Suplementação de metionina e cálcio em dietas reformuladas para poedeiras Embrapa 051

Abstract

This study aimed to evaluate the effects of supplementation with methionine and calcium in high crude protein (CP) diets on the productive characteristics and egg quality of Embrapa hybrid layers (E051). A total of 860 layers were used, divided into four treatments: T1 (control diet 15% CP), T2 (15% CP + Calcium), T3 (19% CP + Methionine), and T4 (19% CP + Calcium and Methionine). The experiment covered the period from 20 to 65 weeks of age of the birds. Supplementation of methionine in conjunction with calcium in 19% CP diets significantly increased the egg production rate, reaching its peak in the 30th week. It achieved higher production rates compared to the control group or birds supplemented with calcium in 15% CP diets. Furthermore, egg weight was significantly higher in weeks 36 and 65 in birds receiving 19% CP and supplemented with the combination of methionine and calcium. The body weight of the birds at the end of the experimental period (65 weeks of age) was positively influenced compared to the control group. Mortality rates were not affected by calcium and methionine supplementation and diet reformulation. Supplementation influenced laying behavior, with birds receiving only methionine or the combination of methionine and calcium showing a reduced tendency to lay eggs on the ground. However, it was observed that combined supplementation of methionine and calcium in 19% CP diets increased the occurrence of eggs with deformities and double yolks. In summary, the results of this study indicate that supplementation of Embrapa 051 layers with the combination of methionine and calcium in 19% CP diets can improve the laying rate, egg weight, and body weight of birds at the end of the laying cycle without significantly affecting mortality. On the other hand, joint supplementation of methionine and calcium in 19% CP diets may result in a higher proportion of eggs with double yolks and deformities. However, according to the results presented, from the perspective of the poultry industry, the benefits of calcium and methionine supplementation in 19% CP diets are more significant and important than the observed drawbacks.