Search

Copyright of Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 experiment was to study the effects of bacterial enzyme cooperative fermented feed on the nutrient apparent digestibility, milk yield, milk composition, and antioxidant index of dairy cows. A total of 160 lactating cows were randomly divided into two groups, with 10 replicates per group and eight cows per replicate. The control group was fed a basal diet, while the experimental group was fed a basal diet supplemented with 10% bacterial enzyme cooperative fermented feed. The preliminary trial lasted for seven days, and the formal trial period was 42 days. The results showed that compared with the control group, the apparent digestibility of crude protein, crude fat, neutral detergent fiber, and acid detergent fiber in the experimental group were significantly increased (P<0.05), milk yield and feed conversion rate were significantly increased (P<0.05), milk protein content was significantly increased (P<0.05), and the number of somatic cells and total bacterial count were significantly decreased (P<0.05); the activity of superoxide dismutase (SOD) and the total antioxidant capacity (T-AOC) were significantly increased (P<0.05), and the content of malondialdehyde (MDA) was significantly reduced (P<0.05). The study indicates that the addition of 10% bacterial enzyme cooperative fermented feed in the diet can improve the nutrient apparent digestibility, milk yield, milk quality, and serum antioxidant capacity in lactating cows. [ABSTRACT FROM AUTHOR]

The experiment aimed to investigate the impact of substituting corn with fermented sweet potato potato on the growth performance, serum biochemical indexes, immune indexes, and intestinal morphology of yellow-feathered broilers. A total of 360 one-day-old yellow-feathered broilers were randomly divided into four groups, with six replicates in each group, and 15 broilers in each replicate. The broilers in control group were fed a basal diet. Groups I, II, and III were fed diets with 1%, 3%, and 5% fermented sweet potato pomace substituting corn, respectively, from 1 to 21 days of age, and 5%, 8%, and 10% from 22 to 42 days and 43 to 70 days of age, respectively. The trial lasted for 70 days. The results showed that substituting corn with fermented sweet potato pomace did not significantly affect the average daily weight gain, average daily feed intake, and feed conversion ratio of the yellow-feathered broilers (P>0.05). Compared to the control group, the levels of serum high-density lipoprotein cholesterol (HDL-C), immunoglobulin A (IgA), immunoglobulin G (IgG), interleukin-2 (IL-2), and interleukin-6 (IL-6) in groups I and II were significantly increased (P<0.05). At 21 days of age, the villus height and crypt depth of the duodenum in group I were significantly reduced (P<0.05), while the crypt depth in the ileum was significantly increased (P<0.05), and the villus height to crypt depth ratio (V/C) in the ileum of groups I and III were significantly decreased (P<0.05). At 42 days of age, the villus height of the duodenum and jejunum and crypt depth of the jejunum in group III were significantly reduced (P<0.05), the V/C of the duodenum in group I was significantly increased (P<0.05), and the villus height of the ileum in groups I and II were significantly increased (P<0.05). At 70 days of age, the villus height and V/C of the duodenum in groups I and II were significantly increased (P<0.05), the crypt depth was significantly reduced (P<0.05), and the villus height and V/C of the jejunum in group II were significantly increased (P<0.05). The study indicates that adding fermented sweet potato pomace to the diet as a substitute for corn can improve the serum immune indicators and intestinal tissue morphology of yellow-feathered broilers, and the optimal supplemental level is 5% at 1 to 21 days of age and 8% at 22 to 70 days of age. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 purpose of this experiment was to study the effects of fermented feed on the growth performance, meat quality, and economic benefits of broilers. A total of 1 600 AA broilers were divided into four groups with four replicates in each group and 100 broilers in each replicate. The control group was fed with basal diet, and the experimental group was fed with 2.5%, 5.0%, and 10.0% fermented feed, respectively. The trial period was 42 days. The results showed that from 22 to 42 days old, body weight, average daily gain, and average daily feed intake of 5.0% group and 10.0% group at 42 days of age were significantly increased (P<0.05), and the ratio of feed to gain was significantly decreased (P<0.05). From 1 to 42 days old, the average daily gain and average daily feed intake of 5.0% group and 10.0% group increased significantly (P<0.05), and the feed to gain ratio decreased significantly (P<0.05). The pH24 h value, L* value, b* value, and cooking loss of muscle in 5.0% group and 10.0% group decreased significantly (P<0.05). Shear stress in of muscle in 2.5% group, 5.0% group and 10.0% group decreased significantly (P<0.05). The contentrations of glycine and inosinic acid in muscle of 5.0% group and 10.0% group increased significantly (P<0.05). Compared with the control group, the weight gain of 2.5% group, 5.0% group, and 10.0% group increased by 2.55%, 8.74%, and 12.26%, respectively, and the breeding profit increased by 2.69%, 11.73%, and 13.15%, respectively. The study indicates that broilers fed proper amount of fermented feed can improve growth performance, meat quality, and breeding profit, and it is more suitable to feed 5%~10% fermented feed. [ABSTRACT FROM AUTHOR]

