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Animal Nutrition 2024年第2期17卷 408-417页

作者： Qian Lin Xiaodian Tu Xin Li Feiyang Gou Lin Ding zeqing lu Jie Feng Yongfei Ying Caihong Hu College of Animal Sciences Zhejiang University Key Laboratory of Molecular Animal Nutrition (Zhejiang University) Ministry of Education Animal Husbandry Technology Promotion and Breeding Livestock and Poultry Monitoring Station of Zhejiang Province

A proper dietary electrolyte balance(dEB) is essential to ensure optimal growth performance of piglets. In the low-protein diet, this balance may be affected by the reduction of soybean meal and the inclusion of high levels of synthetic amino acids. The objective of this experiment was to evaluate the optimal dEB of low-protein diets and its impact on the growth performance of piglets. A total of 108 piglets(initial age of35 d) were randomly divided into 3 groups with 6 replicates of 6 pigs each as follows: low electrolyte diet(LE group; dEB = 150 milliequivalents [mEq]/kg); medium electrolyte diet(ME group; dEB = 250 m Eq/kg);high electrolyte diet(HE group; d EB = 350 mEq/kg). Results indicated that the LE and HE diet significantly decreased the average daily gain, average daily feed intake, and crude protein digestibility(P ludin and claudin-1) expression(P lutamic acid, and alanine(P luence of the dEB on piglet growth performance and intestinal ***, second-order polynomial(quadratic) regression analysis showed that the optimal dEB of piglets in the low-protein diet was 250 to 265 mEq/kg.

关键词： Low-protein Dietary electrolyte balance Piglet Mammalian target of rapamycin complex 1

Fermented defatted rice bran-derived gut Clostridium butyricum improved the gut barrier function by regulating HIF-1 signaling pathway

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Food Science and Human Wellness 2024年

作者： Weifa Su Zipeng Jiang Tao Gong Man Du Fengqin Wang zeqing lu Mingliang Jin Yizhen Wang Key Laboratory of Molecular Animal Nutrition， Ministry of Education， Zhejiang University Key Laboratory of Animal Nutrition and Feed， Ministry of Agricultural and Rural Affairs， Zhejiang University National Engineering Research Center of Green Feeds and Healthy Livestock Industry， Zhejiang University Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province， Zhejiang University College of Animal Science， Institute of Feed Science， Zhejiang University

Emerging evidence of the beneficial effects of defatted rice bran (DFRB) on gut health has advanced the development of fermented defatted rice bran as a potential functional food. However， less is known about its effects and underlying mechanisms on gut health. In this study， a mouse model together with fecal microbiota transplantation (FMT) was utilized to study the effects and mechanisms of fermented DFRB (FR) on gut barrier function. We found that FR improved the intestinal morphology， gut tight junction proteins， mucin， antimicrobial peptides， and IL-22 and promoted the gut Clostridium butyricum and butyrate. Notably， correlation analysis indicated gut C. butyricum and butyrate were two FR-induced effectors that improved gut health. FMT results suggested that C. butyricum， butyrate， and fecal microbiota from the FR group all reduced PHD2 expression by activating PPAR-γ in the mouse colon. This decrease in gut PHD2 subsequently upregulated the HIF-1α expression， which in turn increased the expression of its targeted downstream tight junction proteins， mucin and antimicrobial peptides， and colonic IL-22 secretion. Overall， FR-derived C. butyricum and butyrate might improve gut barrier function through the HIF-1 signaling pathway， which provides a reference for the application of fermented DFRB as a potential functional food for improving of gut barrier function.

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饲粮电解质平衡的生物学作用及其在畜禽生产中的应用研究进展

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动物营养学报 2024年第7期36卷 4183-4190页

作者：沈雨甜付阳冯杰路则庆浙江大学动物科学学院绿色饲料与健康养殖国家工程研究中心农业农村部华东动物营养与饲料重点实验室浙江省饲料与动物营养重点实验室杭州310058

电解质是指在水溶液中能够解离成带电离子的化合物,其主要组成元素包括钠(Na^(+))、钾(K^(+))、氯(Cl^(-))、钙(Ca^(2+))、镁(Mg^(2+))等离子。饲粮电解质平衡(dEB)是指在畜禽饲粮中,不同电解质或正、负离子的含量和比例均达到适宜范围... 详细信息

电解质是指在水溶液中能够解离成带电离子的化合物,其主要组成元素包括钠(Na^(+))、钾(K^(+))、氯(Cl^(-))、钙(Ca^(2+))、镁(Mg^(2+))等离子。饲粮电解质平衡(dEB)是指在畜禽饲粮中,不同电解质或正、负离子的含量和比例均达到适宜范围,以满足动物的生理需求并维持其正常生理功能。作为饲粮配方设计的关键要素之一,适当的dEB值可以有效提高饲粮营养物质利用率,改善动物健康状况,促进生长发育,对提高养殖业的经济和社会效益具有重要意义。因此,本文旨在对dEB的生物学作用及其在畜禽生产中的应用研究进展进行综述,以期为养殖业的可持续发展提供参考。

