Abstract:In order to study the effects of different combination of regulating facts on growth performance,carcass traits and meat quality in broilers,630 one-day-old healthy avian broilers were randomly assigned into 21 groups (including one control treatment),the control treatment was fed by normal diet,and the rest 20 treatments were fed by fifteen kinds of experimental diets.Each of three experimental factors (compound vitamins,compound trace elements and compound active additives) was designed to 5 levels.After 49-days’ growth trail, the mean weight of broilers,the feed efficiency of broilers,breast muscle/live weight of broilers,and the abdominal fat rate,the pH value,the water holding capacity,intramuscular fat,crude protein of meat in each treatment were better than those of the control treatment (P<0.01).The multi-parameters comprehensive evaluation and optimization of mathematical models showed that the carcass and meat quality of broiler were the best when three compound additives in the diet was 1 672.64 mg/kg compound vitamins (VE 254.91,VC 283.23,VA 4 248.51,VH 0.43),2 888.10 mg/kg compound trace elements(Fe 77.84,Cu 90.81,Mn 116.75,Cr 0.78,Zn 142.70,Se 0.193),and 1 885.01 mg/kg compound active additives(betaine 1 767.53,allitridum 81.40 ),respectively.These results indicated that the optimal ratio of basic nutritional factors and regulatory factors could improve carcass traits and the meat quality of broiler.