摘要
旨在研究春季对小尾寒羊、蒙古羊进行同期发情与人工授精处理时,不同外源激素使用对两品种羊繁殖指标和血液生殖激素浓度的影响。挑选春季小尾寒羊、蒙古羊母羊各120只,按不同外源激素处理方法随机均分为4组,其中对照组处理方法为阴道氟孕酮海绵栓(FGA)+撤栓后即注射孕马血清促性腺激素(PMSG),试验Ⅰ组为FGA+撤栓前24 h注射PMSG,试验Ⅱ组为FGA+撤栓前24 h注射PMSG+注射促黄体素释放激素A_(3)(LHRH-A_(3)),试验Ⅲ组为FGA+撤栓前24 h注射PMSG+注射LHRH-A_(3)+稀释精液中添加催产素(OXT)。结果:试验I组与对照组相比,蒙古羊放栓第14天孕激素(P_(4))浓度显著升高(P<0.05),卵泡刺激素(FSH)浓度和发情反应率均极显著升高(P<0.01);试验Ⅱ组与试验Ⅰ组相比,小尾寒羊产羔率极显著提高(P<0.01),蒙古羊放栓第14天FSH、促性腺激素释放激素(GnRH)浓度和同期受胎率均极显著升高(P<0.01),同期妊娠率显著提高(P<0.05);试验Ⅲ组与试验Ⅱ组相比,小尾寒羊放栓第14天雌激素(E_(2))浓度和同期妊娠率均显著升高(P<0.05),蒙古羊放栓第14天FSH浓度、同期受胎率和同期妊娠率均极显著下降(P<0.01)。综上可见,试验Ⅱ组(FGA+撤栓前24 h注射PMSG+LHRH-A_(3))对于提高蒙古羊春季繁殖力效果较好,试验Ⅲ组(FGA+撤栓前24 h注射PMSG+LHRH-A_(3)+OXT)对于提高小尾寒羊繁殖力效果较好。
The aim of this study was to identify the effect of varying the use of exogenous hormones on reproductive indicators and blood reproductive hormone concentration in Small-tailed Han sheep and Mongolian sheep in estrus in spring that receive simultaneous and artificial insemination.240 ewes of Small-tailed Han sheep and Mongolian sheep(120 of each breed)were selected and randomly divided into four experimental groups with different hormone treatments.The control group was treated with vaginal fluorogestrel sponge(FGA)+injection of pregnant horse serum gonadotropin(PMSG)immediately after sponge removal,experimental groupⅠwas treated with FGA+24 h pre-injection of PMSG,experimental groupⅡwas treated with FGA+24 h pre-injection of PMSG+injection of luteinizing hormone-releasing hormone A_(3)(LHRH-A_(3)),and experimental groupⅢwas treated with FGA+24 h pre-injection of PMSG+LHRH-A_(3)+oxytocin(OXT)in diluted semen.The results were as follows:When compared with the control group,the Mongolian sheep of experimental group I on the 14th day after sponge placement,showed significant increase in the progesterone(P4)concentration(P<0.05),and higher follicle stimulating hormone(FSH)concentration and estrus response rate(P<0.01);the Small-tailed Han sheep of experimental groupⅡpresented extremely significantly higher(P<0.01)lambing rate,extremely significantly higher(P<0.01)FSH and gonadotropin-releasing hormone(GnRH)concentrations and simultaneous conception rate on day 14 after sponge placement,and significantly higher(P<0.05)simultaneous pregnancy rate.Compared with experimental groupⅡ,the Small-tailed Han sheep of experimental groupⅢexhibited significantly higher(P<0.05)estrogen(E2)concentration and simultaneous pregnancy rate on day 14 after sponge placement,but Mongolian sheep showed extremely significantly lower(P<0.01)FSH concentration,simultaneous conception rate and simultaneous pregnancy rate.It can be seen that experimental groupⅡwith FGA+24 h pre-injection of PMSG+LHRH-A_(3) had better effect on improving fertility of Mongolian sheep,and experimental groupⅢwith FGA+24 h pre-injection of PMSG+LHRH-A_(3)+OXT showed better effect on improving fertility of Smalltailed Han sheep.
作者
邓宇
赵瑞霞
李宝栋
刘树才
荣迪
阿拉坦莎
李巍巍
赵禹凯
DENG Yu;ZHAO Ruixia;LI Baodong;LIU Shucai;RONG Di;Alatansha;LI Weiwei;ZHAO Yukai(Research Department of Animal Husbandry,Institute of Agricultural and Animal Husbandry Research of Chifeng City,Chifeng 024000,China;Center of Agricultural and Animal Husbandry Technology Promotion,Bureau of Agriculture and Animal Husbandry of Bahrain Right Banner,Chifeng 025150,China)
出处
《畜牧与兽医》
CAS
北大核心
2024年第1期6-12,共7页
Animal Husbandry & Veterinary Medicine
基金
内蒙古农牧业青年创新基金项目(2021QNJJMO3)。
关键词
小尾寒羊
蒙古羊
同期发情
人工授精
生殖激素
Small-tailed Han sheep
Mongolian sheep
estrus synchronization
artificial insemination
reproductive hormone
作者简介
第一作者:邓宇,女,硕士,副研究员;通信作者:李宝栋,蒙古族,副研究员,研究方向为动物营养与草食家畜繁殖,E-mail:307566223@qq.com。
