Influence of exogenous multi-enzymes in broiler chickens fed on maize-wheat-soybean meal-based diets

This study evaluated the effects of multi-enzyme (xylanase, mannanase, beta-glucanase, cellulase, pectinase, and amylase) supplementation on growth performance, nutrient digestibility, blood characteristics, relative organ weight, and breast muscle quality in broilers fed maize-wheat-soybean meal-based diets. A total of 800, one-day-old Ross 308 broiler chicks were randomly assigned to one of 4 treatments according body weight (body weight, 45.3 +/- 0.72 g) in a 35-day trail. Each treatment had 10 replicate cages with 20 birds per replicate cage. Dietary treatment groups were: (1) CON, maize-wheat-soybean meal basal diet; 2) ME60, CON + 60 mg/kg multi-enzyme; 3) ME120, CON + 120 mg/kg multi-enzyme; 4) ME180, CON + 180 mg/kg multi-enzyme. Increasing concentration of multi-enzyme had positive linear effects on body weight gain and feed conversation ratio from days 7 to 21, 21 to 35, and 1 to 35 (P<0.05). Supplementation with multi-enzyme did not affect feed intake throughout the experiment (P>0.05). Additionally, the apparent total tract digestibility of dry matter and crude protein increased linearly with increased levels of multi-enzyme (P<0.05). These data indicated that supplementation with 180 mg/kg multi-enzyme was effective for improving growth performance and nutrient digestibility in broilers fed with maize-wheat-soybean meal-based diets.