摘要
对考湖杂种羊在夏季高温下的应激反应作了一些生理生化测试分析。环境温度逐渐增高时,绵羊的体温、心率、呼吸均有不同程度的增加,其中呼吸、心率增加到一定的程度后,又趋于平缓下降,呈“S”形曲线变化;当环境温度在35℃以下时,皮温高于毛丛温度,绵羊可以蒸发和非蒸发两种方式散热,环境温度接近35℃时,皮温与毛丛温度相等,绵羊只能以蒸发方式散热;高温下血清中K、Na、Cl、胆固醇的浓度显著降低(P<0.01或P<0.05),血清甲状腺激素T_3、T_4浓度显著增加(P<0.01),血清葡萄糖浓度也有所增加。
Some physiological and biochemical responses of Kauhu crossbred sheep under high temperature conditions were measured. The body temperature, heart rate (HR) and respiratory rate (RR) of sheep increased with ambient temperature (AT). RR and HR maximized at 29℃. Below 35℃, the skin temperature was higher than that of wool, and sheep might lose heat through evaporative and nonevaporative ways. The skin temperature was equal to wool temperature at 35℃, its heat being lost only via evaporation. Potassium, sodium, chlorine and cholesterol concentrations in serum under high temperature conditions decreased 19.96, 17.43, 1.22 and 35.51% respectively (p<0.05 or p<0.01), while triiodothyronine and thyroxine increased significantly (p<0.01) and glucose content increased also.
出处
《应用生态学报》
CAS
CSCD
1992年第2期155-159,共5页
Chinese Journal of Applied Ecology
关键词
生态因子
耐热性
绵羊
热应激
Sheep, Heat stress, Heat tolerance, Subtropics, Ecological factor.
