USE OF COMMERCIAL PHYTASE ENZYME ON GROWTH PERFORMANCE OF BROILER

Abstract

A total of 120 day-old Cobb 500 broiler chicks were reared in Sher-e-Bangla Agricultural University Poultry Farm, Dhaka. The present study was designed to evaluate the productive performance and health status of commercial broiler chicks fed diet containing phytase enzyme compared to base diet. The aims of the present study were to investigate the influence of a phytase enzyme on the growth performance of broiler, Body weight, Feed intake, FCR, carcass merits and P status of broilers (tibia ash contents) of male and female broiler were compared to control feeding of broiler. A total of 120 day-old Cobb 500 chicks were used in this experiment. Chicks were divided randomly into 4 experimental groups of 3 replicates (10 chicks with each replications). One of the 4 experimental group was fed this diet as control while, the remaining Three groups were fed diet mixed with 3 categories of phytase enzyme (fungal, bacterial mixed fungal and bacterial). Here this study T xi 1 = (control), T

= (Bacterial phytase enzyme), T 3 = (Combied Bacterial and fungal phytase enzyme) and T 2 = (fungal phytase) . The duration of experiment work 28 days. Results of the experiment showed that addition of phytase diets improved (P<0.5) broilers growth performance and tibia ash content percent with impact starting from the beginning of the fourth week of the feeding trial. However, it has no effect on feed intake. Feed conversion ratio and dressing percent were increased (P<0.05) in birds fed diets supplemented with phytase. Phytase supplementation had no significant effect on both male and female carcass cuts compared to control. To investigated the effect microbial phytase supplementation of microbial phytase specially mixed fungal and bacterial phytase in starter and finisher diets of broilers(1.5+0.1) g /100 kg of the feeds proved to be beneficial for increasing the growth performance of broiler, P status of broiler(tibia ash contents).