甲类别,免疫反应,料效率和哺乳乳奶牛的乳头微生物群体
Hendra Nur Cahyo1, Puchun Niu1, Phillip B Pope2
1Faculty of Biosciences, Norwegian University of Life Sciences (NMBU), 1432 Aas, Norway.
Journal of dairy science
|February 6, 2026
概括
乳牛在早期哺乳期的甲排放较低,免疫反应和料效率较差. 早期哺乳期中甲产量较高可能表明乳头发酵较大,支持料效率和免疫功能.
科学领域:
- 动物科学动物科学
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肠道甲 (CH4) 产量是奶牛养殖的一个重要问题,因为它对环境的影响.
- 了解影响CH4产量的因素,如饮食,哺乳期和宿主生理学,对于缓解策略至关重要.
研究的目的:
- 为了研究乳牛在早期和晚期哺乳期间肠道甲 (CH4) 产量,免疫反应,料效率和乳牛小肠微生物组合之间的关系.
- 为了确定低CH4产量和高CH4产量奶牛之间的这些参数的潜在差异.
主要方法:
- 测量干物质摄入量 (DMI),体重 (BW),能量校正牛奶 (ECM) 产量和CH4排放量是在早期和晚期哺乳的霍尔斯坦牛的呼吸室中进行的.
- 在体外免疫反应测试中,使用全血 (LPS刺激) 和外周血液单核细胞 (PHA和ConA刺激) 进行了免疫反应测试.
- 体微生物16S rRNA基因测序被用来分析体微生物组合.
主要成果:
- 在早期哺乳期,低CH4产量的奶牛表现出较低的免疫反应和较低的料转化效率,而不是高CH4产量的奶牛. 低CH4产量奶牛的小肠微生物组显示了较高的Metanospaera和Marvinbryantia的相对丰度.
- 在晚期哺乳期,低CH4产量组和高CH4产量组之间没有观察到免疫反应或料转化效率的显著差异.
- 在晚期哺乳期的低CH4产奶牛和高CH4产奶牛之间观察到明显的小肠微生物概况,每个群体中都富含了特定的细菌属.
结论:
- 在早期哺乳期,低CH4产量可能与更快的能量平衡成就有关,但以免疫功能为代价. 相反,更高的CH4产量可能反映出更强的皮发酵,提高料效率和免疫支持.
- 在乳牛的早期和晚期哺乳期之间,CH4产量,宿主生理学和肠微生物组之间的关系有所不同.
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