深部输精对母猪繁殖性能的影响

 试验以78头经产大白母猪为试验材料，采用深部输精技术，以探明深部输精对母猪繁殖性能的影响。试验分三个处理组：第Ⅰ组采用常规输精方法，输精次数3次；第Ⅱ组采用深部输精方法，输精次数3次；第Ⅲ组采用深部输精方法，输精次数为2次。试验结果：常规输精组（第Ⅰ组）和深部输精组（第Ⅱ组）比较，窝均产仔数、窝均产活仔数和窝平均产健仔数分别为11.39头、11.84头、10.52头，和12.40头、11.07头、10.43头，窝均产仔数深度输精高于常规输精，经分析二者达到显著水平（P＜0.05），而窝均产活仔数和窝均产健仔数差异不显著（P＞0.05）；健仔率比较，常规输精组为91.54%，深部输精组为84.84%，二者差异达到显著水平（P＜0.05）；深度输精三次（第Ⅱ组）和深度输精两次（第Ⅲ组）相比母猪繁殖性状指标间差异均不显著（P＞0.05）。试验结果表明：深部输精可以提高母猪的窝均产仔数，但不能提高窝均产活仔数和健仔数，同时深部输精降低健仔率。

Deep Insemination Techniques on Reproductive Performance of Sows

The effects of deep insemination on sows reproductive performance were investigated.Seventy-eight large white female sows were randomly divided into 3 groups.Group 1 was inseminated with conventional method for 3 times.Group2 used deep insemination for 3 times.While group 3 used deep insemination for 2 times.The results showed that the mean total litter size of Group 2 by 12.40 was significantly higher than that of Group 1 by 11.39(P<0.05).However,the mean total alive litter size of Group 2 by 11.84 and Group 1 by 11.07 had no significant difference,and the mean healthy piglets of Group 2 by 10.52 and Group 1 by 10.43 had no significant difference(P>0.05).The rate of healthy piglets of Group 1 by 91.54% was significantly higher than that of Group 2 by 84.84%(P<0.05).Furthermore,sows reproductive performance indicators of Group 2 had no significant difference with that of Group 3(P>0.05).These results suggested that deep insemination was favorable for the mean total litter size of sows and decreased the rate of healthy piglets.