Nutritional characteristics and use the residue of sweet potato in slow growth broiler diets

Abstract

Three experiments were conducted in the poultry sector of the Federal University of Tocantins - Campus of Araguaina, to determine the energy and nutritional values of the residue of ethanol production from sweet potato (RBD) and its use in slow growth broiler diets. In the first experiment was conducted a metabolism trial to determine the apparent metabolizable energy (AME) and corrected for nitrogen balance (AMEn) and apparent metabolizable coefficients of the residue using the method of total excreta collection, in a completely randomized design with two treatments: basal diet and test diet (70% reference diet + 30% inclusion of the residue of sweet potato) four replications and ten birds per experimental unit. The RBD used showed: 24.64% of crude protein (CP), and 2732 kcal / kg and 2547 kcal / kg as the determined values for AME and AMEn on the natural material respectively. The others experiments were conducted to evaluate the inclusion (0%, 6%, 12% and 18%) of RBD in slow growth poultry diets, evaluating the performance characteristics and metabolism. The inclusion levels did not affect feed intake, but there was a reduction in weight gain(WG) and worse feed conversion(FC). The coefficients of metabolizable nitrogen and mineral matter presented quadratic performance with maximum points from 6.38% and 5.17% respectively. The RBD can be included in slow growth poultry diets to the level of 1,041%.