以玉米草为基础的发酵总混合粮食补充外源细胞酶对生长表现,消化能力和生长肉牛的小发酵的影响
Junzhao Xu1, Xiaoni Wang1, Huaxin Niu1
1College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China.
Animal bioscience
|August 30, 2024
概括
添加细胞酶的发酵总混合配给 (FTMR) 改善了肉牛的生长和营养利用. 这种以玉米草为基础的料增强了消化能力和功能,同时减少了甲的产生.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 农业科学 农业科学
背景情况:
- 玉米是一种潜在的反动物料,但其高结构碳水化合物含量限制了利用.
- 外源细胞酶可以增强料中结构性碳水化合物的降解.
- 料的发酵可以改变其营养价值和发酵特性.
研究的目的:
- 为了评估基于玉米的未发酵和发酵的混合总量 (TMR) 补充外源细胞质素对中国Simmental公牛的影响.
- 评估对体外发酵,生长表现,养行为,消化能力,乳头发酵和酶活动的影响.
主要方法:
- 在体外和体外的研究使用未发酵TMR (TMR) 和发酵TMR (FTMR) 与外源细胞酶进行.
- 在体外培养中使用牛的转液,持续48小时.
- 在体内,24头公牛被TMR或FTMR养56天.
主要成果:
- 在体外,FTMR增加了中性清洁剂纤维 (NDF) 的降解性,总挥发性脂肪酸 (VFA) 和酸,同时降低了甲生产和pH值.
- 在体内,FTMR改善了平均每日增益,进食率,料效率和NDF可降解性.
- FTMR增强了总VFA,酸和丁酸盐度,降低了酸/酸的比率,并增加了细胞酶,西兰酶和β-葡萄糖酶的活动.
结论:
- 基于玉米的FTMR与外源细胞质有效减少结构性碳水化合物和体外甲生产.
- 在肉牛中,FTMR改善了营养的消化,吸收,乳头发酵和整体生长性能.
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