%0 Journal Article %9 journal article %J Journal of Animal and Feed Sciences %@ 1230-1388 %V 9 %N 4 %D 2000 %F Osei2000 %T Effects of dietary enzyme on broiler chickens fed diets containing wheat bran %X Two hundred and eighty-eight 3-week-old mixed-sex broiler chickens were randomly divided into three dietary treatment groups and fed diets containing 0, 100 or 200 g/kg of dietary enzyme, respectively, for four weeks. Feed and water were supplied ad libitum . The parameters studied included growth rate, feed consumption, feed conversion ratio, carcass evaluation, and the economics of production. The addition of dietary enzyme significantly reduced feed consumption (P<0.05); on the other hand, feed conversion efficiency and growth rate improved significantly with increasing levels of enzyme incorporation (P<0.05). The reduction in feed intake compared with birds on the control diet ranged from approximately 10 to 15%. At seven weeks of age, birds on the 100 g/kg and 200 g/kg enzyme were respectively 1.9 and 5.8% heavier than their counterparts on the diet with no added enzyme. Birds fed diets containing the highest level of enzyme were 21.1% more efficient in converting feed to body constituents. Carcass dressing percentage increased significantly with added enzyme (P<0.05). Dietary enzyme significantly decreased the total cost of feed per bird and the cost per kg gain. Enzyme added at 200 g/kg diet was the most economical. %A Osei, S. A. %A Oduro, S. %P 681-686 %R 10.22358/jafs/68118/2000 %U https://doi.org/10.22358/jafs/68118/2000