关键词：畜禽电解质平衡生产性能营养代谢机体健康

Effects of long-chain fatty acid supplementation on the growth performance of grower and finisher pigs: a meta-analysis

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Journal of Animal Science and Biotechnology 2019年第4期10卷 1037-1048页

作者： Zhi Li Bocheng Xu zeqing lu Yizhen Wang National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control Key Laboratory of Animal Nutrition and Feed of Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province Institute of Feed Science Zhejiang University

Background: Supplementation of feed with long-chain fatty acids(LCFAs) during the grower and finisher phases has long been discussed as a growth promotion strategy in pigs, but its effects are inconsistent. The purpose of our study was to comprehensively evaluate its effects on the growth performance based on the average daily gain(ADG), average daily feed intake(ADFI) and gain: feed(G:F) ratio and to unveil the roles of the basal diet, LCFA concentration and LCFA ***: We searched the Pub Med and Web of Science databases(articles published from Jan 1 st, 2000, to Sep 30 th,2018;restricted to English) and compared LCFA-supplemented diets with control diets. We retrieved 2346 studies, 18 of which(1314 pigs, 26 records) were eligible for our analysis. We used a random-effects model to calculate the weighted mean differences(WMDs) and 95% confidence intervals(CIs). LCFA supplementation in the grower-finisher phase improved the ADG(WMD = 41.74 g/d, 95% CI: 8.81 to 74.66, P = 0.013) and G:F ratio(WMD = 0.019, 95% CI: 0.006 to 0.032, P = 0.003). For supplementation solely in the finisher phase, we found a similar performance in the ADG(WMD = 39.93 g/d, 95% CI: 26.48 to 53.38, P < 0.001) and G:F ratio(WMD = 0.019, 95% CI: 0.006 to 0.032, P < 0.001) but a reduction in the ADFI(WMD =-83.863 g/d, 95% CI:-156.157 to-11.569, P = 0.023). Specifically, approximately 5%LCFA supplementation in the finisher phase had significant effects on the ADG(WMD = 51.385 g/d, 95% CI: 35.816 to66.954, P < 0.001), ADFI(WMD =-102.869 g/d, 95% CI:-189.236 to-16.502, P = 0.02) and G:F ratio(WMD = 0.028, 95%CI: 0.018 to 0.039, P < 0.001), whereas a concentration of approximately 1% exhibited no ***: Overall, regardless of the basal diet and saturation, LCFA supplementation greatly improves the growth performance of grower and finisher pigs, primarily by increasing the energy density.

关键词： Energy density Finisher pig Grower pig Growth performance Long-chain fatty acid Meta-analysis Production performance

Solid-state fermentation of corn-soybean meal mixed feed with Bacillus subtilis and Enterococcus faecium for degrading antinutritional factors and enhancing nutritional value

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Journal of Animal Science and Biotechnology 2017年第4期8卷 925-933页

作者： Changyou Shi Yu Zhang zeqing lu Yizhen Wang Institute of Feed Science College of Animal ScienceZhejiang UniversityHangzhouZhejiang Province 310058People’s Republic of China

Background: Corn and soybean meal(SBM) are two of the most common feed ingredients used in pig ***, a variety of antinutritional factors(ANFs) present in corn and SBM can interfere with the bioavailability of nutrients and have negative health effects on the pigs. In the present study, two-stage fermentation using Bacillus subtilis followed by Enterococcus faecium was carried out to degrade ANFs and improve the nutritional quality of corn and SBM mixed feed. Furthermore, the microbial composition and in vitro nutrient digestibility of inoculated mixed feed were determined and compared those of the uninoculated ***: During the fermentation process, B. subtilis and lactic acid bacteria(LAB) were the main dominant bacteria in the solid-state fermented inoculated feed, and fermentation produced a large amount of lactic acid(170 mmo L/kg),which resulted in a lower pH(5.0 vs. 6.4) than the fermented uninoculated feed. The amounts of soybean antigenic proteins(β-conglycinin and glycinin) in mixed feed were significantly decreased after first-stage fermentation with B. subtilis. Inoculated mixed feed following two-stage fermentation contained greater concentratioin of crude protein(CP), ash and total phosphorus(P) compared to uninoculated feed, whereas the concentrations of neutral detergent fiber(NDF), hemicellulose and phytate P in fermendted inoculated feed declined(P luble protein(TCA-SP), particularly that of small peptides and free amino acids(AA), increased 6.5 fold following two-stage fermentation. There was no difference in the total AA content between fermented inoculated and uninoculated feed. However, aromatic AAs(Phe and Tyr) and Lys in inoculated feed increased, and some polar AAs, including Arg, Asp, and Glu, decreased compared with the uninoculated feed. In vitro dry matter and CP digestibility of inoculated feed improved(P < 0.05) compared with t

