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补充酵母培养肉牛食用基于料的饮食

Autumn T Pickett¹, Reinaldo F Cooke¹, Izadora S de Souza¹

¹Department of Animal Science - Texas A&M University, College Station, TX 77843, USA.

Translational animal science

|September 10, 2025

概括

用酵母培养 (YC) 补充牛肉公牛改善了营养利用和挥发性脂肪酸生产. 这提高了饮食的消化能力,导致平均每日取增加,并改善了基于料的食牛的取料比率.

科学领域:

动物科学动物科学
类动物营养类动物营养
微生物学微生物学

背景情况:

酵母培养 (YC) 补充正在探索,以调节乳头功能并提高牛的料效率.
了解YC对食发酵,微生物群和营养素消化能力的影响对于优化肉牛饮食至关重要.

研究的目的:

为了评估酵母培养 (YC;*Saccharomyces cerevisiae*) 补充剂对食原体降解性,发酵和牛的微生物群的影响,牛食以料为基础的饮食.
为了确定对YC的剂量依赖性反应,在1.5g/100kg体重 (BW) 和3.0g/100kgBW.

主要方法:

使用了复制的3x3拉丁方形设计,使用了12只头的小牛.
雌牛每天要么没有YC (CON),1.5克YC/100公斤BW (YC1.5),或3.0克YC/100公斤BW (YC3.0) 与缩剂混合.
在现场评估了干物 (DM) 和中性清洁剂纤维 (NDF) 的消失,液挥发性脂肪酸 (VFA),微生物群,明显的全通道消化能力 (aTTD) 和生长性能.

主要成果:

YC补充物线性地增加了小 propionate,iso-butyrate,并倾向于增加乙酸和总VFA度.
*Succiniclasticum*的相对丰度线性下降,而香农多样性指数随着YC的纳入线性增加.
YC线性增强的食者DM和NDF消失率,粉和NDF的aTTD,平均每日增益和增益:料 (G:F).

结论:

酵母培养补充剂通过增加VFA产量和改变微生物种群,线性地改善了反体发酵.
在以料为基础的饮食养的牛肉母牛中,YC增强了营养利用,包括粉和NDF消化能力.
以1.5或3.0g/100kgBW补充YC对生长表现产生了积极的影响,这表明料效率有所改善.

关键词:

牛肉小牛牛犊牛犊料料是一种料.罗马尼亚 - 罗马尼亚酵母培养文化的酵母

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