This project aims to evaluate the effects of levels of plant extracts in diets of broilers. Two experiments will be carried out, the I on performance, carcass characteristics, meat quality and antioxidant activity, using 900 broiler chicks, Cobb, in a randomized experimental causalizado with five treatments and six replications: DC = control diet without added and anticoccidial antibiotic; AMD = DC + antibiotic performance improver; AF5 = DC + phytogenic additives (0.05%); AF10 = DC + phytogenic additives (0.1%); AF15 = DC + phytogenic additives (0.15 %). And in the second experiment will be a metabolism trial to determine the coefficients metabolization of nutrients in the growth phase, using 90 male broilers. Diets will be formulated based on corn and soybean meal, according to the recommendations of Rostagno et al. (2011) in four phases: pre - starter, starter, grower and finisher. The performance variables are evaluated weight gain, feed intake, feed conversion, viability and productive efficiency. Carcass yield and parts (chest, legs, back, wings and abdominal fat percentage). For meat quality will be analyzed color, pH and temperature of the meat by cooking weight loss, water loss by exudation, water holding capacity, shear force and thiobarbituric acid reactive species (TBARS)in meat and blood. How antioxidade activity parameters will be evaluated total oxidant capacity(TAC) and the enzymatic activity of glutathione peroxidase (GSH) and superoxide dismutase(SOD).
News published in Agência FAPESP Newsletter about the scholarship: