断奶至配种间隔时间对法系长白母猪繁殖性能的影响

Effect of Interval between Weaning and Mating on Reproduction Performance of French Landrace Sows

以法系长白母猪1 219窝次的生产繁殖成绩为研究对象,分析断奶至配种间隔时间对母猪繁殖性能影响。结果表明,75.88%的长白母猪在断奶后0-7 d发情配种,平均断奶至配种天数为4.33 d,平均分娩胎次为4.66胎,产活仔数、总产仔数、断奶仔猪数、21日龄断奶窝重、哺乳成活率都与最高组未形成显著差异。长白母猪繁殖性状间的相关性分析表明,偏相关系数有正有负,相关强度有大有小。其中,断奶至配种间隔天数与产活仔数、总产仔数间极显著负相关,偏相关系数分别为-0.076、-0.083,与其他指标相关性不显著。

In the study, reproduction performance data coming from 1 219 litters of French Landrace were collected, and the effect of interval between weaning and mating on reproduction traits were analyzed. The results showed that 75.88 percent sows were in estrus during 0-7 d after weaning, with the average of 4.33 d. The average parity was 4.66. Compared with the higher groups, no significant difference was observed in the traits of total number born, number born alive, litter weight at birth, number weaned, 21-day weaning weight, survival rate during lactation. The correlation analyses indicated that among these traits above, some partial correlation coefficients were positive, and some were negative. Some correlation coefficients were large, and some were small.Additionally, interval between weaning and mating was significantly negatively correlated with number born alive and total number born, with the partial correlation coefficients of -0.076 and -0.083, respectively, and no significantly correlated with other traits.