Effects of different levels of canola meal peptides on growth performance and blood metabolites in broiler chickens

This study was conducted to evaluate the effects of canola meal peptides (CMP) on growth performance, blood metabolites, and antioxidant activities in broiler chickens. A total of 250 one-day-old male broiler chickens were randomly allocated to 5 dietary treatments with 5 pens and 10 broiler chickens in each pen. The broiler chickens were fed the basal diets supplemented with 0, 100, 150, 200, or 250 mg CMP/kg for 42 d. With increasing the supplementation of CMP in the basal diet, body weight gain increased and feed conversion ratio decreased both linearly and quadratically from d 0 to 42 (P < 0.01). Supplementation of the basal diet with CMP increased (linear, P < 0.01) serum lysozyme and superoxide dismutase activities and immunoglobulin M concentrations at d 42. Serum cholesterol and triglyceride concentrations decreased linearly and quadraticaly (P < 0.01), but total protein increased linearly and quadratically (P < 0.01) and P and Ca increased linearly (P < 0.01) as dietary supplementation of CMP increased from 0 to 250 mg/kg at d 21 and 42. The results indicated that the dietary supplementation of CMP can increase performance, blood metabolites, and antioxidant activities in broiler chickens.