评估素提取物混合物的剂量反应模式对肉牛中的营养利用和甲排放的影响
Jordan M Adams1, Luiz F Dias Batista1, Clarice M Francis1
1Department of Animal Science, Texas A&M University, College Station, TX, 77843-2471, USA.
Journal of animal science
|February 11, 2026
概括
补充增长的牛与素提取物 (TE) 可以减少甲 (CH4) 排放. 最佳的CH4缓解发生在干物质的0.20-0.22%,而不会对营养利用或能源效率产生负面影响.
科学领域:
- 动物科学 动物科学
- 类动物营养 类动物营养
- 环境科学 环境科学
背景情况:
- 牛的甲 (CH4) 排放有助于温室气体的产生.
- 素提取物 (TE) 显示出在肉牛中减轻CH4的潜力.
- 混合TE的最佳补充率尚未明确定义.
研究的目的:
- 评估混合素提取物 (TE) 对生长牛的营养利用和气体排放的影响.
- 确定最佳的饮食中含有TE的摄入率,以最大限度地减少CH4的产生.
- 评估 TE 对能量分割和代谢的影响.
主要方法:
- 养殖中的小牛被食,补充了TE的0.0,0.3,0.6或0.9%的干物质 (DM).
- 用间接热量计测量了整个动物的气体交换和营养消化能力.
- 分析了和血液的参数,以评估代谢效应.
主要成果:
- TE补充剂没有影响营养摄入量,但对酸性洗剂纤维 (ADF) 消化能力和便N排泄有四次性影响.
- 甲 (CH4) 生产显示了二次的剂量反应,在0.20-0.22%的DM含量下进行最佳缓解.
- 呼吸系数与TE线性增加,但整体能量分割不受影响.
结论:
- 混合素提取物可以有效地减少生长牛的甲排放.
- 对TE的最佳饮食含量率为0.20-0.22%的DM,可以最大限度地减少CH4的产生.
- 在不影响营养利用的情况下,TE补充为可持续的肉牛生产提供了一个有希望的策略.
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