哺乳期荷尔斯坦奶牛的有针对性的生殖管理:经济回报
Ricardo C Chebel1, Tomas Gonzalez2, Ana B Montevecchio2
1Department of Large Animal Clinical Sciences, University of Florida, Gainesville, FL 32610; Department of Animal Sciences, University of Florida, Gainesville, FL 32610.
Journal of dairy science
|November 9, 2024
概括
使用自动监测设备 (AMD) 进行的有针对性的生殖管理 (TRM) 通过优化授精时间和减少杀,提高了霍尔施泰因奶牛的怀孕率并增加了毛利率. 这种方法为传统的同步协议提供了更有利可图的替代方案.
科学领域:
- 乳牛的繁殖管理 乳牛的繁殖管理
- 动物育种和遗传学动物育种和遗传学
- 乳制品科学与技术 乳制品科学与技术
背景情况:
- 传统的排卵同步协议 (OvSP) 被广泛用于产后奶牛的人工授精 (AI).
- 全面采用OvSP可能不是最经济有效的策略.
- 自动监控设备 (AMD) 提供了更精确的雌激素检测的潜力.
研究的目的:
- 评估使用 AMD 进行首次产后人工智能和非怀孕母牛再播种的有针对性的生殖管理 (TRM) 的有效性.
- 为了比较TRM与传统OvSP的生殖性能和经济回报.
- 测试TRM改善生殖表现和经济回报的假设.
主要方法:
- TRM涉及基于AMD检测的雌激素的AI,OvSP作为未在强烈雌激素中检测到的奶牛的备用.
- 对照奶牛接受了双重同步协议与固定时间AI (TAI) 或视觉/补丁辅助雌激素检测以进行再播种.
- 计算了生殖绩效,牛奶产量和毛利,并使用蒙特卡洛模拟进行经济分析.
主要成果:
- 接受TRM治疗的奶牛怀孕的风险更大 (调整后的危险比率=1.17).
- TRM导致更多的奶牛开始新哺乳 (82.6%vs. 77.2%),销量减少 (15.5%vs. 20.8%).
- 与对照组相比,TRM治疗每头牛的毛利比对照组高108美元,这是由于妊娠率的提高和切割动态的改变所致.
结论:
- 使用自动监测设备 (AMD) 的有针对性的生殖管理 (TRM) 显著提高了霍尔斯坦牛的怀孕率和经济回报.
- TRM优化了授精时间,减少了对固定时间AI协议的依赖,并对杀动态产生了积极的影响.
- 正如TRM所证明的那样,高效的生殖管理对高产奶牛具有重大经济影响.
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