母猪妊娠期背膘厚度与体况评分及繁殖性能的关系

利用2 552胎约克夏母猪的历史繁殖数据,分析背膘厚度与体况评分,分别对初产母猪和经产母猪不同妊娠阶段的背膘厚度与繁殖性状进行相关分析。结果表明,体况评分法并不能准确地评判妊娠母猪背膘厚度,更不能反映母猪繁殖性能的高低。初产母猪不同妊娠期的背膘厚度和主要繁殖性状无显著相关性。经产母猪不同妊娠阶段的背膘厚度与繁殖性状显著相关(P<0.05),妊娠期背膘厚度变化量与繁殖性状显著相关(P<0.05)。回归分析表明,为使经产母猪繁殖性能达到最佳,妊娠期间母猪的背膘厚度应控制在10~14 mm,并且保持相对稳定。在妊娠期不同阶段应根据母猪背膘厚度进行精确饲喂,以确保母猪达到最佳背膘厚度,并在整个妊娠期维持相对稳定,这样有利于母猪繁殖性能的提高。

Effect of backfat thickness on body condition score and reproductive performance of sows during pregnancy

Historical reproductive data of 2 552 Yorkshire sows were used to analyze the relationship between backfat thickness and body condition score and main reproductive traits and correlation analysis was carried out on the thickness and reproductive traits of primiparous sows and sows at different stages of pregnancy. The results showed that the body condition scoring method could not accurately judge the backfat thickness and reproductive performance of sows. There was no significant correlation between the backfat thickness and the main reproductive traits at different gestation stages of primiparous sows. The backfat thickness in different stages of multiparous sows was significantly (P<0.05) correlated with reproductive traits. The variation of backfat thickness during pregnancy was significantly (P<0.05) correlated with reproductive traits. According to the regression analysis, in order to optimize the reproductive performance of the sows, the backfat thickness of sows during pregnancy should be controlled within the range of 10-14 mm, and kept stable during gestation period. Precise feeding should be carried out according to the thickness of the sow's backfat at different stages of pregnancy to ensure that the sows could reach the optimal backfat thickness range and maintain relatively stable throughout the pregnancy, and it will be helpful to improve the reproductive performance of sows.