本文通过饲养屠宰试验研究了肉仔鸡体组成及体组分间的异速生长关系，旨在为建立肉仔鸡生长预测模型奠定基础。试验选取180只体重相近的1日龄爱拔益加（AA）肉仔鸡按性别随机分为2个处理，每个处理5个重复，每个重复18只鸡。肉仔鸡采食NRC营养水平日粮，于1、7、14、21、28、35和42日龄08：00空腹称重后，每个重复选取接近重复平均体重的2只鸡进行屠宰试验。试验数据经曲线回归拟合，结果显示：幂函数方程能较好地描述肉仔鸡胴体重、羽毛重与活重，体水分、灰分、脂肪与体蛋白质，胴体水分、灰分、脂肪与胴体蛋白质，羽毛水分、灰分、脂肪与羽毛蛋白质间的异速生长关系，拟合方程经F检验，结果显示拟合方程均达到显著水平（P<0.01），各拟合方程的相关指数R2均在0.950以上，此结果表明，利用幂函数方程拟合得到的体组成及体组分间的异速生长方程来预测肉仔鸡体组成及体组分，结果较为可靠。

The allometric relationships between body composition and components in broilers were investigated to establish the growth model to predict the growth of broilers. One hundred and eighty one-day-old Arbor Acres (AA) broilers were randomly arranged into 2 treatments with 5 replicates of 18 chicks by sex. Broilers were fed the standard diet which was formulated according to requirements of National Requirement Council. At 1, 7, 14, 21, 28, 35 and 42 days old, after being weighed, two broilers with body weight near to the average weight of each replicate were chosen and slaughtered, and the body composition and components were determined. The trial data collected were fitted with curve regulation by statistical software. The results showed that the power function could well describe the relationships between carcass, feather and body weight, the relationships between body water, fat, ash and body protein, the relationships between carcass water, fat, ash and carcass protein, and the relationships between feather water, fat, ash and feather protein. The fitted equations were tested through F-test, and the results showed that the fitted equations were all significant (P<0.01), and the correlation indexes (R2) of fitted equations were all above 0.950. These results indicated that the fitted allometric equations with power function could be well used to predict the body composition and components of broilers.［Chinese Journal of Animal Nutrition, 2010，22（3）:564-570］