鲁西黄牛引入到祁阳高温环境下的生理适应观察

Physiological Adaptation of Luxi Yellow Cattle under Higher Temperature Enviroment in Qixian

本文主要论述山东鲁西黄牛由原产地 (北纬 34°5′)南移 8°引入到湖南祁阳(北纬 2 6°2′)中亚热带丘陵地区后 ,对当地高温环境的适应表现。其结果 :在 7月份平均气温达 30 .7℃ ;最高气温达 38.7℃ ;8月份平均气温为 31 .4℃ ,最高气温达到 39.8℃的高温环境下 ,所有牛只均安全渡过了高温期。在此期间鲁西黄牛的生理常数与原产地相比 ,除每分钟心跳次数和呼吸次数略高于原产地外 ,体温均在原产地体温变动的正常范围之内。未出现中暑现象。由此说明鲁西黄牛有较强的耐热能力 ,能依靠自身的生理调节机制来维持“内环境恒定”,并与周围环境达到统一。结论 :鲁西黄牛在良好饲养管理条件下 。

In this paper, the adaptation of Luxi yellow cattle under higher temperature environment was studied after it was introduced from Shandong province to Qiyang.The results showed that all the cattle was growing well when the mean temperature in July and August are 30.7℃ and 31.4℃ and the highest temperature in July and August are 38.7℃and 39.8℃,respectively. Luxi cattles heartbeats and breathing rate were a bit of higher in Qiyang than that in Shandong province .The cattle didnt suffer sunstroke .Therefore it was showed that Luxi cattle has higher heat tolerance ability .It can depend on itself physiological mechism and keep 'its inside environment balance'.Under good feed and manage condition , Luxi cattle can grow well on higher temperature and humidity environment in Qiyang redsoil hilly countryside.