Fornecimento de treonina e glutamina in ovo sobre o desempenho de frangos de corte na fase inicial

Abstract

The objective was to evaluate the effect of embryonic supplementation with threonine and glutamine in ovo on the performance characteristics of broiler chickens in the initial phase. We used 450 eggs obtained from a commercial hatchery, from 33-week-old CobbMale breeders, distributed in three treatments, corresponding to three solutions supplemented in ovo (S1 = saline solution; S2 = 3.5% threonine solution; S3 = 3.5% glutamine solution). After hatching, the chicks were distributed in a completely randomized experimental design, with four replications of 10 animals each. The performance characteristics of feed intake, weight gain and feed conversion were evaluated. At seven days of age, treatments supplemented with saline solution (control) and glutamine solution showed greater weight gain. For the feed conversion variable, worse values were observed for the control and glutamine treatments, and better conversion for in ovo threonine supplementation. At 14 days of age, feed intake and body weight showed no difference. Supplementation with saline solution provided better weight gain and worse feed conversion at 14 days. At 21 days there was no difference for the feed intake and weight gain parameters, the conversion was lower for the treatment supplemented with glutamine and similar between the control and threonine treatments. Based on the results obtained, it is possible to conclude that the use of amino acids in ovo supplementation did not influence the performance of broiler chickens in the initial phase.