thanatephorus cucumeris (Frank) Donk] on the yield components of common bean (Phaseolus vulgaris L.), therefore the aim of this study was to quantify the reduction in grain yield and its yield components caused by natural infection of web blight in different bean genetic material, in summer 2011, in Quevedo city, Los Rios, Ecuador. Were used lines Cf4 0-0-2-1, Cf6 0-0-4-9, Cf6 0-0-4-8, SER 03 and SER 08, and two varieties FTS Soberano and BRS Valente. Incidence (%) and percentage of severity and number of lesions leaflet-1 were quantified, and these values used to calculate the area under the disease progress curve (AUDPC). Also, it was quantified the number of lesions leaflet-1 during reproductive stages R7 and R8. After harvest, it was quantified the number of nodes, pods and seeds per plant, seeds per pod per plant, and yield (kg ha-1). For estimating the damage caused by the disease were used integral and critical point models, performing regression analysis between disease intensity (independent variables), and grain yield and its components (dependent variable) obtaining the equations of damage function. The results of this research showed that integral and critical point models, are an important tool for estimating damage by web blight on yield components being more evident in the number of seeds per plant (p<0.01). [ABSTRACT FROM AUTHOR]

The cocoyam (Xanthosoma spp. and Colocasia esculenta) is a monocot plant with vegetative propagation. This work was developed with the aim of determining the effect of the planting material type on the incidence of dry rot in two cultivars of Colocasia and Xanthosoma genera. Primary and secondary rhizomes, crowns of primary rhizomes and in vitro plants were used. The plantation was maintained for twelve months and the plants were characterized morphologically in the growing stage. Besides, it was determined the incidence of dry rot per treatment at growing and harvest stage. Finally, the yield was determined. When in vitro plants were used the percentage of incidence and intensity of the damage of dry rot was less in both cultivars. The yield in primary rhizomes and overall was significantly higher. The results indicated the superiority of in vitro plants as initial plantation material over the traditional seed used in taro culture. Furthermore, it allows the designing a seed production program by biotechnological methods. [ABSTRACT FROM AUTHOR]

Copyright of Revista Facultad de Ciencias Basicas is the property of Revista Facultad de Ciencias Basicas 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.)

The objective of this work was to evaluate the agronomical and phenological performance of several safflower cultivars (Carthamus tinctorius L.) in the Pampean Semiarid region. The trial was carried out al Anguil Agricultural Experiment Station, La Pampa, Argentina, during the period 2009/2010. The treatments were 14 commercial cultivars arranged in a design of random blocks with 3 repetitions. The experimental plots consisted of 4 furrows at distance of 0.52 m between them with a length of 5 m. A conventional tillage was applied to the manual sowing 09/08/2009. The mechanized harvest took place on the 9 th of February this year. Results were analyzed by ANOVA and Duncan test al 5%. There were not important differences among cultivars concerning the occurrence of phenological stages recorded during the crop cycle. Considerable differences on the average yield of the 14 evaluated safflower cultivars were not found. However, a highly important difference in the percentage of oil content was detected. With reference to the crop development, it was observed that the plants neither achieved their maximum potential nor a good structure. Despite the fact previously mentioned, the yields can be considered satisfactory, as the crop completed its cycle. [ABSTRACT FROM AUTHOR]

The yield components of tricepiro and triticale experimental lines, with aptitude for grain and forage production, were analyzed in this work as an indirect approach to improve grain production. Partitioning of single correlations in direct and indirect effects provides information on the functional relationship between components of different hierarchy and the end product. The thousand grain weight showed a highly significant direct influence on grain yield. The number of grain per ear had also a significant effect but was a less explanatory variable. The use of these two variables together would help plant breeders to select genotypes with better grain yield. [ABSTRACT FROM AUTHOR]

The Fungi and plants cell wall is mainly composed of complex carbohydrates. Some fragments derived from these carbohydrates have an elicitor activity in plants, being known as oligosaccharine. The type of effect and specificity differ according to the oligosaccharine physicochemical characteristics and the plant species perceiving the signal. Understanding the action mechanisms, as well as all the signals regulating gene expressions and stimulating the synthesis of molecular effectors associated with the plant protective reactions could solve several problems present in vegetable crops, which are associated with resistance to diseases, yield and quality related aspects. Further studies are also needed to explore the feasibility of these models in agriculture, since they may represent an alternative to reduce the use of chemicals, and to analyze the potential of these molecules to improve yield and quality of agricultural products. [ABSTRACT FROM AUTHOR]

An agricultural system in which plant and animal production is simultaneously managed in time and space is described. The study was carried out on El Aguacate farm in Esmeralda municipality, Camagüey province, Cuba. This farm has 73 ha extension, a 28,3 oC average mean temperature, an 87 % average relative humidity, and a 1 999 mm annual rainfall level. Agricultural production for sale and farmers' consumption comprises milk, yearling cattle (only for sale), fattened yearling lambs, sheep, hen eggs, Guinea hens, and fattened swines. Sheep feeding sites extend up to 64,4 % of the total area, i.e., on the same yearling cattle grazing grounds, on banana plantations, within citrus trees spots, and on various-crop production area after harvest. Energy and nitrogen balances were determined according to Funes-Monzote (2000). Although lactating piglets feed on banana plantation grounds, production remained steady. However, the introduction of sheep affected 1 % of citrus plants and 6 % of fruit plants. Bovine milk and meat production as well as ovine production showed a positive balance in contrast to swine production. As to nitrogen balance, plant production exhibited higher levels. More than 75 % of the total area is covered by average-tall plants. Harmony between management and positive energy and nitrogen balance showed this agricultural system sustainability, being an example to imitate by other farms with similar conditions. [ABSTRACT FROM AUTHOR]

The cape gooseberry is one of the most important exotic fruits for Colombia; however, its cultivation present high variability in plant development and yield attributes. The development of varieties with high yield, homogeneity and good adaptation are the main objective in the cape gooseberry breeding program in the country. This study is focusing on determining the effect of the genotype-by-environment interaction (GxA) on earliness, plant development and yield traits in nine cape gooseberry genotypes through AMMI analysis. The genotypes were evaluated in seven environments with different altitudes and environmental conditions using a randomized complete block design with four replicates. The results indicated that the genotype, environment, and their interaction contributed to the phenotype of the traits: days to flowering and first ripe fruit, plant height, number of nodes, yield and fruit weight. In contrast, the GA interaction was not signifi- cant for stem diameter, internode length, days to first harvest and number of branches. Most of variation was explained by the environment, which ranged between 42.2 and 83.6%, while the genotype explained between 1.5 and 9.5% of the variation. Genotypes I and B were superior, presenting a wide adaptation, earliness and average yield of 27.3- and 26.4-ton ha-1, respectively. [ABSTRACT FROM AUTHOR]