婆闽牛耐热性能的研究

Study On The Heat Resistance Of Bomin Cattle(Brahman×Minnan)

作者对婆闽牛的体表面积、汗腺数量与体积、耐热系数的测定等研究表明,婆闽牛体表面积大,利于散热;汗腺数量与体积分别比闽南黄牛增加33.3％和30.0％;婆闽牛耐热系数为83,闽南黄牛仅为76。在高温(36℃)暴晒下,婆闽牛仍能在牧地上照常采食,无畏热表现。说明婆闽牛比闽南黄牛更为耐热,能更好地适应热带、亚热带生态条件。

The measurements of the body surface area, the volume and numbers of sweat gland and the heat resistant parameters show that the Bomin cattle have large body surface area. The numbers and volume of sweat gland of Bomin cattle is increased by 33. 3％ and 30. 0% compaired with Minnan cattle, a local cattle in Fujiang province. The heat hardness of Bomin cattle is 83 whereas the local cattle is only 76. Those give some explanations that Bomin cattle can be grazed in higher ternperature condition without any heat stress, which shows that Bomin cattle adapts to environment in the tropics and subtropics.