动物营养学报2026，Vol.38Issue(3)：2056-2067,12.DOI:10.12418/CJAN2026.165
饲粮不同淀粉水平对牦牛生长性能及粪便菌群结构的影响
Effects of Dietary Different Starch Levels on Growth Performance and Fecal Microbiota Structure of Yaks
摘要
Abstract
This experiment aimed to investigate the effects of dietary different starch levels on growth perform-ance and fecal microbiota structure of yaks.Thirty healthy 3-year-old male yaks with similar body weight[(138±12)kg]were randomly divided into 3 groups with 10 yaks in each group.The dietary starch levels of 3 groups were 24%(LL group),27%(ML group)and 30%(HL group),respectively.The pre-experimen-tal period lasted for 10 days,and the experimental period lasted for 60 days.The results showed as follows:1)there were no significant differences in the final body weight and average daily gain of yaks among all groups(P＞0.05),but the final body weight and average daily gain of ML group were the highest.2)The Chao1 in-dex,Observed_features index,Shannon index and Simpson index of LL group were extremely significantly higher than those of ML group and HL group(P＜0.01).3)At the phylum level,the relative abundances of Firmicutes and Bacteroidota in feces of ML group were the highest,which were 63.76%and 32.04%,respec-tively;the fecal Firmicutes relative abundance of ML group was significantly higher than that of HL group(P＜0.05),and the fecal Proteobacteria relative abundance of HL group was extremely significantly higher than of LL group and ML group(P＜0.01).At the genus level,the fecal UCG-005 relative abundance of ML group was the highest,which was 31.75%;the fecal UCG-005 relative abundances of LL group and HL group were 28.83%and 7.91%,respectively;the fecal potential pathogens such as Escherichia_Shigella relative abun-dance of HL group was higher.In conclusion,the dietary starch level influences the fecal microbiota diversity of yak by regulating the gut microbiota structure.Compare with the 24%and 30%starch levels,the 27%starch level is conducive to improving the growth performance of yaks,and the fecal microbiota diversity of yaks is moderate,with a higher relative abundance of beneficial bacteria,and no pathogenic bacteria present,making it more suitable for the intestinal tract of yaks.[Chinese Journal of Animal Nutrition,2026,38(3):2056-2067]关键词
牦牛/淀粉水平/生长性能/粪便菌群/16S rDNAKey words
yaks/starch level/growth performance/fecal microbiota/16S rDNA分类
农业科技引用本文复制引用
李秋月,王书祥,刘书杰,程晨旭,张曼,戴东文,申迪,杨英魁,柴沙驼,吕佳颖,王迅..饲粮不同淀粉水平对牦牛生长性能及粪便菌群结构的影响[J].动物营养学报,2026,38(3):2056-2067,12.基金项目
舍饲牦牛健康高效养殖与牦牛肉品质调控技术研究与示范(2025-NK-128) （2025-NK-128）
