荷斯坦牛血红细胞Na~+-K~+-ATP酶活力与其耐热性的相关性研究

Relationship between Erythrocyte Na~+-K~+-ATPase Activity and Heat-resistance Ability in Holstein cows

中文关键词: 荷斯坦牛  Na -K -ATP酶  耐热性

英文关键词: Holstein  Na+-K+-ATPase  Heat-resistant  

中文摘要:

      [目的]为探讨Na+-K+-ATP酶在荷斯坦牛热应激过程中的作用.[方法]本研究比较测定了329头荷斯坦牛在非热应激期和热应激期的体温、红细胞K+和红细胞Na+-K+-ATP酶活力的变化.[结果]显示,试验牛群红细胞Na+-K+-ATP酶活力呈正态分布;不同胎次、产犊季节、泌乳期、场次牛Na+-K+-ATP酶活力差异不显著(P>0.05);不同性别牛Na+-K+-ATP酶活力差异极显著(P<0.01).在热应激期,同一泌乳期牛红细胞Na+-K+-ATP酶活力与产奶量下降率成负相关;荷斯坦牛的体温明显升高,产奶量明显下降,红细胞K+无显著变化,红细胞Na+-K+-ATP酶活力明显下降,与非热应激期相比只有红细胞K+差异不显著(P>0.05),其余都差异极显著(P<0.01);红细胞Na+-K+-ATP酶与体温成负相关,与产奶量成正相关,与红细胞K+的相关性不显著.[结论]在热应激期,荷斯坦牛红细胞Na+-K+-ATP酶活力与耐热性成正相关,红细胞Na+-K+-ATP酶活力高的荷斯坦牛,耐热性好.

英文摘要:

      To investigate the function of Na+-K+-ATPase during heat stress of Holstein cow,the body temperature,erythrocyte K+ concentration and Na+-K+-ATPase among 329 Holstein cows in non-heat stress and heat stress periods were compared.The results showed that the erythrocyte Na+-K+-ATPase activity of all dairy cows were in normal distribution.Na+-K+-ATPase activity of dairy cows of different pregnancy times,calving season,lactation and farms show no significant difference(P>0.05),while Na+-K+-ATPase activity in Ho...