【摘要】 <正> 为了缓和夏季高温所造成的奶牛产奶量下降,北京市北郊农场畜牧五队于1984年6月下旬在两栋牛舍内和另两栋牛舍的运动场凉棚下安装了喷淋装置。采用3WB-17型农用喷雾器喷头,安装在舍内中央通道上方,每头牛一个喷头。喷淋时,舍内同时开动风机,雾雨蒙蒙,在舍外人们挥汗如雨,而舍内却凉气袭人。在运动场,牛自动去接受喷淋,淋湿后自动更多还原

【Abstract】 In summer in zone Beijing when the ambieut temperature exceeds 30℃sprinkling in barn decreased air temperature 1-3℃,although temperature-humidity index (THI) increased with higher relative humidity. At thesame time respiratory rates of cows reduced 20-30 breaths per minuteand rectal temperature declined 0.1-0.7℃. Perhaps with 20-30min.intervals sprinkling 1 min. for heat stress relief on dairg cows in Beijingis successful.更多还原