Author:
Sa’adoon Waleed H.,Abbas Rabia J.
Abstract
Abstract
This study aimed at evaluating productive performance and some carcass characteristics of broiler chickens fed feeds containing different levels of soybean bioactive peptide (SBP), and vitamin E. 180 Ross-308 broiler chicks were divided equally into five treatments, each replicated three times, and twelve unsexed chicks were placed in each replicate in a completely randomized design. For a 35-day trial period, the basal diet was either supplied without supplements (control group), or it was supplemented with SBP at 2.5, 5.0, and 7.5 g/kg diet, or with vitamin E at 250 mg/kg feed. Results indicated that body weights at different ages were significantly (p≤0.05) higher in SBP groups during 2nd week (except 2.5 g/kg SBP), 3rd week, 4th week, and 5th week as compared with control and vitamin E groups. Gain in total body weight, ratio of feed conversion, and production index were improved significantly (P≤0.05) in SBP compared to other groups. The economic efficiency improved in the SBP and the vitamin E group than in control group. Feed intake, mortality rate, carcass yield, total giblets, total edible parts, liver, and heart yield were similar among groups. The highest (P≤0.05) carcass weight and breast yield were observed in the SBP than in other groups, while the gizzard relative weight in the vitamin E group achieved the highest significant value (3.22 %) as compared with SBP and control groups. Significant effect among treatment was observed in thigh yield. In compared to the control, 5 (g/kg) SBP showed the lowest (P≤0.05) abdominal fat percentage. The current findings suggested that the supplementation of broiler diets with SBP improved productive performance and some carcass traits.