中国农业科技导报2025，Vol.27Issue(3)：83-94,12.DOI:10.13304/j.nykjdb.2023.0667
黄芪饲料添加剂对羔羊生长性能、血清Ig和瘤胃发酵功能及微生物菌群特征的影响
Effects of Astragalus Feed Additive on Growth Performance,Serum Ig,Rumen Fermentation and Microbiota of Lambs
摘要
Abstract
To investigate the effects of Astragalus additive on immunity,rumen fermentation function and rumen microbiota structure of early weaned lambs,30 healthy early weaned lambs(45 d)with similar body weight(14.63±1.22 kg)were selected for feeding experiment.The control group was fed the basal diet,and the Astragalus group was fed the basal diet supplemented with 0.3%Astragalus additive.After the experiment,the body weight,serum immunoglobulin(Ig)content,rumen microbiota characteristics and fermentation parameters of lambs were determined and analyzed.The results showed that the daily gain of lambs in Astragalus group was higher than that in control group,but the difference was not significant.IgA and IgM contents of serum in Astragalus group were significantly higher than those in control group.Rumen volatile fatty acids(VFAs)contents in Astragalus group were significantly higher than those in control group.Among VFAs,the contents of acetic acid and butyric acid in Astragalus group were extremely significant difference with those in control group.And ammonia nitrogen(NH3-N)content in Astragalus group was also extremely significantly higher than that in control group.Gastric microbial 16S rRNA analysis showed that there were significant differences between Astragalus group and control group.At the phylum level,the relative abundance of Bacteroidetes in Astragalus group was extremely significantly higher than that in control group,and the relative abundance of Firmicutes in the Astragalus group was extremely significantly lower than that in control group.At the genus level,the relative abundances of Prevotella and Succiniclasticum in Astragalus group were extremely significantly higher than those in control group.Microbial gene and function prediction results showed that the pathways of energy metabolism,glycan biosynthesis and metabolism were significantly enriched in Astragalus group.Correlation analysis showed that there were significant correlations between rumen microbiota and fermentation products VFAs and Ig.Therefore,Astragalus as a feed additive could enhance the immunity of lambs,improve the structure of rumen microbiota,increase rumen fermentation capacity,and alleviate the stress response of early weaned lambs.关键词
羔羊/黄芪添加剂/瘤胃微生物/挥发性脂肪酸/相关性分析Key words
lamb/Astragalus additive/rumen microbiota/volatile fatty acids/correlation analysis分类
畜牧业引用本文复制引用
邵鹏阳,沙玉柱,刘秀,陈国顺,朱才业,王继卿,王翻兄,陈小伟,杨文鑫..黄芪饲料添加剂对羔羊生长性能、血清Ig和瘤胃发酵功能及微生物菌群特征的影响[J].中国农业科技导报,2025,27(3):83-94,12.基金项目
国家自然科学基金项目(32260820) （32260820）
甘肃农业大学科技创新基金项目(GAU-QDFC-2022-06) （GAU-QDFC-2022-06）
甘肃农业大学学科团队项目(GAU-XKTD-2022-21) （GAU-XKTD-2022-21）
甘肃海智计划示范项目(GSHZSF2023-01). （GSHZSF2023-01）