The experiment aimed to explore the effects of autumn supplementary feeding on the serum biochemical indexes of Oula sheep at different age stages. A total of 24 healthy and similar-conditioned Oula ewes at the ages of 6, 12, and 36 months were selected for each age group. The Oula sheep at each age stage were randomly divided into a grazing group (group 1) and a grazing + supplementary feeding group (group 1), with three replicates in each group and four sheep in each replicate. The pre-feeding period was 10 days and the formal experimental period was 60 days. The results showed that the average daily weight gain of the group ii was higher than that of the group i for 6-month-old and 12-month-old sheep ( P<0.05). In 6-month-old sheep of the group i, the serum E2 and GH levels were higher than those in the group i ( P<0.05). In 12-month-old and 36-month-old sheep of the group i, the ALP activity was higher than that in the group i( P<0.05). In 6-month-old sheep of the group i, the serum GLB level was higher than that in the group i( P<0.05). In 12-month-old sheep of the group, the IL-2 level was higher than that in the group ( P<0.05). In 36-month-old sheep of the group, the levels of GLB, IgM, IL-4, and IL-6 were higher than those in the group ( P<0.05). In 6-month-old sheep of the group, the serum GSH-Px activity was higher than that in the group ( P<0.05). In 12-month-old and 36-month-old sheep of the group, the SOD activity was higher than that in the group ( P<0.05). The study suggests that autumn supplementary feeding promotes the rapid maturation of 6-month-old ewes, enhances the growth, metabolic capacity, immune function, and antioxidant ability at different age in Oula sheep. [ABSTRACT FROM AUTHOR]

Ginseng by-products mainly include ginseng residue, and unused ginseng stems, leaves, flowers, fruits, and roots, etc. They are rich in ginsenoside, ginseng polysaccharide, and other active substances, and have a variety of biological functions such as improving immunity, anti-fatigue, bacteriostasis, and anti-virus. At present, ginseng by-products are primarily treated as waste, which not only maximize their effects but also resulting in a waste of resources. Ginseng by-products have good application prospects in animal production. Ginseng residue, as well as ginseng stems and leaves, can be used as dietary components or additives, and the ginsenoside found in ginseng stems and leaves can also serve as an adjuvant for animal vaccines. Therefore, the paper reviews the biological functions and application in animal production of ginseng by-products, to provide a reference for improving the comprehensive utilization rate of ginseng by-products and improving animal production. [ABSTRACT FROM AUTHOR]

