补充基于Bacillus的直接养微生物对ex vivo发酵特征和哺乳期霍尔斯坦奶牛的表现的影响

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Alex Bach¹, Miguel Escartín², Charlie Culley³

¹Department of Animal Science, University of Lleida, Lleida E-25198, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona 08010, Spain.

Journal of dairy science

|December 15, 2025

概括

补充乳牛以Bacillus为基础的直接养微生物 (DFM) 改善了反动物发酵,提高了牛奶生产和料效率. 这种Bacillus DFM提供了一个可行的策略来提高奶牛的生产力.

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:

直接养的微生物 (DFM) 用于调节乳头功能.
基于细菌的DFM已经显示出改善动物表现的潜力.
了解Bacillus DFM对ex vivo发酵和体内性能的影响对于乳制品营养至关重要.

研究的目的:

为了评估基于Bacillus的DFM对ex vivo黄肠发酵特征的影响.
评估基于Bacillus的DFM补充剂对哺乳乳奶牛表现的影响,包括干物摄入量,牛奶产量和料效率.

主要方法:

进行了三项实验,涉及经囊和哺乳期霍尔斯坦牛.
测量了ex vivo发酵参数 (气体,VFA,氨).
在体内研究评估了几周的干物质摄入量,牛奶产量,牛奶成分和料效率.

主要成果:

补充Bacillus DFM增加了总的VFA,丁酸盐,异酸盐,酸盐和氨酸-N,同时减少了酸盐和酸盐的比例ex vivo.
气体产量增加了,但没有影响甲 (CH4) 产量.
在体内,Bacillus DFM提高了哺乳乳奶牛的料效率和牛奶产量.

结论:

基于细菌的DFM会积极改变反动物发酵模式.
补充基于Bacillus的DFM可以提高奶牛的生产力和料效率.
基于细菌的DFM代表了改善奶牛表现的可行策略.

关键词:

细菌种类. 细菌种类.奶牛牛奶牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛发酵发酵发酵发酵牛奶的成分牛奶的成分牛奶产量牛奶产量

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