Suplementação dietética de vitamina E para matrizes pesadas

Abstract

An experiment was conducted in order to evaluate the influence of two vitamin E levels, 40 and 150 ppm, in broiler breeders diets with advanced age on fertility, hatching yield, quality and nutrients from fertile eggs, concentration of vitamin E tissues of the progeny, development of newly hatched chick and indicators of oxidative stress. The eggs used at this experiment, were achieved from Cobb® broiler breeders with similar fertility and hatchability. Four warehouses composed the poultry houses, with 9250 females and 925 male birds. Each warehouse was divided into two sides, with equally distribution of the birds, constituting one replicate. Thus, there were eight replicates, with 4625 female and 462 male birds. The experimental period lasted eight weeks, when the broiler breeders age was 54 to 59 weeks. The eggs for incubation (2304 per treatment) were collected in the 59th week of age. The experimental design was completely randomized. Fertility, incubation yield, indicators of oxidative stress and egg quality were not affected by treatments. The concentration of vitamin E in egg yolk was higher for the group supplemented with 150 ppm and vitamin A concentration was lower for this treatment, indicating an antagonism between them. The chicks from the higher level of vitamin E were heavier. The concentrations of alpha tocopherol in yolk sac and liver were higher for treatment with the highest level of supplementation of vitamin E.