Fontes Alternativas de Metionina na Dieta Sobre o Desempenho de Codornas Japonesas em Postura.

Abstract

The experiment was conducted at the Poultry Sector of the Agricultural Sciences Campus of the Federal University of Paraíba, located in the city of Areia-PB, in order to determine the availability of alternative sources of methionine (Methionine hirdoxianáloga powder - HMTBA.P and liquid - HMTBA.L) compared to the standard source (DL - Methionine - DLM) in the diet of Japanese laying quails, and to verify if the use of analogue methionine source (HMTBA.L - 88% vs HMTBA.P - 84%) in liquid or powder form does not alter quail performance. A total of 1,200 female Japanese quails (egg production) were purchased at one day of age. On completion of 40 days, the birds were housed in galvanized wire cages (100x30x20 cm), arranged in four stages, arranged in a ladder scheme. Ten treatments were used with 10 replicates with 10 birds per experimental unit (1,000 birds). The treatments were distributed in the respective experimental units according to the design in a completely randomized design. It was observed that the methionine sources used in the diets (DLM, HMTBA.L and HMTBA.P) influenced the performance of quails. By, analyzing orthogonal contrasts, it can be observed that DLM diets provided better quails performance, however, it was not possible to verify a significant effect when comparing the diets containing the HMTBA.L and HMTBA.P sources for the following variables: feed intake; egg weight; and egg mass. The other variables (egg production, conversion by egg mass and dozen eggs) were influenced by the methionine sources present in the diets, that is, diets with the HMTBA.L source provided better quail performance. The availability of the methionine sources were respectively: 100% DLM, 81% HMTBA.L and 79% HMTBA.P.