母猪背膘厚度与繁殖性能的关系研究

Study on the Relationship Between Sow Backfat Thickness and Reproductive Performance

本试验旨在探讨纯种母猪和杂种母猪背膘厚度对繁殖性能的影响。通过分析不同胎龄美系大白猪和长大二元母猪的背膘厚度变化,探讨了上产床背膘厚度对美系大白猪和长大二元母猪总产仔数、产活仔数、仔猪出生窝重及断奶窝重的影响。结果显示,美系大白猪的背膘厚度随着胎龄的增加呈现先降低再升高再降低的趋势;长大二元母猪的背膘厚度呈现先升高再降低再升高的趋势。上产床背膘厚度16~19 mm的美系大白猪总产仔数、健仔数、仔猪出生窝重及断奶窝重均显著高于其他组(P<0.05);上产床背膘厚度在16~19 mm的长大二元母猪总产仔数、健仔数、仔猪出生窝重均高于其他组,仔猪断奶窝重显著高于其他组(P<0.05)。

The article investigated the ffect of backfat thickness on the reproductive performance of purebred and crossbred sows.We analyzed the changes in backfat thickness of purebred and crossbred sows at different gestational ages,then investigated the effects ofbackfat thickness on total litter size,live liter size,liter weight at birth and weaning litter weight of purebred and crossbred sows in theupper farrowing bed.The resuts showed that the backfat thickness of purebred sows tended to firstly decrease,then increase,and thendecrease as the gestational age increased;the backfat thickness of backfat thickness tended to increase,then decrease and then in-crease.The total liter size,number of healthy piglets,liter weight at birth and liter weight at weaning were all significantly higher inpurebred sows with backfat thickness between 16~19 mm in the upper farrowing bed than in the other groups(P<0.05);the total liter size,number of healthy piglets and litter weight at bith were all higher than other groups,and liter weight at weaning was significantlyhigher(P<0.05)in crossbred sows with backfat thickness between 16~19 mm.