饲粮粗蛋白与赖氨酸水平对高产泌乳母猪繁育性能的影响

Effect of dietary protein or lysine level on reproductive and fostering performance for sows nursing large litters:

30头中国肉猪新品系DⅢ系和DⅢ Ⅰ系平均胎次为 4 .6 7胎 ,平均产活仔数 12 .50头 ,平均产后体重 2 0 6kg的高产泌乳母猪 ,依据品种、胎次、产活仔数等相一致的原则 ,随机分为 5个组 ,研究 5种粗蛋白水平分别为 11.5% ,13.8% ,15.9% ,18.0 %和 2 0 .2 % ,相应的赖氨酸为 0 .6 1% ,0 74 % ,0 .87% ,1.0 %和 1.12 %的 5种等能饲粮对母猪繁殖性能和仔猪生长发育的影响。结果表明 :饲粮营养水平影响母猪的采食量 ;随着蛋粗白和赖氨酸摄入量的提高 ,母猪泌乳期失重减少 (P<0 .0 5) ,并缩短了断奶至再配种间隔时间 ,但不影响断奶窝仔数。仔猪 2 1日龄和 35日龄的个体重和窝重均随饲粮粗蛋白摄入量的提高而呈线性增加 (P <0 .0 5或P <0 .0 1) ,第 4组饲粮达到高峰。即日摄入粗蛋白 86 8.0g、赖氨酸 4 8.

Thirty sows,Zhejiang white DⅢline and DⅢ Ⅰline (average parity 4.67,average litter size 12 50,average weight after parturition 206 kg )were used to study the effects of five dietary proteins or five lysine levels on reproductive and fostering performance during lactation period. The protein levels were 11.5%,13 8%,15 9%,18.0%,20.2% and lysine levels in these diets were accordingly 0.61%,0.74%,0.87%,1.00%, 1 12%.The results suggested that the feed intake of sows was affected by the dietary protein level. With the protein and lysine intake increased ,the body weight loss of sows during lactation period decreased ( P <0 05),and the interval between weaning and re breeding tended to shorten. But there was no significant difference in litter size. The piglet and litter weight on d 20,35 increased with increasing dietary protein or lysine intake( P <0.05 or P <0.01).They reached the maximum in diet 4.The best reproductive and fostering performance can be achieved when the sows receive 868.0 g protein , 48.3 g lysine daily.