The purpose of the paper was to explore the effect of adding different levels of soybean active peptides to the diet on the growth performance, carcass traits, serum biochemical indexes and intestinal microorganisms of finishing pigs. A total of 120 finishing pigs with a weight of (72.40±1.10) kg were randomly divided into four groups, with three replicates in each group and 10 pigs in each replicate. The finishing pigs in the control group were fed a basic diet, and group A, group B and group C added 0.2%, 0.4% and 0.6% soybean active peptides in the basic diet, respectively. The experiment lasted for 42 days. The results showed that the average daily gain of the finishing pigs was significantly increased by adding soybean active peptide (P<0.05). Compared with the control group, the feed-to-weight ratio of the group B was significantly reduced (P<0.05), and the feed-to-weight ratio and average back fat thickness of the group C were significantly reduced ( P<0.05). Adding soybean active peptide could improve the meat color and significantly reduce the dripping loss of the finishing pigs in the group B and group C (P<0.05). Compared with the control group, the content of serum MDA in the experimental groups decreased significantly (P<0.05), the content of serum BUN in the group B and group C decreased significantly (P<0.05), the content of IgM and T-AOC increased significantly (P<0.05). The activity of serum AST and GSH-Px in the group C decreased significantly, and the content of IgG increased significantly (P<0.05). The flora with a relative abundance of more than 1% at the phylum level in each experimental group included Firmicutes, Proteobacterium and Bacteroides, and the relative abundance of Proteobacterium in the group C was significantly lower than that in the control group (P<0.05). The flora with a relative abundance over 1% at the genus level included Actinomycetes, Coprococcus, Clostridium and Enterobacter, and there was no significant difference in the relative abundance of each genus compared with the control group (P>0.05). The study indicates that adding 0.4%~0.6% soybean active peptide to the diet can improve the growth performance, modify carcass traits, adjust serum biochemical indexes, and affect the intestinal microbial composition of finishing pigs. [ABSTRACT FROM AUTHOR]

The purpose of the study is to evaluate the performance of machine learning models and to propose an interpretable prediction framework for feed material prices. Soybean meal was selected as the representative raw material of feed products. Based on the monthly settlement price data of soybean meal futures from January 2006 to April 2023, BP neural network, GBDT and XGBoost machine learning algorithms were used to conduct training tests, and then Bayesian optimization algorithm was used to adjust the parameters of each model. Finally, the optimal model and SHAP model are selected to analyze the prediction results. The prediction performance of the BO-XGBoost model proposed in this study is significantly better than that of other benchmark models. The MAPE and R2 of the forecast set are 0.03 and 0.892, indicating a high accuracy of the model. The research shows that the model has a good application prospect, and can provide some reference for the decision making of feed-related enterprise managers and relevant departments. [ABSTRACT FROM AUTHOR]

The study was to investigate the effect of different levels of fermented feed on the reproductive performance, nutrient apparent digestibility of sows and the growth performance of piglets. Sixty pregnant sows with similar parity, body weight and expected date of delivery were randomly divided into four groups with 15 replicates per group and one sow per replicate. The sows in control group were fed a basal diet, and the experimental groups were fed a 2.5%, 5.0% and 10.0% fermented feed instead of the basal diet, respectively. The experiment was conducted from 90 days of gestation to 25 days after delivery. The results showed that compared with the control group and 2.5% group, the number of live litters and number of healthy offsprings in the 5.0% group and 10.0% group were significantly increased ( P<0.05), and the backfat loss was significantly reduced ( P<0.05). Compared with the control group, the number of stillbirths, labor stage and oestrus interval of sows in the 5.0% group and 10.0% group were significantly decreased ( P<0.05). The apparent digestibility of dry matter, crude fiber and crude protein of sows in the 5.0% group and 10.0% group were significantly increased ( P<0.05). The levels of total protein, albumin and globulin in the serum of the 5.0% group and 10.0% group were significantly increased ( P<0.05). The final weight and average daily gain of the piglets in the 5.0% group and 10.0% group were significantly higher than those in the control group ( P<0.05), and the diarrhea rate of the piglets in all fermented diet groups was significantly lower than that in the control group ( P<0.05). The experiment indicates that the 5.0%~10.0% fermented feed intake by sows can improve the reproductive performance, nutrient apparent digestibility of sows, growth performance of piglets, and improve some serum biochemical indexes of sows. [ABSTRACT FROM AUTHOR]

