苏太猪不同胎次繁殖性能的比较分析

摘要

本试验对苏太母猪核心群不同胎次的繁殖性能进行比较,并对后备猪的初生重、35日龄断奶重、4月龄重和6月龄重等早期生产性能与后期繁殖性能之间的关系进行分析,旨在进一步了解苏太猪的繁殖性能,为苏太后备母猪的选种提供指导.结果表明,第1胎产仔数最少,成活率最低,第4胎成活率最高,至第3胎达较高水平并一直稳定保持至第6胎,第3胎的繁殖性能可以作为淘汰母猪的重要依据.后备猪35日龄断奶重与4月龄重、6月龄重都呈极显著正相关,4月龄重和6月龄重间也具有极显著正相关关系,苏太后备母猪早期生产性能与后期繁殖性能没有显著相关,选择35日龄断奶重小的母猪留种更加经济.%It had compared reproductive performance of Sutai pigs with different litters,as well as shown relationships between some parameters in gilts,such as birth weight,weaning weight (35 days) ,4 month weight and 6 month weight,and their reproductive performance. The study aimed to further understanding of the Sutai pigs' reproductive performance,and to guide the selection of gilts. The results showed that both litter size and survival rate of primiparous sows were lowest in subsequent parities (up to parity 6) when litter 4 had the highest survival rate. Reproductive performance of sows had been stabilized, at a higher level from litter 3,which could be an important basis in eliminating gilts. Sutai gilts' weaning weight (35 days) had significant effect on both 4 month weight and 6 month weight. 6 month weight was also significantly influenced by 4 month weight. However,the relationship between early performance in sows and their subsequent reproductive performance was not significant. Therefore it was much economical of selecting gilts with little weaning weight (35 days) than others.