舍饲散栏有窗奶牛舍温热环境的年动态研究

发布时间：2018-06-20 10:04

  本文选题：奶牛 + 温热环境　； 参考：《中国畜牧兽医》2017年10期

【摘要】：为研究寒区奶牛舍温热环境的年动态变化,试验选择河北省承德市某规模化奶牛场一栋散栏有窗奶牛舍,连续12个月监测舍内外的气温、相对湿度和风速并分析其规律。结果表明,全年奶牛舍内、外气温均表现为中午高、早晚低的规律性变化,相对湿度则表现出相反的规律。夏季(6~8月)每天有7.5~10 h舍内气温高于25℃,且在6月出现了舍内气温高于舍外气温的现象。12月舍内风速几乎全天为0 m/s。从综合指数分析,夏季每天09∶30~19∶30(10 h)舍内温湿指数(THI)均超过72,奶牛处于轻度热应激状态;冬季的风寒温度(WCT)均未低于-10℃,奶牛不遭受冷应激。综合以上结果,对于寒区散栏有窗奶牛舍,夏季应加强防暑降温措施,冬季加强通风换气。
[Abstract]:In order to study the annual dynamic changes of the temperature and heat environment of dairy cattle in cold region, the experiment selected a large scale dairy cattle farm in Chengde, Hebei Province, to monitor the temperature, relative humidity and wind speed and analyze the regularity of temperature, relative humidity and wind speed in and out of the house for 12 months. The results showed that the internal and external air temperature of the dairy cattle in the whole year all showed regular changes of high noon and low morning and evening, while the relative humidity showed the opposite rule. During June ~ August, the temperature of 7.5 鈩，

本文编号：2043884