饲喂大豆异黄酮对母猪繁殖性能及哺乳仔猪生长的影响

66头大约克夏母猪和52头二花脸母猪分别按预产期不同间隔地分成试验组和对照组。在试验组大约克夏和二花脸母猪妊娠85d至产后7d间,于基础日粮中分别添加大豆异黄酮8mg/kg和5mg/kg。结果表明,仔猪初生个体重和窝重,同一猪种内试验组与对照组无显著差异(P>0 05),但试验组有增高的趋势;20日龄大约克夏仔猪个体重和窝重,试验组比对照组分别高1 38kg和14 30kg,差异均达极显著水平(P<0 01);20日龄二花脸仔猪个体重和窝重,试验组与对照组差异均不显著(P>0 05)。大约克夏仔猪断奶时(28日龄)个体重和窝重,试验组分别比对照组增加1 21kg和12 23kg,差异均达显著水平(P<0 05);二花脸仔猪断奶时(45日龄)个体重和窝重,试验组比对照组分别增加0 51kg和6 01kg,差异均达显著水平(P<0 05)。同时,大豆异黄酮对大约克夏和二花脸母猪下一胎次的繁殖性能均无不良影响。

Effects of Feeding Soy Isoflavone on the Reproductive Performance of Sows and Growth of Piglets

Sixty-six Large White and Erhualian sows were assigned into treatment and control groups separately by different expected date of confinement. In treatment group, soy isoflavone was fed at the dose of 8 mg/kg and 5 mg/kg during the time from 85 days of pregnancy to 7 days after farrowing. The results showed there was no significant difference at individual weight and litter weight of newborn piglets of the same breed (P>0.05) and the weight in treatment group had an increasing tendency. At 20-day-weaning age, the individual weight and litter weight of Large White piglets were higher than those of control by 1.38 kg and 14.30 kg, respectively, and the difference was very significant (P<0.01). But those of Erhualian piglets between two groups were not significant difference (P>0.05). At 28-day-weaning age, those of Large White piglets were higher by 1.21 kg and 12.23 kg, respectively, and showed significant difference (P<0.05). At 45-day-weaning age, those of Erhualian piglets were higher by 0.51 kg and 6.01 kg, respectively, and showed significant difference (P<0.05), too. Meanwhile, the results also showed there was no negative effect on reproductive performance by feeding soy isoflavone.