外源激素处理提高小尾寒羊和蒙古羊春季繁殖力的研究OACSTPCD
Improving fertility in spring for Small-tailed Han sheep and Mongolian sheep by exogenous hormone treatment
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 24h注射PMSG,试验Ⅱ组为FGA+撤栓前24h注射PMSG+注射促黄体素释放激素A3(LHRH-A3),试验Ⅲ组为FGA+撤栓前 24h注射PMSG+注射LHRH-A3+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(P4)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(E2)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 24h注射PMSG+LHRH-A3)对于提高蒙古羊春季繁殖力效果较好,试验Ⅲ组(FGA+撤栓前24h注射PMSG+LHRH-A3+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 group Ⅰ was treated with FGA+24 h pre-injec-tion of PMSG,experimental group Ⅱwas treated with FGA+24 h pre-injection of PMSG+injection of luteinizing hormone-releasing hormone A3(LHRH-A3),and experimental group Ⅲ was treated with FGA+24 h pre-injection of PMSG+LHRH-A3+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 hor-mone(FSH)concentration and estrus response rate(P＜0.01);the Small-tailed Han sheep of experimental group Ⅱ presented 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 pregnan-cy rate.Compared with experimental group Ⅱ,the Small-tailed Han sheep of experimental group Ⅲ exhibited 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 group Ⅱ with FGA+24 h pre-injection of PMSG+LHRH-A3 had better effect on improving fertility of Mongolian sheep,and experimental group Ⅲ with FGA+24 h pre-injection of PMSG+LHRH-A3+OXT showed better effect on improving fertility of Small-tailed Han sheep.
邓宇;赵瑞霞;李宝栋;刘树才;荣迪;阿拉坦莎;李巍巍;赵禹凯
赤峰市农牧科学研究所畜牧研究室,内蒙古 赤峰 024000巴林右旗农牧业局农牧技术推广中心,内蒙古 赤峰 025150
畜牧业
小尾寒羊蒙古羊同期发情人工授精生殖激素
Small-tailed Han sheepMongolian sheepestrus synchronizationartificial inseminationreproductive hormone
《畜牧与兽医》 2024 (001)
6-12 / 7
内蒙古农牧业青年创新基金项目(2021QNJJMO3)
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