早期限饲对肉仔鸡生产性能与肥度的影响

将 2 2 0只艾维茵肉仔鸡随机分为 4组 ,每组 5 5只 ,分别为限饲组 R1 ,R2 ,R3 和对照组 R0 。 4组鸡1～ 7日龄均为自由采食 ,从 8日龄起 R1 ,R2 和 R3组分别饲喂自由采食量约 5 0 %的饲粮 ,分别限饲 1,2 ,3d后恢复自由采食。结果表明 ,R1 组鸡 6周龄体重、平均日增重、料肉比、胴体产量和腹脂量略低于 R0 组 (P>0 .0 5 ) ;R2 和R3 组 6周龄体重、平均日增重、腹脂量及腹脂率均显著低于 R0 组 (P<0 .0 5 ) ,料肉比、胴体产量略低于 R0 组(P>0 .0 5 ) ;早期限饲可降低一些代谢疾病的发生率及死亡率

Effect of early feed restriction on production performance and abdominal fat pad of broilers

The experiment was conducted with broilers to determine the effect of early feed restriction and realimentation on growth rate,feed efficiency,carcass yield and abdominal fat pad at 6 weeks of age.220 Avian broiler chicks of 1 day of age were divided into 4 groups,each of 55,numbered as restriction groups R 1,R 2 and R 3,and control group R 0 respectively.From 1-7 days of age,each group was provided feed ad libitum ,then R 1,R 2 and R 3 was provided about 50% feed ad libitum for 1,2 and 3 d respectively,then realimented with ad libitum ,feed intake.The results showed that,compared with R 0 birds,average body weight,average daily gain,feed/gain,carcass yield and abdominal fat weight of R 1 birds at 6 wk age were slightly lower ( P >0.05);the average body weight,average daily gain and abdominal fat weight of R 2 and R 3 birds at 6 wk age were significantly lower ( P <0.05),the feed/gain and carcass yield were slightly lower.The results also demonstrated that early feed restriction could reduce incidence and mortality of some metabolic diseases in broilers.