棕酸,牛脂酸和油酸的供应改变了皮纤维的消化能力和微生物组成
Austin Sears1, Fernanda Hentz2, Jonas de Souza3
1Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT 53706.
Journal of dairy science
|September 30, 2023
概括
棕酸补充剂通过促进有益细菌改善了反动物的纤维消化. 其他脂肪酸,如酸和油酸,对纤维消化或细菌生长没有表现出类似的积极影响.
科学领域:
- 食动物的营养
- 微生物生态学 微生物生态学
- 动物科学动物科学
背景情况:
- 以前认为饮食脂肪补充会损害反动物的纤维消化.
- 新兴研究表明,特定的脂肪酸可能会对纤维消化能力产生积极影响.
- 棕酸,酸和油性酸是细菌细胞膜的关键组成部分.
研究的目的:
- 研究饮食中的棕酸,酸和油酸对纤维消化的影响.
- 分析转细菌膜脂肪酸特征,微生物生长和社区组成的变化.
- 为了测试这些脂肪酸通过融入细菌膜来增强纤维消化细菌的假设.
主要方法:
- 八个单流连续培养发酵器被用于复制的4x4拉丁方形设计.
- 饮食包括对照 (CON) 和补充棕酸 (PA),牛油酸 (SA) 或油酸 (OA) 的治疗,含量为DM的1.5%.
- 分析了纤维消化能力,细菌膜脂肪酸成分,微生物生长和社区结构.
主要成果:
- 与CON相比,棕酸 (PA) 在体外纤维消化能力增加了6%;油酸 (OA) 降低了8%;酸 (SA) 没有影响.
- PA改变了细菌群体,增强了纤维消化群体,而SA和OA没有.
- 亚酸倾向于增加细菌生长和改变特定的膜脂肪酸 (前列C13:0,前列C15:0),而OA改变了C18:1 cis-9和C18:2 cis-9,cis-12.
结论:
- 棕酸补充剂通过调节细菌脂肪酸代谢来支持食纤维的消化.
- 这种调节导致细菌群体组成的变化,有利于纤维降解细菌.
- 这项研究提供了第一个证据,将棕酸与通过特定的微生物转移增强头纤维消化联系起来.
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