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热应激对小牛福利的影响
Jennifer Van Os1, Kimberly Reuscher1, Bethany Dado-Senn1
1Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706.
JDS communications
|April 22, 2024
概括
奶牛在寒冷和炎热的天气中受益于对住房,因为社交接触有助于热舒适. 牛犊更喜欢双双的住房,在温暖的月份通过通风来减轻这种情况.
科学领域:
- 动物福利科学 动物福利科学
- 环境生理学环境生理学
- 乳制品科学 乳制品科学
背景情况:
- 热应激 (寒冷和热) 显著影响乳牛的福利和生物功能.
- 现有的缓解策略侧重于营养,绝缘,阴影和通风.
- 在小牛中,热舒适度和社会需求之间的相互作用需要进一步研究.
研究的目的:
- 评估冬季和夏季奶牛犊的热舒适度和社交接触需求之间的对齐和冲突.
- 评估小牛在不同的热条件下对双和单独的偏好.
- 了解住房密度对热负荷和小牛福利的影响.
主要方法:
- 奶牛在冬季和夏季在大陆气候下单独或成对在户外子中养.
- 观察到小牛对社会接近和住房类型的偏好.
- 考虑了内的环境条件,包括热量负荷和通风.
主要成果:
- 两个季节的小牛都表现出一种偏好,即在对住时更喜欢社交近距离.
- 配对住房增加了热负荷,这有利于冬季的热舒适度.
- 被动室通风有效地减轻了夏季双人住房增加的热量负荷,与小牛的偏好保持一致.
结论:
- 配对住房可以通过满足热舒适度和社交接触需求来提高乳牛的福利,即使在具有挑战性的气候中也是如此.
- 住房战略应考虑双人住房的季节性好处和挑战.
- 需要进一步研究小牛的情感状态和对特定热应激减缓资源的偏好.
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