Cutaneous and respiratory evaporation rates of sheep in hot environments

[摘要]

Ten adultCorriedale sheep were evaluated for respiratory (E_R) and cutaneous(E_C) evaporation rates. The animals were observed about 10times each by recording changes in their live weigth with high-sensitiviy straingauges, under different conditions of air temperature (21.1 to 41.9ºC)and partial vapour pressure (1.53 to 3.01 kPa). Average evaporation rates were0.7599±0.0094 g.h^-1.kg^-1 for E_Rand 1.3029±0.0591 g.h^-1.kg^-1 for E_C.Cutaneous evaporation was considered as an important heat loss mechanism forsheep in hot environments. There were discussed the effects of sex, fleece thickness,air temperature, and air humidity.

[学科分类] 兽医学