Benefits of tributyrin on growth performance,gastrointestinal tract development,ruminal bacteria and volatile fatty acid formation of weaned Small-Tailed Han lambs  

作　　者：Zhiwei Li Xueer Wang Wei Wang Ran An Yaxin Wang Qingchang Ren Jingjing Xuan 

机构地区：[1]College of Animal Science,Anhui Science and Technology University,Fengyang,233100,China [2]College of Animal Science and Technology,Tarim University,Alae,843300,China [3]Anhui Province Key Laboratory of Animal Nutritional Regulation and Health,Anhui Science and Technology University,Fengyang,233100,China [4]School of Finance and Economics,Anhui Science and Technology University,Bengbu,233030,China

出　　处：《Animal Nutrition》2023年第4期187-196,共10页动物营养（英文版）

基　　金：The authors gratefully acknowledge the financial support of the Natural Science Foundation of Anhui Provincial Science and Technology Department(project no.2108085MC112);2022 Excellent Young Talent Support Program in colleges and universities of The Working Committee of The CPC Anhui Provincial Committee Education(project no.gxyq2022054);2021 Rural Revitalization Projects of Guzhen County Bureau of Science and Technology(project no.2021GZXCZXKJXM02);talent development program“Young and Middle-aged Subject Leaders Training Object”from personnel department of Anhui Science and Technology University.

摘　　要：This study aimed to determine the effects of tributyrin on growth performance,gastrointestinal tract development,ruminal bacteria and volatile fatty acid(VFA)formation.Thirty healthy weaned SmallTailed Han female lambs at 3 months old with BW 27.5±4.1 kg(mean±SD)were randomly assigned to five groups of six lambs each,and each group received tributyrin at 0,0.5,1.0,2.0 and 4.0 g/kg in feed.Weights were measured before the start and end of the study.After 15 d adaptation,DMI,feed,faeces and urine were recorded every week.Lambs were sacrificed at d 75.Compared to lambs fed no tributyrin,lambs fed 4.0 g/kg tributyrin had higher average daily BW gain(P=0.04)and DMI(P<0.01).Tributyrin reduced nitrogen(P<0.01),Ca(P<0.01)and P(P<0.01)losses derived from faeces and urine.The mostly important,tributyrin increased dorsal sac thickness(P<0.01),papillae length(P=0.04)and width(P<0.01),ventral sac papillae length(P<0.01)and width(P<0.01),caudodorsal blind sac thickness(P=0.02),papillae length(P<0.01)and width(P<0.01).Furthermore,tributyrin increased thicknesses of both the duodenum(P<0.01)and ileum(P=0.01),and villus heights of the duodenum(P=0.01),ileum(P<0.01),jejunum(P<0.01)and caecum(P=0.02),but tributyrin decreased duodenal(P<0.01)and caecal crypt depths(P<0.01).Tributyrin reduced rumen pH(P<0.01)while promoting total VFA concentration(P<0.01).Tributyrin improved the structure of rumen bacteria by enhancing Clostridium(P=0.04),Butyrivibrio(P<0.01),Streptococcus(P=0.04),Prevotella(P=0.04),Ruminobacter(P=0.02)and Fibrobacter(P=0.03).In conclusion,tributyrin could stimulate gastrointestinal tract development by enhancing colonization of rumen VFA-producing bacteria,and dietary supplementation of tributyrin at 4.0 g/kg of DM was recommended for the weaned lambs.

关 键 词：Tributyrin Bacteria Gastrointestinal tract Growth Weaned lamb 

分 类 号：S826.5[农业科学—畜牧学]