| 摘要: |
| 将220只艾维菌肉仔鸡随机分为4组，每组55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50％的饲粮，分别限饲1，2，3 d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＞0．05）；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＜0．05），料肉比、胴体产量略低于R0组（P＞0．05）；早期限饲可降低一些代谢疾病的发生率及死亡率。 |
| 关键词: 生长速度 腹脂量 早期限饲 肉仔鸡 |
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| Effect of early feed restriction on production performance and abdominal fat pad of broilers |
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| Abstract: |
| 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 R1,R2 and R2,and control group R0 respectively.From 1-7 days of age,each group was provided feed ad libitum,then R1,R2 and R3 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 R0 birds,average body weight,average daily gain,feed/gain,carcass yield and abdominal fat weight of R1 birds at 6-wk-age were slightly lower (P>0.05);the average body weight,average daily gain and abdominal fat weight of R2 and R3 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. |
| Key words: growth rate abdominal fat pad early feed restriction broilers |
