Abstract

ARAUJO, LF et al. Different criterion of feed formulation for broilers in the period 1 to 21 days of age. Rev. Bras. Cienc. Avic. [online]. 2002, vol.4, n.3, pp. 195-202. ISSN 1516-635X.  http://dx.doi.org/10.1590/S1516-635X2002000300003.

Two experiments were conducted with the objective of evaluate different criterion of feed formulation based on total and digestible amino acids for broilers from 1 to 21 days of age. The diets were formulated to attend methionine, methionine+cystine, lysine and threonine recommendations. In the first experiment, eight hundred males birds, Hubbard, were allocated in experimental design with four formulations criterions, for attempt recommendations in total amino acids - NRC (1994), Rostagno et al. (1992), Degussa (1997) e AEC (1993), with 4 replications of 50 broilers each, profiles of amino acids (methionine, methionine+cystine, lysine and threonine) for broilers. In experiment two, six hundred males birds, Cobb, were allocated in experimental design with three formulations criterions, for attempt recommendations in digestible amino acids - Rostagno et al. (2000), Baker & Han (1994) and Degussa (1997), with 4 replications of 50 broilers each, profiles of amino acids (methionine, methionine+cystine, lysine and threonine) for broilers. Weight gain, feed intake and feed conversion were evaluated. The obtained results demonstrated that there is no difference in performance of broilers fed with different criterion formulation based on total amino acids. Diets formulated with digestible amino acids, the standard established for Baker & Han (1994) resulting in best performance of broilers in the available period.

Keywords : amino acids; broilers; criterion of formulation; performance.