定时输精对母猪繁殖性能的影响

发布时间：2018-08-15 11:43

【摘要】：为了研究同期发情+定时输精对母猪发情率、妊娠率及产仔数的影响。试验1:将200头后备母猪随机分成两组,每组100头。所有后备母猪连续饲喂四烯雌酮(ATL)(15 mg/d)14 d,第15 d开始查情。试验组后备母猪停止饲喂ATL 24 h后肌注促性素(PMSG)、再过72 h肌注生源(Gn RH),肌注Gn RH 24 h后开始输精1次,过24 h再输精1次;对照组后备母猪停止饲喂四烯雌酮后有发情就开始输精,过24 h再输精1次(如还发情,第2次输精过24 h后再输精1次);试验2:将200头断奶母猪随机分成两组,每组100头,断奶第2 d开始查情。试验组断奶母猪断奶24 h后肌注促性素(PMSG),再过72 h肌注生源(Gn RH),肌注Gn RH 24 h进行输精1次,过24 h再输精1次;对照组断奶母猪发情就开始输精,过24 h再输精1次(如还发情,第2次输精过24 h后再输精1次);精液剂量为80 ml(2×109个精子细胞)。试验1结果显示,试验组的后备母猪的静立率(P0.05)、妊娠率(P0.05)、分娩率(P0.05)、窝产仔数(P0.05)均高于对照组。试验2结果显示,试验组的断奶母猪的发情率、妊娠率、分娩率均高于对照组(P0.05),窝产仔数也高于对照组。试验结果表明,母猪肌注PMSG和Gn RH,可改善母猪的发情率、分娩率、窝产仔数,减少隐性发情母猪的漏配率。
[Abstract]:To study the effect of synchronous estrus timing insemination on estrus rate, pregnancy rate and litter size of sows. Experiment 1: 200 back-up sows were randomly divided into two groups, 100 in each group. All the back-up sows were fed with tetraenestrone (ATL) (for 15 mg/d for 14 days, and the condition was investigated on the 15th day. In the test group, the back-up sows were fed with ATL for 24 h, and then injected (PMSG), intramuscularly for 72 h, then Gn RH for 24 h, then inseminated once again after 24 h. In the control group, the back-up sows stopped feeding tetraenestrone and began to inseminate after estrus, and then inseminated once after 24 hours (if the second insemination lasted for 24 hours). Experiment 2: 200 weaning sows were randomly divided into two groups, 100 in each group. The second day of weaning began to investigate the situation. The experimental group weaned sows after 24 h weaning, then injected probiotin (PMSG), intramuscularly for 72 h, then injected raw (Gn RH), intramuscularly for 24 h, then inseminated once after 24 h, while in the control group, the estrus of weaning sows began to inseminate. The semen dose was 80ml (2 脳 109 sperm cells) after 24 h insemination (if estrus was still in oestrus, once after 24 h insemination). The results of experiment 1 showed that the static standing rate (P0.05), pregnancy rate (P0.05), parturition rate (P0.05) and litter size (P0.05) of the trial group were higher than those of the control group. The results of experiment 2 showed that the estrus rate, pregnancy rate and delivery rate of weaning sows in the test group were higher than those in the control group (P0.05), and the litter size was also higher than that in the control group. The results showed that PMSG and GnRH could improve the estrus rate, parturition rate and litter size of sows, and reduce the leakage rate of recessive estrus sows.
【作者单位】：北京市SPF猪育种管理中心;
【分类号】：S828.3

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