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时间序列牛奶β-基酸盐动态与乳牛早期生殖表现之间的关联
W Chin1, W Steeneveld1, M Nielen1
1Department Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3508 TD Utrecht, the Netherlands.
Journal of dairy science
|March 30, 2024
概括
在早期哺乳期的奶牛中监测牛奶β-基酸盐 (BHB) 动态表明,较高的BHB水平和较早出现的超基托拉与延迟的生殖表现和生育事件有关.
科学领域:
- 乳制品科学 乳制品科学
- 动物繁殖动物的繁殖
- 代谢性疾病的监测和监测
背景情况:
- 精确监测奶牛的生殖性能和能量平衡对于群体管理至关重要.
- 牛奶β-基酸盐 (mBHB) 和孕激素 (P4) 提供了关于牛健康和生育能力的见解.
- 农场内的传感器系统可频繁测量这些关键指标.
研究的目的:
- 在牛奶中 (DIM) 在前20天内描述mbhb的动态.
- 评估mbhb动态与牛早期生殖表现之间的关联.
- 调查超球性起病和严重程度对生育指标的影响.
主要方法:
- 利用了来自荷兰38个农场的4133头奶牛的两年时间序列数据.
- 分析了mbhb,每日牛奶产量和生殖指标 (周期性几天,第一次,第一次授精).
- 定义的mBHB动态参数:平均的mBHB (AvgBHB),超基托拉的发作 (OnsetKeto) 和升高的mBHB的持续时间.
主要成果:
- 在20 DIM内,平均AvgBHB为73μmol/L,平均OnsetKeto为8 DIM.
- 55.8%的牛患有超凯托拉克在第一个星期就出现了OnsetKeto;41.5%的牛在20 DIM内没有出现OnsetKeto.
- 较高的AvgBHB和较早的OnsetKeto显着与延迟恢复周期性和第一个雌激素有关.
结论:
- 早期检测和监测mbhb动态对于了解奶牛能量平衡至关重要.
- 早期哺乳期的超凯托拉克会对生殖能力产生负面影响,这表明需要有针对性的管理策略.
- 将MBHB监测整合到群体管理中可以改善乳牛的早期繁殖成功.
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