不同管理方式下临产母猪产仔性能的对比分析

试验研究了采用不同管理方式对临产母猪产仔性能的影响。选取某生态养殖场4栋猪舍共160头母猪分成8组进行对比试验，其中1、2组和5、6组为试验组，3、4组和7、8组为对照组。在正常饲养管理的基础上．将1、2组母猪提前1周赶入分娩室并肌注氯前列烯醇0．1mg／头；3、4组母猪提前1周赶入分娩室但不注射氯前列烯醇；5、6组母猪待能挤出奶后赶入分娩室并肌注氯前列烯醇0．1mg／头；7、8组母猪待到能挤出奶后赶入分娩室但不注射氯前列烯醇。结果表明：产前注射药物的母猪其产活仔数比不注射药物的母猪高且差异显著（P〈O．05），死胎和木乃伊胎比例显著下降（P〈0．05），而且母猪的分娩时间明显集中；挤出奶水时再进产房的母猪其产活仔数比提前1周再进产房显著增加（P〈0．05），死胎率和木乃伊胎率显著减少（P〈0．05）。可见，注射氯前列烯醇和待挤出奶水时再进产房的母猪均可提高母猪的窝均产活仔数，降低死胎率；试验5、6组的母猪产仔性能最佳。其次是7、8组。

Comparative Analysis on the Farrowing Performance of Parturient Sow under Different Management Methods

The effects of using different management methods on the farrowing performance of parturient sows were studied. 160 sows of 4 pig houses in a ecological farm were divided into 8 groups to make comparative test. Group 1, 2, 5 and 6 were used as experimental groups and group 3, 4, 7 and 8 were used as control groups. Based on the normal feeding and management, sows in group 1 and 2 were driven into the delivery room a week in advance and sows were injected with 0.1 mg cloprostenol per sow by intramuscular injection. The sows in group 3 and 4 were driven into the delivery room a week in advance, but cloprostenol was administrated. The sows in group 5 and 6 were driven into the delivery room after lactating and sows were injected with O. 1 mg cloprostenol per sow by intramuscular injection. The sows in group 7 and 8 were driven into the delivery room after lactating and sows weren＇t injected with cloprostenol. The results showed that the live litter size of sows with prenatal administration of cloprostenol was significantly higher than that without prenatal administration of cloprostenol （P〈O.05）, the proportion of stillbirth and mummy was significantly decreased （P〈O.O5）and the farrowing time was obviously concentrated. The live litter size of sows that were driven into the delivery room after lactating was significantly increased than that a week in advance （P〈O.05） and the proportion of stillbirth and mummy was significantly decreased （P〈O.05）. The average live litter size of sows that were injected with cloprostenol and driven into the delivery room after lactating could be increased and the proportion of stillbirth was decreased. The farrowing performance of sows in group 5 and 6 was the best, followed by group 7 and 8.