关键词： Antinutritional factors (ANFs) In vitro digestibility Mixed feed Nutritional value Two-stage fermentation

Methylmercury chloride damage to the adult rat hippocampus cannot be detected by proton magnetic resonance spectroscopy

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Neural Regeneration Research 2014年第17期9卷 1616-1620页

作者： Zhiyan lu Jinwei Wu Guangyuan Cheng Jianying Tian zeqing lu Yongyi Bi Department of Radiology Zhongnan Hospital of Wuhan University Department of Radiology Hainan Provincial Nongken Hospital Department of Anatomy Ningxia Medical University School of Public Health University of Minnesota School of Public Health Wuhan University

Previous studies have found that methylmercury can damage hippocampal neurons and accord- ingly cause cognitive dysfunction. However, a non-invasive, safe and accurate detection method for detecting hippocampal injury has yet to be developed. This study aimed to detect methylmercury-induced damage on hippocampal tissue using proton magnetic resonance spectroscopy. Rats were given a subcutaneous injection of 4 and 2 mg/kg methylmercury into the neck for 50 consecutive days. Water maze and pathology tests confirmed that cognitive function had been impaired and that the ultrastructure of hippocampal tissue was altered after injection. The results of proton magnetic resonance spectroscopy revealed that the nitrogen-acetyl aspartate/ creatine, choline complex/creatine and myoinositol/creatine ratio in rat hippocampal tissue were unchanged. Therefore, proton magnetic resonance spectroscopy can not be used to determine structural damage in the adult rat hippocampus caused by methylmercury chloride.

关键词： nerve regeneration proton magnetic resonance spectroscopy methylmercury chloride cognitive dysfunction hippocampus behavior pathology NSFC grant neural regeneration

Effects of starch and gelatin encapsulated vitamin A on growth performance,immune status and antioxidant capacity in weaned piglets

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Animal Nutrition 2020年第2期6卷 130-133页

作者： Yuhan Hu Lin Zhang Yu Zhang Haitao Xiong Fengqin Wang Yizhen Wang zeqing lu National Engineering Laboratory of Bio-feed Safety and Pollution Prevention Key Laboratory of Animal Feed and Nutrition of Zhejiang ProvinceKey Laboratory of Animal Nutrition and Feed Science(Eastern of China)Ministry of AgricultureInstitute of Feed ScienceZhejiang UniversityHangzhou 310058China

To evaluate the effects of gelatin and starch encapsulated vitamin A on growth performance,immune status and antioxidant capacity in weaned piglets,a total of 96 weaned piglets(body weight=9.11±0.03 kg,30-d-old)were randomly allotted to 3 treatments with 4 replications of 8 piglets *** 3 treatments were control diet(basal diet without addition of vitamin A),gelatin vitamin A diet(basal diet+13,500 IU/kg gelatin encapsulated vitamin A),and starch vitamin A diet(basal diet+13,500 IU/kg starch encapsulated vitamin A),*** results showed that piglets fed starch vitamin A diet had significantly higher final body weight and average daily gain compared to those in control and gelatin vitamin A groups(Plutathione peroxidase(GSH-Px)activity were significantly increased by gelatin vitamin A diet on d 21 and starch vitamin A diet on d 42,respectively(P<0.05).These results demonstrated that dietary supple mentation of vitamin A could improve immune function and antioxidant capacity in weaned piglets,and starch vitamin A is better than gelatin vitamin A,especially in promoting the growth performance of piglets.

关键词： Starch encapsulated vitamin A Gelatin encapsulated vitamin A Antioxidant capacity Growth performance Immunity Piglets

Co-fermented defatted rice bran alters gut microbiota and improves growth performance,antioxidant capacity,immune status and intestinal permeability of finishing pigs

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Animal Nutrition 2022年第4期11卷 413-424页

作者： Weifa Su Zipeng Jiang Cheng Wang Yu Zhang Tao Gong Fengqin Wang Mingliang Jin Yizhen Wang zeqing lu Key Laboratory of Molecular Animal Nutrition Ministry of EducationZhejiang University866 Yuhang Tang RoadHangzhouZhejiang 310058China Key Laboratory of Animal Nutrition and Feed Ministry of AgricultureZhejiang University866 Yuhang Tang RoadHangzhouZhejiang 310058China National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control Zhejiang University866 Yuhang Tang RoadHangzhouZhejiang 310058China Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province Zhejiang University866 Yuhang Tang RoadHangzhouZhejiang 310058China College of Animal Science Institute of Feed ScienceZhejiang University866 Yuhang Tang RoadHangzhouZhejiang 310058China

