乳牛的热应激:影响,识别和缓解策略 - - 综述
Charles Paranhos Oliveira1, Fernanda Campos de Sousa1, Alex Lopes da Silva2
1Departament of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa 36570-900, Brazil.
Animals : an open access journal from MDPI
|January 25, 2025
概括
经历热应激的奶牛的生产率和健康状况下降. 有效的冷却策略,如带通风的蒸发式增热冷却,对于动物福利和牛奶生产至关重要.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 农业工程 农业工程
背景情况:
- 热应激显著影响奶牛的生产力,健康和生殖能力.
- 热应激的准确识别依赖于生理 (心率,呼吸,直肠温度) 和环境指标.
- 温度和湿度指数 (THI) 是评估热条件的关键环境指标.
研究的目的:
- 探索识别和减轻奶牛热应激的方法.
- 突出温度调节和热状况评估的重要性.
- 评估特定冷却策略的有效性.
主要方法:
- 使用生理和环境指标来检测热应激.
- 采用机器学习模型来分析热状况数据.
- 实施加热蒸发式冷却系统与强制通风相结合.
主要成果:
- 物理和环境数据对于准确的热应力评估至关重要.
- 机器学习模型可以有效地识别热应激条件.
- 带有通风的蒸发式冷却增强了散热,减轻了压力.
结论:
- 使用生理学,环境和机器学习数据的综合方法改善了奶牛的热应激检测.
- 蒸发式增热冷却和通风是缓解热应激的有效策略.
- 减轻热应激对于提高奶牛福利和生产率至关重要.
相关概念视频
02:45Responses to Heat and Cold Stress
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
01:09Thermal Stress
If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...