Coeficiente de digestibilidade da proteína bruta e taxa de passagem de dietas vegetais para frangos de corte com variação na composição química e presença de enzimas exógenas

A portion of the dietary nutrients is excreted due to the presence of antinutritional factors in some ingredients. This study aimed to determine the total and ileal digestibility coefficients of crude protein, as well as the passage rate of diets with different chemical compositions, supplemented or not with an enzymatic complex, in broiler chickens. No effect of the enzymatic complex was observed on the crude protein digestibility coefficient (P>0.05). However, the ileal digestibility coefficients of crude protein showed significant differences (P0.05). It was concluded that the inclusion of the enzymatic complex, composed of calcium carbonate, Yucca extract, protease, phytase, and cellulase, in vegetable-based diets for broiler chickens did not affect digestibility coefficients or passage rate. Keywords: poultry farming, enzyme additives, nutrition, crude protein