GnRH或HCG处理黄体早期阶段西门塔尔肉牛对血清激素水平和繁殖性能的影响  

Effects of GnRH or HCG Treatment During Early Luteal Phase on Serum Hormone Levels and Reproductive Performance in Simmental Beef Cattle

作　　者：张泽华 谢占峰 吕世春 张晗 贾振伟[1] ZHANG Zehua;XIE Zhanfeng;LYU Shichun;ZHANG Han;JIA Zhenwei(College of Animal Science and Technology,Inner Mongolia University for Nationalities,Tongliao 028043,China;Inner Mongolia Autonomous Region Tongliao City Horqin District Lianmeng Breeding Professional Cooperatives,Tongliao 028024,China)

机构地区：[1]内蒙古民族大学动物科技学院,内蒙古通辽028043 [2]内蒙古自治区通辽市科尔沁区联蒙养殖专业合作社,内蒙古通辽028024

出　　处：《中国兽医杂志》2025年第4期70-74,共5页Chinese Journal of Veterinary Medicine

基　　金：内蒙古自治区重点研发和成果转化计划(科技支撑东北振兴)项目(2022YFDZ0075);内蒙古自治区直属高校基本科研业务费项目(GXKY22002)。

摘　　要：为了研究促性腺激素释放激素(GnRH)或人绒毛膜促性腺激素(HCG)处理黄体早期阶段西门塔尔肉牛对血清激素水平和繁殖性能的影响,本试验选择繁殖机能正常的母牛60头,随机分为3个组,每组20头,进行同期发情和人工授精,人工授精后5 d,GnRH组母牛肌肉注射GnRH(200μg/头),HCG组每牛肌肉注射HCG(3000 IU/头),对照组母牛注射生理盐水。于人工授精后5和14 d检测各组母牛血清孕激素(P4)、雌二醇(E2)和干扰素-tau(IFNT)水平;人工授精后45 d进行妊娠诊断,统计受胎率;母牛分娩后统计产犊率和犊牛初生重。结果显示,GnRH组和HCG组母牛人工授精后14 d,血清P4和IFNT水平均显著高于对照组(P<0.05),血清E2水平显著低于对照组(P<0.05);GnRH组和HCG组母牛受胎率、产犊率和犊牛初生重均高于对照组,但差异不显著(P>0.05)。结果表明,GnRH或HCG处理黄体早期阶段西门塔尔肉牛,可显著提高血清P4和IFNT水平,显著降低血清E2水平,且受胎率升高了10%~15%。本试验结果可为提高肉牛繁殖效率和促进高效生产提供一定的参考依据。To investigate the effects of gonadotropin-releasing hormone(GnRH)or human chorionic gonadotropin(HCG)treatment during the early luteal phase on serum hormone levels and reproductive performance in Simmental beef cattle,60 reproductively normal cows were randomly divided into three groups(n=20 per group).After estrus synchronization and artificial insemination(AI),cows in the GnRH group were intramuscularly injected with GnRH(200µg/head)on day 5 post-AI,while those in the HCG group received an intramuscular injection of HCG(3000 IU/head).The Control group received physiological saline.Serum progestin(P4),estradiol(E2),and interferon-tau(IFNT)levels were measured on days 5 and 14 post-AI.Pregnancy diagnosis was conducted on day 45 post-AI,and pregnancy rate,calving rate,and calf birth weight were recorded.The results showed that on day 14 post-AI,serum P4 and IFNT levels in the GnRH and HCG groups were significantly higher than those in the Control group(P<0.05),while serum E2 levels were significantly lower(P<0.05).Pregnancy rate,calving rate,and calf birth weight were higher in the GnRH and HCG groups than in the Control group,although the differences were not statistically significant(P>0.05).These findings indicate that GnRH or HCG treatment during the early luteal phase significantly increases serum P4 and IFNT levels while significantly decreasing serum E2 levels,leading to a 10%-15%increase in pregnancy rate.This study provides a reference for improving beef cattle reproductive efficiency and promoting high-efficiency production.

关 键 词：促性腺激素释放激素(GnRH) 人绒毛膜促性腺激素(HCG) 母牛 孕激素 受胎率 

分 类 号：S823.8[农业科学—畜牧学]