【摘要】 利用最小二乘法对温带气候条件下874窝杜洛克和659窝大约克母猪的繁殖性状数据进行统计分析。结果表明:胎次、季节对杜洛克和大约克母猪的断奶再发情间隔、产仔数、21日龄窝重等繁殖性状影响显著(P<0.05);哺乳期对杜洛克和大约克母猪的断奶再发情间隔影响显著(P<0.05)。母猪1~7胎繁殖性状呈现先升高后降低的趋势,随着哺乳期的延长母猪断奶再发情间隔先减少后增加,夏季高温高湿对母猪产生热应激,影响其生长性能的发挥。在生产中,加强对初产和六胎以上的母猪饲养管理,及时淘汰老龄母猪,在夏季做好母猪的防暑降温等工作,推荐采用21~28d断奶。更多还原

【Abstract】 In the study,least square means were used to analyze the productive traits of 874 litters of Duroc and 659 litters of Yorkshire in a temperate climate.The result indicated that parity and season had significant effect on WCI,TNB,LW21 at 5% or 1% level,and length of lactation had significant effect on WCI at 5% level.During 1 to 7 parity,the productive traits increased firstly,then it decreasd.With the length of lactation prolonged,WCI increased firstly,then it decreased too.Sows have heat stress in the high temperature and humidity of summer,and can’t acquite themselves splendidly.In production,feeding and management to the first and above 6 parities sows should be strengthened,and the older sows should be culled in time.In summer,sutable measures should be taken to prevent heatstroke.Weaning on the days 21～28 days after parturation are recommended.更多还原