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评估用Saccharomyces cerevisiae发酵衍生后生物补充剂对肉牛甲生产,反动物发酵和营养利用的影响
Ignacio Fernandez-Marenchino1, Liza Garcia1, Araceli Maderal1
1North Florida Research and Education Center, IFAS, University of Florida, Marianna, FL 32446, USA.
Journal of animal science
|July 20, 2025
概括
补充牛肉牛用Saccharomyces cerevisiae发酵衍生后生物 (SCFP) 改变了体内食发酵和改善了营养消化能力. 补充SCFP并没有影响ex vivo发酵参数,但在体内增加了酸盐与酸盐的比率.
科学领域:
- 动物的营养和新陈代谢
- 动物微生物学和发酵
背景情况:
- 酵母发酵产品正在被探索作为料添加剂,以提高牛的性能和减少甲排放.
- 由Saccharomyces cerevisiae发酵衍生的后生物体代表了调节功能的一种新方法.
研究的目的:
- 评估Saccharomyces cerevisiae发酵衍生后生物 (SCFP) 对高谷物饮食的牛肉的食发酵,甲生产和营养利用的影响.
- 评估SCFP补充剂对关键反动物参数和营养物质消化能力的ex vivo和in vivo影响.
主要方法:
- 一项交叉设计研究涉及六只经过小吃管的安格斯交叉品种牛,它们被养高谷物饮食.
- 牛通过干蒸机的谷物加溶剂载体接受了对照 (CTL) 或SCFP补充剂 (28g/牛/天).
- 测量包括ex vivo和in vivo牛体pH值,氨 (NH3-N),挥发性脂肪酸 (VFA),气体产量,CH4和营养物质的明显全道消化能力.
主要成果:
- 补充SCFP对ex vivo体发酵参数或体内体pH和NH3-N没有影响.
- 在体内,SCFP降低了总VFA度,减少了酸盐和丁酸盐,并增加了酸盐与酸盐的比率.
- 干物质,有机物质和粉的明显全道消化能力在SCFP中增加,原蛋白消化能力有所改善的趋势.
结论:
- 补充28g/牛/天的SCFP改变了高谷物饮食的牛肉牛的体内 ruminal 发酵模式.
- 补充SCFP改善了关键饮食成分的明显全道消化能力,表明营养物质利用率提高.
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