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Rumen bacteria and meat fatty acid composition of Sunit sheep reared under different feeding regimens in China
Journal of the Science of Food and Agriculture ( IF 3.3 ) Pub Date : 2020-09-15 , DOI: 10.1002/jsfa.10720 Bohui Wang 1, 2 , Yulong Luo 1 , Yu Wang 1 , Debao Wang 1 , Yanru Hou 1 , Duo Yao 1 , Jianjun Tian 1 , Ye Jin 1
Journal of the Science of Food and Agriculture ( IF 3.3 ) Pub Date : 2020-09-15 , DOI: 10.1002/jsfa.10720 Bohui Wang 1, 2 , Yulong Luo 1 , Yu Wang 1 , Debao Wang 1 , Yanru Hou 1 , Duo Yao 1 , Jianjun Tian 1 , Ye Jin 1
Affiliation
BACKGROUND
Rumen bacteria play a critical role in feed degradation and productivity. This study evaluated the impact of feeding regimen on the rumen microbial populations and fatty acid composition of the meat of sheep. Twenty-four Sunit sheep were raised on a grass pasture from birth to 9 months of age, at which time they were randomly divided into two feeding groups: pasture feeding (PF) and barn feeding (BF). Sheep in the PF group were allowed to graze freely on wild grassland for 3 months. Sheep in the BF group were confined for 3 months to a dry barn, in which they roamed freely with corn straw and corn. RESULTS
Sheep in the PF group had greater rumen bacteria diversity. The relative abundances of the genera Butyrivibrio_2, Saccharofermentans and Succiniclasticum were increased, and that of the genus RC9_gut_group was decreased, in the PF compared to the BF sheep. The n-3 polyunsaturated fatty acid contents were greater in meat from PF sheep than from BF sheep. In addition, the α-linolenic acid (C18:3 n-3, ALA) and conjugated linoleic acid (CLA) contents were positively correlated with the abundance of Butyrivibrio_2. CONCLUSION
Grazing may improve the diversity of rumen bacteria and increase the proportion of ALA and CLA in sheep meat. This article is protected by copyright. All rights reserved.
更新日期：2020-09-15
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