Supplementation of Xylanase Levels in Lower Energy Diets on Digesta Viscosity, Blood Metabolites and Gut Health of Broiler.

Current study was planned to evaluate supplementation of two different xylanase levels on digesta viscosity, blood metabolites and intestinal morphology of broiler chickens fed low energy wheat-based diet. A total of 480-day old broiler chicks were used in the current study with 8 replicates per treatment, and each replicate had ten birds. Six iso-caloric and iso-nitrogenous diets were prepared according to strain recommendations. Wheat was used in all dietary treatments except control treatment in which corn-soybean was used. Experimental diets were formulated as, 1) =control, corn-soybean based diet 2) = wheat-based diet, 100% wheat, no corn, 3) = 100% wheats, ME lowered 75 Kcal with 1000XU/kg of feed, 4) = 100% wheats, ME lowered 75 Kcal with 1500XU/kg of feed, 5) = 100% wheats, ME lowered 150 Kcal with 1000XU/kg of feed, 6) = 100% wheats, ME lowered 150 Kcal with 1500XU/kg of feed. Less viscosity, cholesterol and urea nitrogen noted in birds fed control diet and 100% wheat-based diet without xylanase supplementation (P<0.05). Low blood glucose was observed in diets without supplementation of xylanase and without reduced energy levels (P<0.05). Better villus height, villus width and villus surface area were in birds fed control diet and wheat-based diet with no lowered energy level and without xylanase supplementation (P>0.05). Based on the findings of current study, the inclusion of xylanase in diets with 75 Kcal lowered energy perform better than diets with 150 Kcal lowered energy. [ABSTRACT FROM AUTHOR]