去势对17～21月龄西门塔尔牛激素分泌的影响

发布时间：2018-06-02 13:43

本文选题：去势 + 西门塔尔牛　；参考：《西北农业学报》2017年08期

【摘要】：旨在研究去势对17~21月龄西门塔尔牛血清激素及月增量的影响。选取50头健康、16月龄的西门塔尔公牛,依据体质量进行配对试验,分为去势组和未去势组,每组25头,同一阶段饲喂相同饲粮,试验期150d。结果表明,全期平均月增量去势组比未去势组低6.14%,差异不显著;血清睾酮去势组显著低于未去势组;去势组雌二醇质量浓度有高于未去势组的趋势;去势组的生长激素质量浓度极显著低于未去势组;生长抑素质量浓度去势组显著高于未去势组;去势组的皮质醇质量浓度有低于未去势组的趋势。血液中促肾上腺皮质激素、胰高血糖素、胰岛素、前列腺素E2、甲状腺素和三碘甲腺原氨酸的质量浓度在去势组与未去势组间差异均不显著。表明去势致使17~21月龄西门塔尔牛血液中生长激素质量浓度降低,生长抑素质量浓度增加,但对月增量无显著影响。
[Abstract]:The aim of this study was to study the effect of castration on serum hormones and monthly increments of 17- and 21-month-old Simmental cattle. Fifty Simmental bulls aged 16 months old were selected and divided into castrated group and non-castrated group. 25 of them were fed the same diet at the same stage for 150 days. The results showed that the average monthly increment of ovariectomized group was 6.14% lower than that of non-castrated group, the serum testosterone castration group was significantly lower than that of non-castrated group, and the estradiol concentration of castration group was higher than that of non-castrated group. Growth hormone concentration in castration group was significantly lower than that in non-castration group, somatostatin concentration in castration group was significantly higher than that in non-castrated group, and cortisol concentration in castration group was lower than that in non-castrated group. There was no significant difference between castrated and uncastrated groups in the concentration of corticotropin, glucagon, insulin, prostaglandin E _ 2, thyroxin and triiodothyronine in blood. The results showed that the growth hormone concentration and somatostatin concentration in the blood of 1721 month old Simmental cattle were decreased and somatostatin concentration increased, but there was no significant effect on the increment of somatostatin.
【作者单位】：新疆农业大学动物科学学院新疆肉乳用草食动物营养实验室;新疆畜牧科学院饲料研究所;塔里木大学动物科学学院;
【基金】：国家“十二五”科技支撑(2011BAD47B02) 新疆维吾尔自治区科研院所基本科研业务经费~~
【分类号】：S823

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