在哺乳期的泽西奶牛中,甲的生产和整个动物的能量利用,这些奶牛被养了含有形式的料添加剂
S C Sherwood1, A L Carroll1, K K Buse1
1Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, 68503.
Journal of dairy science
|April 11, 2025
概括
作为料添加剂的Alga Bio 3.0显著降低了奶牛的甲 (CH4) 排放量,降低了高达19.6%的甲 (CH4). 这种饮食变化提高了能量转换效率,但没有影响牛奶产量.
科学领域:
- 动物科学动物科学
- 营养生物化学 营养生物化学
- 环境科学 环境科学
背景情况:
- 甲 (CH4) 是一种强大的温室气体,由反动物的肠道发酵产生的.
- 减少来自牛的CH4排放对于缓解气候变化至关重要.
- 提议使用含有形的料添加剂Alga Bio 3.0 (ALB) 来减少肠道CH4的产生.
研究的目的:
- 评估增加Alga Bio 3.0 (ALB) 含量的增加对甲 (CH4) 生产,能源和利用以及哺乳期泽西奶牛的牛奶产量的影响.
- 评估ALB对料摄入量,消化能力和气体动力学的影响.
主要方法:
- 一个四倍的3 × 3拉丁方形设计与12个哺乳泽西奶牛在三个28天期间被使用.
- 奶牛的食中增加了ALB的度:0% (0CTRL),0.46% (0.46LOW) 和0.93% (0.93HIGH) 在干物质 (DM) 基础上.
- 使用头箱式间接热量计测量了甲产量和气体动力学.
主要成果:
- 增加ALB的含量线性降低了CH4产量19.7% (L/d) 和18.4% (L/kg DMI).
- 气的产量线性增加,这表明皮发酵途径发生了变化.
- 在干物质摄入量 (DMI),牛奶产量或能量校正牛奶 (ECM) 中没有发现显著差异.
- 牛奶脂肪百分比线性下降,但牛奶脂肪产量保持不变.
- 主要营养素的消化能力和能量利用 (DE转化为ME) 显示在ALB补充后有所改善.
- 牛奶中的形残留物低于检测极限.
结论:
- 藻生物3.0有效降低了哺乳乳奶牛的肠道甲排放量,高达19.6%.
- 补充ALB可以提高将可消化的能量转化为可代谢的能源的效率.
- 料添加剂显示出作为减轻牛类温室气体排放的战略潜力,而不会对牛奶生产或料摄入产生负面影响.
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