每天两次3 - 氧醇补充剂对放牧奶牛肠道甲排放的影响
H Costigan1, L Shalloo1, M Egan1
1Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland P61 P302.
Journal of dairy science
|June 8, 2024
概括
每天两次补充放牧奶牛3 - 氧醇 (3-NOP) 减少甲 (CH4) 大约5%在24小时内. 这种方法增加了 (H2) 产量,但没有影响牛奶产量或牛体状况.
科学领域:
- 动物科学动物科学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 在封闭的乳制品系统中,3-氧醇 (3-NOP) 有效地降低了肠道甲 (CH4).
- 放牧系统中的补充,特别是每天两次挤奶,仍未得到充分研究.
- 有效的CH4减排策略对于可持续的乳制品生产至关重要.
研究的目的:
- 为了评估每天两次3 - NOP补充剂在放牧奶牛中的有效性.
- 评估3-NOP对肠道CH4, (H2),二氧化碳 (CO2),牛奶产量,体重,身体状况评分和干物质摄入量的影响.
- 确定在基于牧场的系统中使用增剂输送的挤奶时间的可行性.
主要方法:
- 一项为期12周的研究,涉及52只放牧的奶牛 (26只接受治疗,26只控制).
- 接受治疗的奶牛在奶期间每天两次接受3-NOP (80 mg/kg DMI).
- 肠道气体排放 (CH4,H2,CO2) 用GreenFeed单位进行测量.
主要成果:
- 3-NOP补充剂导致H2产量增加了1.6倍 (P < 0.001).
- 在补充后3小时内,甲 (CH4) 产量减少了28.5% (P < 0.001).
- 整体24小时的CH4产量减少了约5% (P<0.050),没有影响牛奶产量,体重或身体状况得分.
结论:
- 每天两次3 - NOP补充剂在挤奶时为放牧奶牛提供了肠道CH4的适度降低.
- 增加的H2产量表明,乳头发酵途径发生了转变.
- 需要对缓释配方或替代养系统进行进一步的研究,以提高全天的3-NOP疗效.
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