高湿热条件下蜀宣花牛与西门塔尔牛、荷斯坦牛血液生化指标比较研究

Study on the blood biochemical indexes of Shuxuan,Simmental and Holstein cattle under the condition of High humidity and Heat

为了明确地方牛种资源的耐热应激生化调节模式,试验测定了6—9月份高湿热环境下西门塔尔牛、荷斯坦牛和蜀宣花牛的血液生化指标。结果表明:7—8月份时,荷斯坦牛和西门塔尔牛血清中总蛋白、甲状腺素(T4)减少量极显著高于蜀宣花牛(P<0.01);三碘甲腺原氨酸(T3)减少量高于蜀宣花牛;皮质醇(cortisol)、谷丙转氨酶(GPT)、肌酸激酶(CK)增加量均显著或极显著高于蜀宣花牛(P<0.05或P<0.01)。说明蜀宣花牛较西门塔尔牛和荷斯坦牛具有更强的抗热应激能力。

The aim of the present study was to reveal the characteristic biochemical regulation model of heat stress in local cattle. The blood biochemical indexes of Simmental,Holstein and Shuxuan cattle in high humidity and heat environment were measured from June to September. The results showed that from July to August,the decrement of serum total protein and thyroxine( T4) of Holstein and Simmental cattle was significantly higher than that in Shuxuan cattle( P<0. 01),and the decrement of triiodothyronine( T3) was higher than that in Shuxuan cattle. But the increment of cortisol,glutamate pyruvate transaminase( GPT) and creatine kinase( CK) was higher than that in Shuxuan cattle,respectively( P<0. 05 or P<0. 01). The results indicated that the Shuxuan cattle had stronger ability to resist hot-wet stress compared with Simmental and Holstein cattle.