为研究不同饲养模式下,热应激对泌乳奶牛躺卧行为的影响,2016年7月中旬在津冀地区选取自由卧床式牧场(Free Stall)和垫料通栏牧场(Bedding Pack)各一个,连续6d收集每个牧场高产群40头奶牛的躺卧时间、躺卧次数及牛舍温湿度数据,对热应激下不同圈养模式奶牛的躺卧行为进行研究.研究发现,随着温湿度指数(THI)升高,两个牧场奶牛的躺卧时间均出现下降,两个牧场日均躺卧时间与THI之间均存在负相关性,垫料通栏牧场受到的影响更加严重一些;两个牧场的躺卧次数和THI之间均不存在相关性.%The aim of this paper is to study effect of heat stress on lying behavior of milking cows in different feeding models. In middle of July, 2016, one free stall farm and one bedding pack farm in Tianjin and Hebei Province were chosen for this research. Lying behaviors (total lying timeper day and lying times per day) of 40 milking cows and temperature and humidity in six consecutive days were recorded in detail. The results showed that total lying time per day was decreased with the increasing of THI in both of two farms, which meant there was a negative correlation between lying time and THI. And the effect of THI on lying time of milking cows in bedding pack was more serious. However, there was no any correlation between lying times and THI.
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