Effect of feed enzymes supplementation to corn-soya and deoiled rice bran based diet on performance of broiler chickens

In a completely randomized design the effect of certain feed enzymes supplementation on the growth, carcass yield, certain blood biochemical's and cost of production in broiler chickens fed diets based on maize-soy and deoiled rice bran was studied. Day old (n=384) broiler chicks were randomly distributed into 48 groups of 8 chicks each. Two basal diet (D1) and (D9) were formulated separately for each growth phases containing 0.45 and 0.35% available phosphorus(AP) for starting phase and 0.35 and 0.25% (AP) for finishing phase. The other nutrients composition was same in both basal diets during starting and finishing phase. The (D1) was the control diet having no supplementation of feed enzymes. The other eleven diets from (D2 to D12) were supplemented with certain feed enzymes @500mg/kg multi-enzyme, 20 mg/kg xylanase and 100mg/kg phytase. Each of such diet was offered to quadruplicate lot of 8 chicks each from 0-7wks of age. Body weight gain, feed intake and feed conversion efficiency did not improve significantly (P<0.05) over control diet during all growth phases due to enzyme supplementation. However, supplementation of phytase + multienzyme was found best among various combinations to improve growth and feed utilization in broiler chickens. Dressing yield percentage was significantly (P<0.01) higher with (phy+multi.) and (phy+multi+xyl) groups than those recorded in other dietary treatments. In most of the enzyme treated groups total protein, serum glucose and serum phosphorus were found comparable when compared with control diet. However, serum uric acid and calcium reduced (P<0.01) in most of the enzyme treated groups than that of control group. Feed cost/kg body weight gain in different enzyme treated groups were statistically similar to that of control diet except diet supplemented with phytase+ multienzyme +xylanase enzyme. Based on the results, it was concluded that supplementation of phytase and multienzyme in maize-soya and deoiled rice bran based diet of coloured broiler chickens was beneficial to improved growth performance, carcass yield and reduction of feed cost by saving of 0.1% available phosphorus.