Effects of grinding and pelleting condition on efficiency of full-fat canola seed for replacing supplemental oil in broiler chicken diets

Abstract

Abstract Two experiments were conducted to investigate the effects of canola seed (CS) and processing including grinding and pelleting condition on bird performance and nutrient utilization. The first experiment examined the apparent metabolizable energy (AME) of CS. A reference and test diet containing 150 g/kg CS was used. AME and AMEn values of CS were 21.08 and 19.63 MJ/kg DM, respectively. The second experiment examined performance and digestibility and used a 2 × 3 factorial arrangement of treatments. Factors were: pelleting condition (cold-pelleted at 65 °C or steam-pelleted at 85 °C) and diet: canola meal plus oil, whole canola seed (WCS) or hammer-milled canola seed (HCS). A total of 672 male d-old Ross 308 broiler chicks were randomly assigned to treatments, each replicated eight times, with 14 birds per replicate. Birds received a common diet until d 10 when they were given test grower diets to d 24 followed by finisher diets from d 24 to d 35. Wheat-SBM based test diets were isoenergetic and isonitrogenous. Grower and finisher contained CS at 114 g/kg and 130 g/kg respectively, entirely replacing canola meal and canola oil in control diets. Inclusion of CS decreased feed intake (FI) relative to control diets from d 10 to 35 ( P P P P P P