在料区结束阶段,料效率不同的安格斯牛体内微生物群差异在料区结束阶段
Mia N Carmichael1, Madison M Dycus1, Jeferson M Lourenco1
1Department of Animal and Dairy Science, University of Georgia, Athens, GA 30602, USA.
Microorganisms
|March 28, 2024
概括
牛的料效率与反动物微生物有关. 效率较低的牛有更多的甲产生微生物,浪费能量. 提高牛的料效率需要了解这些微生物的变化.
科学领域:
- 动物科学动物科学
- 微生物学 微生物学
- 类动物营养 类动物营养
背景情况:
- 牛的料效率对于经济可行性至关重要,因为料成本占生产成本的很大一部分.
- 动物微生物群体在将料转化为肉类和牛奶等动物产品方面发挥着关键作用.
研究的目的:
- 研究牛的料效率与它们的反动物微生物群落的组成之间的关系.
- 确定与养场牛的高和低料效率相关的特定微生物种群.
主要方法:
- 65只安格斯牛在82天的最后饮食中被养,测量了干物摄入量 (DMI),平均每日摄入量 (ADG) 和剩余料摄入量 (RFI).
- 根据RFI,Steers被分为高效率 (低RFI) 和低效率 (高RFI) 的组.
- 采集了液样品,量化了挥发性脂肪酸 (VFA),并对微生物DNA进行了测序 (16S rRNA基因),以分析社区组成.
主要成果:
- 虽然ADG没有差异,但高效率牛的DMI和RFI较低.
- 效率较低的牛表现出更高的甲原体的相对丰度,特别是 * Methanobrevibacter * 和 * Methanosphaera *.
- 有效的牛在养期间增加了Ruminococcaceae的相对丰度.
结论:
- 牛的微生物成分在牛群之间有所不同,料效率各不相同.
- 在效率较低的方向盘中,甲的丰富度增加可能会导致更大的能量损失,如甲.
- 向反动物微生物可以提供一种提高牛畜生产料效率的策略.
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