畜牧与兽医2024，Vol.56Issue(1)：6-12,7.
外源激素处理提高小尾寒羊和蒙古羊春季繁殖力的研究
Improving fertility in spring for Small-tailed Han sheep and Mongolian sheep by exogenous hormone treatment
摘要
Abstract
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.关键词
小尾寒羊/蒙古羊/同期发情/人工授精/生殖激素Key words
Small-tailed Han sheep/Mongolian sheep/estrus synchronization/artificial insemination/reproductive hormone分类
农业科技引用本文复制引用
邓宇,赵瑞霞,李宝栋,刘树才,荣迪,阿拉坦莎,李巍巍,赵禹凯..外源激素处理提高小尾寒羊和蒙古羊春季繁殖力的研究[J].畜牧与兽医,2024,56(1):6-12,7.基金项目
内蒙古农牧业青年创新基金项目(2021QNJJMO3) （2021QNJJMO3）
