Thermoregulation responses of broiler chickens to humidity at different ambient temperatures. I. One week of age
Thermoregulation responses of broiler chickens to humidity at different ambient temperatures. I. One week of age
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DOI：
10.1093/ps/84.8.1166
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发表时间：
2005-08-01
期刊：
影响因子：
4.4
通讯作者：
Decuypere, E
中科院分区：
文献类型：
--
作者：
Lin, H;Zhang, HF;Decuypere, E
进行了三项试验来研究相对湿度（35%、60%和85%）对不同温度（35度、30度和25度）下1周龄肉鸡体温调节的影响。在暴露后 24 小时内的 5 个时间点（1、4、8、16 和 24 小时）记录直肠温度以及背部和胸部羽毛温度对湿度的反应。湿度通过在高温、低温和热中性温度下重新分配体内热量来影响 1 周龄肉鸡的体温调节。热量的重新分配导致直肠温度降低和周围温度升高，这在高温和低温下分别是有利的和不利的。这些结果表明，表面温度对核心温度的反馈效应在家禽中也存在，正如在哺乳动物中观察到的那样，并且不仅可以由环境温度的变化引起，还可以由高温下湿度的变化引起。热平衡的扰动不能仅通过 RT 的变化来建立，而必须考虑核心和表面温度。直肠和表面温度的每日节律受到湿度的影响。
Three trials were conducted to investigate the effect of RH (35, 60, and 85%) on thermoregulation of 1-wk-old broiler chickens at different temperatures (35, 30, and 25 degrees). The response to humidity in rectal temperature and plumage temperature at the back and breast within 24 h after exposure were recorded at 5 time points (1, 4, 8, 16, and 24 h). Humidity affected the thermoregulation of 1-wk-old broiler chickens by redistributing heat within the body at high, low, and thermoneutral temperatures. The redistribution of heat resulted in decreased rectal temperature and increased peripheral temperature, which were, respectively, beneficial and unfavorable at high and low temperatures. These results suggested that feedback effects of surface temperature on core temperature also exist in poultry, as already observed in mammals, and could be induced not only by changed ambient temperature but also by the changes in humidity at high temperature. The disturbance of thermal equilibrium could not be established solely by changes in RT, but rather core and surface temperatures had to be considered. The daily rhythms in rectal and surface temperatures were affected by humidity.