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- Title
暖季补饲矿物质盐砖对放牧牦牛瘤胃发酵 和微生物区系的影响.
- Authors
杨得玉; 黄文植; 薛 斌; 张晓卫; 崔占鸿; 冯宇哲
- Abstract
In order to explore the effects of supplementation of mineral salt bricks in warm season on rumen fermentation and microflora community of grazing yaks, a total of twelve 2.5-year-old male yaks with similar body weight were selected and randomly divided into two treatment groups with six replicates in each group. The control group was pure grazing, and the salt brick group was fed with grazing + supplementary feeding of mineral salt bricks. The results show that: the yields of acetic acid, butyric acid, isovaleric acid, valeric acid, total volatile fatty acids and ammonia nitrogen in the rumen of yaks in the salt brick group were significantly higher than those in the control group (P<0.05), but there was no significant difference in pH between the control group and the salt brick group on the 30th day of the experiment (P> 0.05). On the 60th and 90th day of the experiment, the pH of the salt brick group was significantly lower than that of the control group (P<0.05). Supplementation of mineral salt bricks could significantly reduce the relative abundance of Metha⁃ nobrevibacter, Christenellaceae, Christensenellaceae R-7 and other bacteria in the rumen of yaks (P< 0.05). It significantly increased the relative abundance of Proteobacteria, Actinobacteria, Rhodobacteraceae, Cellulomonadaceae (P<0.05). In summary, supplementation of mineral salt bricks in the warm season can change the activity of rumen microbial community in yaks, promote rumen fermentation, improve the production performance of yak.
- Subjects
VALERIC acid; BUTYRIC acid; YAK; ACETIC acid; MICROBIAL communities; VEGETABLE oils
- Publication
Feed Industry, 2023, Vol 44, Issue 21, p78
- ISSN
1001-991X
- Publication type
Article
- DOI
10.13302/j.cnki.fi.2023.21.013