Effect of different levels of wheat bran with and without enzyme on growth performance and carcass traits of broiler chickens

This study was conducted to evaluate the effects of different levels of wheat bran with or without enzyme on growth performance and carcass traits of broiler chickens. Total 320 commercial male broiler chicks (Ross 308) with equal weight were divided between 8 treatments with 4 replicates and 10 birds for each. Treatment consists of four levels of wheat bran (0، 10، 15 and 20 percent) and two levels of commercial multi enzyme (0 and 0. 05 percent) respectively. On day 42، 8 birds from each treatment were slaughtered and various organs weighed separately. Data were analyzed as a factorial experiment (4×2) based on completely randomized design. The results showed including wheat bran in the diets had significant effect on performance traits. Feed intake was significant between treatments and the diets with enzyme had a higher feed intake. The weight gain and feed conversion ratio (FCR) of broilers was affected (P<0. 05) by the levels of wheat bran. Adding enzyme to diets improved weight gain and FCR significantly (P<0. 05). Highest weight gain and lower FCR observed in diets with enzyme. The effect of wheat bran on carcass components showed that use of wheat bran increased the gizzard and abdominal fat weights (P<0. 05). Adding the enzyme was also significantly reduced the weight of the proventriculus (P<0. 05). The results of this experiment showed that we can use wheat bran as part of protein source in the diet of broiler.