集约化猪场长大母猪繁殖性状的相关分析

Correlations Analysis of Reproductive Properties of Sows (Landrace×Yorkshire) Year-Round in Intensive Pig Farm

本文对1020头长大母猪，2107胎次的若干繁殖性状进行了统计分析。结果表明，母猪的不同胎次对产仔数、合格产仔数、平均个体初生重均有显著影响；3～7胎次的母猪繁殖性能比较稳定，明显优于其它胎次（P〈0．05）；夏季和早秋的高温对母猪受胎率的影响表现为受胎率下降、不合格仔猪发生率上升、平均个体初生重减小；母猪的乳头数与断奶头数、断奶个体重均呈显著的正相关；总产仔数、产活仔数与断奶个体重呈负相关。本研究将为改进规模化猪场的技术管理、确定母猪的利用年限、提高母猪生产水平和生产效益提供参考。

In order to investigate reproductive properties of sows （Landrace × Yorkshire） year-round in the intensive pig farm in Fujian province, 1020 sows and 2107 litters produced by the sows in different parturition times were tracked and recorded their pregnancy rate, litter size at birth and weaning, body weight of piglets at birth and weaning, teat number of each sow, interval of littering. All the data collected was analysed by SPSS. The results show that litter size and body weight of piglets at birth are significantly different in different parturition times, reproductive properties of the sows from the 3rd to the 7th parturition have better stability and predominance （P〈0.05）. Pregnancy rate of sows and body weight of piglets at birth decreased slightly while the rate of unqualified litter size increased slightly in hot summer and early autumn. The correlation are positive between teat number and size, body weight of piglets at weaning. The correlation are negative among total litter size, alive litter size, and body weight of piglets at weaning. The results will improve the technical management in the intensive pig farm to enhance sows＇ reproductive potential performences.