基于各种系统因素,对加拿大霍尔斯坦牛的寿命和杀原因进行了全面的描述
Taiana Cortez de Souza1,2, Luis Fernando Batista Pinto1, Valdecy Aparecida Rocha da Cruz1
1Department of Animal Sciences, Federal University of Bahia, Salvador, BA, Brazil.
Translational animal science
|October 16, 2023
概括
在加拿大,杀死霍尔斯坦牛的主要原因是生殖问题,其次是牛奶生产和健康问题. 了解这些除原因可以改善奶牛场管理和育种计划.
科学领域:
- 动物科学动物科学
- 乳牛养殖 乳牛养殖 乳牛养殖
- 农业经济学 农业经济学
背景情况:
- 过早杀奶牛显著影响农场的利能力.
- 确定主要的杀原因对于改善乳牛育种计划中的群体管理和选择策略至关重要.
研究的目的:
- 从1996年到2020年,分析了加拿大霍尔斯坦牛的34个不同的杀原因的时间频率.
- 提供对影响杀决策的因素的见解,以提高奶牛场的利能力和育种计划的有效性.
主要方法:
- 利用了来自加拿大9683个牛群的3,096,872只被杀的霍尔斯坦牛的综合数据集.
- 在不同时期,季节,气候和生态区进行了34个杀原因的时间频率分析.
- 在分析之前进行了数据编辑和质量控制.
主要成果:
- 生殖问题 (23.02%) 是杀的主要原因,其次是牛奶生产 (20.82%) 和健康 (20.39%).
- 杀频率因季节而异,生殖问题在秋季,冬季和春季高,而健康问题在夏季占主导地位.
- 经济因素显示出转变,从1996年至2014年的频率低于预期,从2015年至2020年的频率高于预期.
结论:
- 生殖和牛奶生产问题是加拿大霍尔斯坦牛屠宰的主要驱动因素.
- 杀原因的季节性和区域性变化需要定制的管理策略.
- 结果支持改进管理实践和选择性育种,以减少非自愿杀和提高奶牛场的可持续性.
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