Composição bromatológica de ovos de peso constante e crescentes de matrizes pesadas ao longo de suas vidas reprodutivas

Abstract

The objective of this study was to verify the influence of the age of broiler breeders on the bromatological composition of the albumen and the yolk of embryonated eggs. Two previously defined treatments were used for the weight range of Cobb weighing eggs at 31, 40, 48 and 58 weeks of age. They are: eggs of constant weight and eggs of increasing weights, both obtained along the age of the broiler breeders. The eggs of constant weight were between 63.6 g and 64 g. On the other hand, eggs of increasing weights presented weights of 60.0g from broiler breeders with 31 weeks of life; 64.2g of 40 weeks; 66.6g of 48 weeks and 69.9g of 58 weeks of age, these weights may have undergone variation of +/- 0.5g. The analysis of the physical and bromatological composition consisted of dry matter, mineral matter, crude protein and ethereal extract. Statistical analysis of the Shapiro Wilk normality tests and homogeneity of the Levene variances, (P <0.01) test F by analysis of variance and Tukey regression or test, (P <0.05). The dry matter content and concentrations of crude protein, ethereal extract and mineral matter of albumin and egg yolk of Cobb 500 broiler breeders remained constant throughout the productive cycle and were not influenced by the age of the bird or the size of the egg.