The aim of the experiment was to investigate the effect of Taxus polysaccharide on growth performance and immunity of broilers. A total of 180 seven-day-old 817 broilers were randomly divided into six groups, with three replicates per group and 10 chickens per replicate. Chickens in the blank control group (NC) were fed with a basal diet, and the other five groups were low dose of Taxus polysaccharide group (TP-L, 0.5 g/kg), medium dose group (TP-M, 1.0 g/kg), high dose group (TP-H, 2.0 g/kg) and Taxus extract polysaccharide group (TEP, 0.75 g/kg), aureomycin group (CTE, 1 g/kg). The experiment lasted for 14 d. The results showed that dietary supplementation of Taxus polysaccharide had no significant effect on growth performance of broilers (P>0.05). Thymus index of broilers in TP-L group and TP-M group was extremely higher than that in NC group and CTE group (P<0.01). Serum IgG, IgM and IgA content of broilers in TP-M group, TP-H group and TEP group were extremely higher than those in NC group (P<0.01), serum IL-1β content was extremely lower than that in NC group and CTE group (P<0.01), and serum IL-4 content was extremely higher than that in CTE group (P<0.01). The content of IL-1β and IL-6 in duodenal mucosa of TEP group were extremely lower than those in NC group and CTE group (P<0.01). The content of IL-4 in duodenal mucosa of broilers in TP-L group and TP-M group was extremely higher than that in CTE group (P<0.01). The duodenal mucosa sIgA content of TP-L group was significantly higher than that of NC group (P<0.05). The duodenal V/C value of TEP group was extremely higher than that of NC group and CTE group (P<0.01). The study indicates that Taxus polysaccharide can effectively improve the organ index and serum immune index, regulate duodenal mucosal immunity and improve duodenal absorption function, and improve immunity of broilers. Taxus polysaccharide supplemental level of 0.5~1.0 g/kg has better effect. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 intestine is an important organ for digestion and absorption of nutrients as well as playing an immune role in livestock and poultry. The intestinal barrier function is an important internal factor that affects the intestinal health of livestock and poultry. In recent years, nutritional intervention has gradually become a sustainable method for preventing diseases and improving intestinal health in livestock and poultry. Eugenol, as a natural plant extract, has biological activities such as anti-inflammatory, antiviral, and antibacterial effects. The article reviews the improvement of intestinal barrier function by syringic acid and its application in livestock and poultry production, aiming to elucidate the role of syringic acid in improving intestinal health and enhancing production performance in livestock and poultry. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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 Feed Research is the property of Editorial Board of Feed Research 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.)

Cellulase is a kind of compound enzyme system, which can decompose cellulose in feed to improve gastrointestinal absorption capacity of aquatic animals and improve production performance. In recent years, Chinese aquaculture industry is facing a serious problem of feed shortage with the rapid expansion of intensive aquaculture industry. Adding cellulase to feed can improve feed conversion rate, which is an important way to alleviate the increasingly scarce feed resources. The paper reviews the source, composition, nutritional mechanism of cellulase and the application, main problems and development prospects of cellulase in aquaculture, to provide reference for the application of cellulase in aquaculture. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research 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 experiment optimized the extraction process of flavonoids from the branches and leaves of Tamarix ramosissima and determined the oxidation activity. On the basis of single factor and orthogonal test, the optimum technological parameters of ultrasonic extraction of flavonoids were determined, and the total reducibility and DPPH· and OH· scavenging ability of flavonoids were determined. The results showed that under the conditions of ultrasonic power of 100 W, 60% ethanol, 40 °C, ultrasonic for 40 min and three cycles, the average yield of total flavonoids in wild Tamarix ramosissima was 38.727 mg/g, which has a good scavenging ability for DPPH· and OH·. The experiment indicates the optimized process has higher yield of total flavonoids, and the flavonoid has better anti-oxidant ability. [ABSTRACT FROM AUTHOR]

The experiment was to study the effect of different concentrations of coated humic acid sodium instead of zinc oxide on growth performance, serum biochemical indexes and intestinal villi of weaned piglets. One hundred and forty-four 28-day-old 'DurocxLandracexYorkshire' piglets with body weight (7.12±0.10) kg were randomly divided into four groups, with six replicates in each group and six piglets in each replicate. The experiment lasted for 28 d. The piglets were all fed with corn-soybean meal based diet. 1.5 g/kg coated humic acid sodium was added in group A, 3.5 g/kg coated humic acid sodium was added in group B, 2 g/kg zinc oxide was added in group C, and group D was the control group. The results showed that the feed to gain ration of group B was higher than other groups (P>0.05). The serum total antioxidant capacity of group B was significantly higher than other groups (P<0.05). The serum glucose level of group B was significantly higher than other groups (P<0.05). The villus height and the ratio of villus height to crypt depth of group B was extremely higher than other groups (P<0.01). The experiment indicates that adding 3.5 g/kg coated sodium humate in the diet of weaned piglets can effectively replace zinc oxide. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research 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.)