Based on preparation of co-fermented defatted rice bran(DFRB)using Bacillus subtilis,Saccharomyces cerevisiae,Lactobacillus plantarum and phytase,the present study aimed to evaluate the effects of cofermented DFRB on growth performance,antioxidant capacity,immune status,gut microbiota and permeability in finishing *** finishing pigs(85.30±0.97 kg)were randomly assigned to 3treatments(3 replicates/treatment)with a basal diet(Ctrl),a basal diet supplemented with 10% unfermented DFRB(UFR),and a basal diet supplemented with 10% fermented DFRB(FR)for 30 *** revealed that the diet supplemented with FR notably(Plus *** analyses indicated dietary fiber in FR was associated with improvements in immune status,intestinal permeability and the level of butyrate-producing microbe ***,which was also verified by the in vitro fermentation *** findings provided an experimental and theoretical basis for the application of fermented DFRB in finishing pigs.

关键词： Co-fermented defatted rice bran Finishing pig Growth performance Gut microbiota Gut permeability Immune status

Fermented mixed feed alters growth performance,carcass traits,meat quality and muscle fatty acid and amino acid profiles in finishing pigs

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Animal Nutrition 2023年第1期12卷 87-95页

作者： Shiqi Liu Man Du Yuang Tu Wenjing You Wentao Chen Guoliang Liu Junyue Li Yizhen Wang zeqing lu Tenghao Wang Tizhong Shan College of Animal Sciences Zhejiang UniversityHangzhouChina Key Laboratory of Molecular Animal Nutrition(Zhejiang University) Ministry of EducationHangzhouChina Key Laboratory of Animal Nutrition and Feed Science(Eastern of China) Ministry of Agriculture and Rural AffairsHangzhouChina Key Laboratory of Animal Feed and Nutrition of Zhejiang Province HangzhouChina Zhejiang Qinglian Food Co Ltd JiaxingChina

This study was conducted to investigate the effects of fermented mixed feed(FMF)on growth performance,carcass traits,meat quality,muscle amino acid and fatty acid composition and mRNA expression levels of genes related to lipid metabolism in finishing *** the present study,144 finishing pigs(Duroc×Berkshire×Jiaxing Black)were randomly allocated to 3 dietary treatments with 4 replicate pens per group and 12 pigs per *** dietary treatments included a basal diet(CON),a basal diet+5%FMF and a basal diet+10%*** experiment lasted 38 d after 4 d of *** results showed that 5%and 10%FMF significantly increased the average daily gain(ADG)of the females but not the males(Plues,while it decreased the shear force relative to CON(Pluding CEBPα,PPARγ,SREBP1 and FABP4,and upregulated the expression of unsaturated fatty acid synthesis(ACAA1 and FADS2).Together,our results suggest that 10%FMF dietary supplementation improved the female pigs’growth performance,improved the meat quality and altered the profiles of muscle fatty acids and amino acids in finishing *** study provides a reference for the production of high-quality pork.

关键词： Fermented mixed feed Growth performance Meat quality Amino acid profile Fatty acid composition Finishing pig

Effects of casein glycomacropeptide supplementation on growth performance,intestinal morphology, intestinal barrier permeability and inflammatory responses in Escherichia coli K88 challenged piglets

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Animal Nutrition 2015年第2期1卷 54-59页

作者： Yili Rong zeqing lu Haiwen Zhang Lin Zhang Deguang Song Yizhen Wang Key Laboratory of Animal Nutrition and Feed Science Ministry of Agriculture Zhejiang Provincial Laboratory of Feed and Animal Nutrition Institute of Feed Science Zhejiang University

Casein glycomacropeptide(CGMP) is a bioactive peptide derived from milk with multiple functions. This study was aimed at evaluating the effects of CGMP as a potential feed additive on growth performance,intestinal morphology, intestinal barrier permeability and inflammatory responses of Escherichia coli K88(E. coli K88) challenged piglets. Eighteen weaning piglets were randomly assigned to three *** group and K88 challenged group received a basal diet, and CGMP treated group received the basal diet supplemented with 1% of CGMP powder. The trail lasted for 12 days, K88 was orally administered to the piglets of K88 challenged group and CGMP treated group on days 8-10. The results showed that the diet containing 1% CGMP significantly alleviated the decrease in average daily gain(P 0.05) and barrier permeability damage(P lusion, CGMP supplementation in the diet protected the weaning piglets against E. coli K88 infection.

关键词： Casein glycomacropeptide Weaning piglets Escherichia coli K88 Growth performance