THE EFFECT OF SUPPLEMENTING DIFFERENT LEVELS OF PHYTASE ENZYME ON PERFORMANCE, SOME CARCASS PROPERTIES AND ECONOMICS OF BROILER CHICKENS

Abstract

Plant origin feeds contain some important nutrients that are not available to poultry due to their inability to analyze them and benefit from them. An experiment was fulfilled to study the performance of broiler chicken using supplemented diets with four levels of phytase enzyme 0.0 FTU/kg feed (T1), 500 FTU/kg feed (T2), 1000 FTU/kg feed (T3) and 1500 FTU/kg feed (T4). A completely randomized design (CRD) using four treatments, with three replicates each with 12 Ross 308 male chicks, was performed. Results indicated significant (P≤0.05) differences in feed intake (FI), body weight (BW) and feed conversion ratio (FCR). The highest feed consumption was recorded with (T1), where (T4) recorded the highest body weight and best FCR followed by (T3, T2 and T1) respectively. There were significant (P≤0.05) differences in carcasses, gastrointestinal tract (GIT) and the associated parts weights, and some GIT organs lengths. However, other parts including heads, necks, shanks and abdominal fat weights were non-significantly (P>0.05) different. There were no significant (P>0.05) differences in individual sensory evaluation attributes (taste, flavor, color and tenderness), but there were significant differences in overall sensory evaluation. There were no significant differences in the mortality rates among treatments. However, there were significant (P≤0.05) differences in the economics appraisal were (T4) recorded the least cost and the highest revenue. It reveals that using the (1500FTU/kg) level of phytase enzyme had performance parameters and economic appraisal. It could be concluded that supplementing broiler chicken diets with (1500FTU/kg) is good for production performance and returns.