提高母猪繁殖性能的综合技术研究

Development of Comprehensive Technology of Sows Reproductive Performance Improvement

为探索提高母猪繁殖性能的综合技术,研究外源性激素(促黄体素释放激素A3和催产素)处理和低剂量深部输精法对母猪配种率、平均产仔数、活仔数以及弱仔数的影响。结果表明,肌注促黄体素释放激素A3能显著提高母猪的平均产仔数和活仔数(P<0.05);精液中添加催产素能够在一定程度上提高母猪的配种率、平均产仔数、活仔数(P>0.05);深部输精技术能够显著提高母猪的平均产仔数及活仔数(P<0.05),且采用低剂量深部输精法可获得与常规剂量深部输精法相近的繁殖效果(P>0.05)。利用上述激素处理技术和低剂量深部输精法可提高母猪的繁殖性能,在实际生产中具有一定的推广应用价值。

In order to develop a set of comprehensive technology to improve the reproductive performance of sows, the effects of exogenous hormones treatments [luteinizing hormone releasing hormone A3 （LHRH -A3） and oxytocin]and deep cervicalinsemination （low semen volume） on sows pregnancy rate, average litter size, live litter size, and weak litter size were assessed. The results showed that the sows receiving intramuscular injection of LHRH-A3 had significantly higher average litter size and live litter size （P〈0.05）; the sows inseminated using the semen added with oxytocin showed higher pregnancy rate, average litter size, and live litter size （P〉0.05）; the application of deep cervical insemination technique in sows significantly increased the average litter size and live litter size （P〈0.05）, and no significant differences in reproductive performance between the sows inseminated with low and normal semen volume were observed （P〉0.05）. The comprehensive technology of exogenous hormones treatments and deep cervical insemination with low semen volume developed in this study improves the reproductive performance of sows, which has a good popularizing value in practical production.