AVALIAÇÃO NUTRICIONAL E ENERGÉTICA DA SOJA INTEGRAL DESATIVADA PARA AVES

Abstract

Chemical composition, energy values, digestibility coefficients and the values of true amino acid of eight different deactivated full-fat soybeans were determined. The total excreta collecting method was used to determine the energy values, where 180 broiler chicken, aging 21 days, were distributed in a completely randomized design, with nine treatments (eight soybeans and one reference diet), four replicates, and five birds per experimental unit. The method of “forced feeding” was used to determine the digestibility coefficients, where 40 cecectomized roosters were distributed in a completely randomized design, with eight treatments, five replicates and one rooster per experimental unit five cockerels were fasted to determine endogenous losses. The values for apparent metabolizable energy (AME), nitrogen corrected AME (AMEn), and coefficients of metab-olizability (CAME and CAMEn) for the soybean, ranged respectively, from 3.191 to 4.242 kcal/kg, 2.953 to 3.906 kcal/kg, 64.85 to 80.42% and 60.00 to 74.07%. The average values of true digestibility coefficients of essential and nonessential amino acids from soybeans evaluated ranged from 79.74 to 93.08% and from 78.33 to 91.85%, respectively. The soybean one (deactivated organic) showed the lowest digestible coefficients com-paring to the others (obtained commercially), probably due to a subprocess, confirmed by the urease activity of 0.32.