不同饲喂方式对同期牦牛的发情率、血液生化指标和生殖激素的影响

Effects of different feeding methods on estrus rate,blood biochemical indexes and reproductive hormones of yaks in the same period

文章旨在研究舍料、放牧+补饲、放牧+不补饲和同期发情处理方式对母牦牛生殖激素水平和血清生化指标的影响。试验将45头健康母牦牛随机分为3组,每组15头,分别为舍饲、放牧+补饲、放牧+不补饲。放牧+不补饲组为传统放牧,试验为期3个月;同时,利用ELISA测量所有牦牛血浆中孕酮(P4)、雌二醇(E2)、促黄体素(LH)和促卵泡激素(FSH)等生殖激素含量,并对比分析了血清中生化指标的差异。结果表明,通过3个月不同饲养方式下的饲喂,舍饲组牦牛发情率显著高于放牧+不补饲组(P<0.05),放牧+补饲组发情率显著高于放牧+不补饲组(P<0.05),放牧+补饲组和舍饲组之间差异不显著(P>0.05)。舍饲组、放牧+补饲组血清中的葡萄糖、白蛋白、球蛋白极显著高于放牧组(P<0.01);舍饲组牦牛血清中总蛋白和谷草转氨酶显著高于放牧组(P<0.05)。研究表明,营养的供给影响P4、E2、LH、FSH的基础水平,舍饲的育肥方式不仅能增强抗病能力,也能提高生长发育与繁殖性能。

The effects of reproductive hormones and serum biochemical indexes of the female yak were investigated.In this experiment,45 healthy female yaks were selected and divided into three groups,15 of which were house feeding,grazing+supplementary feeding and grazing+no supplementary feeding.The grazing+non-feeding group was the control group for 3 months;the difference of reproductive hormone concentrations of P4,E2,LH and FSH in yaks were determined by ELISA,and the difference in biochemical indexes in serum were analyzed.The results showed that after 3 months of feeding under different feeding methods,the yak Estrus was significantly higher than grazing+non-feeding group(P<0.05),the grazing+supplementary feeding group was significantly higher than grazing+no-feeding group(P<0.05),and the grazing+supplementary feeding group was significantly higher than grazing+non-feeding group(P<0.05).The glucose,albumin and globulin in serum were significantly higher than grazing group(P<0.01);the total protein and grain grass transaminase in yak serum were significantly higher than grazing group.The study shows that the supply of nutrition affects the basic levels of progesterone,estrogen,LH and FSH,and the fattening method of house feeding can not only enhance the disease resistance,but also improve the growth,development and reproductive performance.