哺乳期荷尔斯坦牛的有针对性的生殖管理:减少对外源生殖激素的依赖
Tomas D Gonzalez1, Luana Factor1, Ahmadreza Mirzaei1
1Department of Large Animal Clinical Sciences, University of Florida, Gainesville, FL 32610.
Journal of dairy science
|June 22, 2023
概括
自动监测设备 (AMD) 能够在奶牛中实现有针对性的生殖管理 (TRM). 这种方法减少了生殖激素的使用,并提高了305天在牛奶 (DIM) 中的怀孕率,特别是在具有强烈雌激的奶牛中.
科学领域:
- 乳制品科学 乳制品科学
- 动物繁殖 动物繁殖
- 精准畜牧业 精准畜牧业 精准畜牧业 精准畜牧业
背景情况:
- 自动监测设备 (AMD) 提供了个性化牛生殖管理的机会.
- 有针对性的生殖管理 (TRM) 旨在优化生殖效率并减少激素使用.
研究的目的:
- 评估TRM是否利用AMD减少生殖激素治疗并增加305天在牛奶中的怀孕率 (DIM).
- 评估产后早期雌激素特征 (EPEC) 对TRM下的生殖结果的影响.
主要方法:
- 1,930头荷尔斯坦牛被安装了AMD.
- 牛被分配到对照组 (固定时间AI) 或TRM组 (基于AMD检测的雌激素或DOV协议的AI).
- 评估了EPEC,并评估了67天和305天的怀孕.
主要成果:
- 在雌性期中,TRM增加了再播种 (70.5%,对照组为48.3%).
- 在没有强烈雌激素的奶牛中,TRM提高了305 DIM的怀孕率 (88.2%与80.8%对比).
- TRM显著降低了强烈的奶牛的生殖激素治疗 (2.0对比9.6治疗/母牛).
结论:
- 根据EPEC使用AMD为第一个AI选择多胎牛,可以减少激素的使用,而不会对第一个AI怀孕产生负面影响.
- 用AMD辅助的再输精加速了在没有强烈产后的奶牛中怀孕的建立.
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