局部通风对奶牛体表温度和呼吸频率的影响

Effects of Local Ventilation on Shell Temperature and Respiration of Dairy Cows

通过对泌乳牛舍局部通风散热效果的研究,对散栏式奶牛舍夏季防暑降温措施的使用效果进行评价,并为其改善提供参考,以减少夏季高温对奶牛生产性能的影响,为奶牛养殖企业生产效益的提高提供保障。结果表明,气温对奶牛的体表温度和呼吸频率均有显著的影响(P<0.05);当气温为30℃时,局部通风显著降低奶牛的体表温度(P<0.05),但其对奶牛的呼吸频率无显著影响(P>0.05)。

The effects of local ventilation was investigated, the evaluation of the using effects of cooling protection from heat for dairy cows, feeding in free stall barns, was conducted. Furthermore, the modification for cooling protection from heat was provided. The purpose was to re- duce the impact of summer high temperature on performance of dairy cows, and protection for the productivity efficiency of dairy farm. The re- suits show that ： the effects of air temperature on shell temperature and respiratory rate of dairy cows were significant （ P 〈 O. 05 ） ; When the tem- perature is 30℃, local ventilation decreased shell temperature of dairy cows significantly （P 〈 0.05 ）, but had no significant effect on dairy cows resniratorv rate （ P〉 O. 05）.