average daily feed intake had little change among the three groups (p>0.05).
日耗料量各组间差异不明显(p>0.05)。
the results shown that:(1) daily weight gain(dg), daily feed intake and feed conversion ratio (fcr) were positively correlated to body weight, but sgr and daily feeding rate negatively;
the experimental results were as follows:1, average daily gain (adg) and average daily feed intake (adfi) and f/g changed with the elevated protein levels quadratically.