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一个好的开始:与奶牛长寿相关的早期生命风险因素
1Department of Animal and Veterinary Sciences, Aarhus University, Tjele, Denmark.
The Journal of dairy research
|November 6, 2025
概括
在生命早期的良好开始显著影响乳牛的寿命和终身牛奶产量. 较大小小的小牛和较晚的第一个分娩年龄会对生产寿命产生积极影响,而双胞胎会减少生产寿命.
科学领域:
- 动物科学动物科学
- 乳制品生产 乳制品生产
- 生殖生物学 生殖生物学
背景情况:
- 奶牛的寿命对于经济可行性,环境可持续性和动物福利至关重要.
- 在第一次分娩之前的早期生活因素可以影响奶牛的生产寿命和整体产量.
- 了解这些早期影响是改善乳牛群管理的关键.
研究的目的:
- 研究生命早期风险因素与奶牛寿命之间的关系.
- 评估小牛的大小,双胞胎和第一次分娩时的年龄如何影响生产寿命和终身牛奶产量.
- 为提高奶牛管理战略提供数据驱动的见解.
主要方法:
- 利用了来自丹麦牛数据库的数据,用于2019-2023年期间杀的奶牛.
- 采用线性混合模型来分析解释变量,包括小牛的大小,双胞胎和第一次分娩时的年龄.
- 包括超过70万头奶牛的生产寿命 (LPL) 和一生牛奶产量数据.
主要成果:
- 单独生小牛的较大小与更长的生产寿命和更高的终身牛奶产量相关.
- 与双胞胎相比,双胞胎出生的奶牛的生产寿命较短,一生牛奶产量较低.
- 在第一次分娩 (第三季度) 时较晚的年龄与显著更长的生产寿命和提高终身牛奶产量有关.
结论:
- 早期生活条件,特别是小牛的体型和第一次分娩的年龄,是奶牛寿命和生产力的关键决定因素.
- 优化早期管理可以在群体经济和可持续性方面取得重大改进.
- 这项研究强调了为乳牛提供"良好的开始"对于长期成功的重要性.
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