RESUMO.Foram conduzidos dois experimentos com o objetivo de avaliar os efeitos da suplementação enzimática das rações à base de milho e farelo de soja sobre o desempenho e metabolizabilidade dos nutrientes em codornas de corte. Os tratamentos foram: controle positivo para atendimento das exigências; controle positivo suplementado com complexo enzimático e controles negativos suplementados reduzidos em 2 e 4% nos teores de energia metabolizável e aminoácidos. Na fase inicial, observou-se aumento no consumo de ração (p < 0,05) no tratamento controle negativo reduzido em 4% na energia metabolizável e aminoácidos em comparação aos tratamentos controle positivos. Na fase de crescimento o consumo de ração, conversão alimentar e rendimento de carcaça não diferiram (p > 0,05). Conclui-se que o complexo enzimático pode ser utilizado em dietas reduzidas em energia metabolizável e aminoácidos sem prejudicar o desempenho de codornas de corte. No ensaio de metabolismo, não foram observadas diferenças (p > 0,05) entre os tratamentos para os coeficientes de metabolização das matérias seca e orgânica, proteína bruta e energia bruta. O coeficiente de metabolização da FDN melhorou (p < 0,05) com a adição de enzimas.Palavras-chave: balanço de nutrientes, carboidrases, Coturnix coturnix sp., desempenho, enzimas, rendimento de carcaça.ABSTRACT. Enzymatic complex utilization in meat type quail feed. Two experiments were carried out to evaluate the effects of enzyme supplementation (xylanase + β-glucanase) of diets based on corn and soybean meal on: performance in initial (1-14 days) and growing (15-35 days) phases, and nutrient metabolization of meat-type quails. The treatments were: positive control to meet the nutritional requirements of the specie; positive control supplemented with enzyme complex; and negative controls with two reduced supplementation levels of metabolizable energy and amino acids (by 2% and 4%). In the initial phase, the negative control treatment reduced by 4% of metabolizable energy and amino acids increased feed intake (p < 0.05), compared to positive controls. In the growing phase, there were no differences (p > 0.05) in feed intake, feed conversion ratio and carcass traits. In conclusion, this supplementation can be used successfully in diets with reduced metabolizable energy and amino acid contents for meat-type quails. In the metabolism trial, there were no differences (p > 0.05) in metabolizable coefficients of dry matter, organic matter, crude protein and gross energy among treatments. The metabolization coefficient of NDF improved (p < 0.05) with enzyme supplementation.
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