作为回应在牛中直接输入合成形式的小体输液后,肠道甲的产生
W Muizelaar1, K Nichols2, H Z Taweel3
1Wageningen Livestock Research, Wageningen University & Research, 6700 AH Wageningen, the Netherlands; Animal Nutrition Group, Wageningen University & Research, 6700 AH Wageningen, the Netherlands.
Journal of dairy science
|February 12, 2026
概括
在牛食中补充形式 (CHBr3) 有效地降低了肠道甲 (CH4) 排放量. 高剂量显著降低CH4的产量,尽管存在与料摄入的潜在权衡.
科学领域:
- 农业科学 农业科学
- 动物科学动物科学
- 环境科学 环境科学
背景情况:
- 牛的肠道甲 (CH4) 排放有助于温室气体的产生.
- 形式 (CHBr3) 是一种强大的CH4抑制剂,但其剂量反应,机制和副作用需要进一步研究.
- 之前使用海藻的研究缺乏特异性来分离CHBr3的影响.
研究的目的:
- 为了确定合成甲基 (CHBr3) 对干物质摄入量 (DMI),肠道气体排放和牛的反发酵的剂量依赖性影响.
- 研究CHBr3对CH4和 (H2) 生产的影响的时间动态.
- 评估潜在的副作用,例如减少料摄入量.
主要方法:
- 在4x4拉丁方形设计中,四头荷尔斯泰因-弗里西亚牛通过14天的时间内通过小灌输获得形式 (0,59,192或592毫克/天).
- 使用GreenFeed系统测量干物摄入量 (DMI) 和肠道气体排放量 (CH4,H2).
- 分析了鲁米纳挥发性脂肪酸 (VFA) 度和摩尔比例.
- 后勤功能模拟了输入和冲洗期间的气体生产动态.
主要成果:
- 随着CHBr3剂量的增加,CH4的产量和产量呈四级下降,在592 mg/d时降低了90%左右.
- (H2) 产量和产量随着CHBr3剂量的增加而增加了四分之一.
- 最高剂量 (592 mg/d) 数字上将DMI降低了6.2 kg/d.
- 输注后2-3天内出现CH4降低效应,并在输注后4-5天内逆转.
结论:
- 合成CHBr3有效地以剂量依赖的非线性方式减少肠道CH4排放.
- 592 mg/d剂量实现了显著的CH4减少,但需要注意其对DMI的影响.
- 时间动态对于理解CHBr3在CH4缓解策略中的有效性和可逆性至关重要.
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