Idade da matriz e tempo de estocagem dos ovos no desenvolvimento de frangos de corte

Abstract

The artificial incubation has an important role in poultry production, before that, the objective of this study was to evaluate the effect of breeder age and egg storage time on the characteristics of incubation and embryonic development. We used a completely randomized 3x3 factorial arrangement with three broiler breeder ages (33, 43 and 61 weeks) and three-term storage of eggs (24, 72 and 120 hours). We incubated 900 eggs from a single commercial line of broiler breeders of broilers. Evaluations were performed at 11, 13, 15, 17 and 18 days of incubation, five eggs were used for each treatment, weighed and evaluated the egg, the yolk and embryo, as well as the size of the embryo was also measured. After the birth of the chicks, unhatched eggs were opened and evaluated mortality, according to the stage, early mortality (1-7 days), intermediate (8-18 days) and late (19 to 21 days). There was no interaction (p> 0.05) between the age of the matrix and storage time of eggs on the parameters evaluated in any of the evaluated days of incubation. On all days of incubation was no effect of age of the array to the characteristics of the egg and yolk weight, and the matrices aged 61 weeks were observed greater weight, the age of 43 weeks intermediate weight matrix of 33 weeks and weight less than. In relation to embryonic mortality of unhatched eggs, there was no interaction between factors. Therefore, older arrays produce heavier eggs and higher percentages of yolk, which however does not affect embryonic development.