Influence of non-starch polysaccharide-degrading enzymes on growth performance, blood parameters, and carcass quality of broilers fed corn or wheat/barley-based diets

Background: Although the use of non-starch polysaccharide-degrading enzymes (NSPases) in corn, oat, rye, barley or wheat-based broiler diets has already been researched for some years, little attention has been given to the mixture of wheat and barley, as basic raw materials for broiler feed. Objective: To evaluate the effect of different inclusion levels of commercial NSP enzymes in corn or in the mixture of wheat/barley-based diets on growth performance, carcass quality and blood parameters of broilers. Methods: Three hundred 1 d-old male broiler chicks (Ross-308) were fed two basal diets (corn and a wheat/barley-based diets), two commercial feed enzymes (Kemin® and Rovabio®), and two enzyme levels (0.025 and 0.05%) in a 2×2×2 factorial arrangement, from 1 to 42 d of age. Results: Overall, birds fed corn-based diets with or without enzyme supplementation consumed more feed (p0.05) by the treatments, while blood biochemistry parameters, such as glucose, VLDL and HDL changed (p0,05), enquanto os parâmetros bioquímicos do sangue, como glicose, colesterol, VLDL e HDL, mudaram (p0.05) las características económicas de la canal, mientras que parámetros de bioquímica sanguínea como glucosa, colesterol, VLDL y HDL cambiaron (p