title: Effects of a mono-component endo-xylanase supplementation on the nutritive value of wheat-based broiler diets.
abstract: 1. Two trials were conducted to evaluate the effects of a mono-component thermostable endo-1,4-β-xylanase derived from Thermomyces lanuginosus on the nutritive value of wheat-based broiler diets. In a 5-week growth trial, the efficacy of xylanase supplementation at 0, 100, 150, 200, 400 and 4000 FXU/kg diet was evaluated. A short-term balance trial was carried out according to a 4 × 2 factorial arrangement of treatments, involving 4 wheat cultivars and endo-xylanase at 0 or 200 FXU/kg. 2. In the growth trial, enzyme supplementation from 0 to 400 FXU/kg reduced feed intake and improved feed conversion linearly. Digesta viscosity was significantly reduced by all enzyme inclusion levels by 49·6-56·9%, in a quadratic manner. 3. In the balance trial, xylanase supplementation resulted in a significant improvement of protein, lipid and dry matter apparent digestibility coefficients of diets, accompanied by improved dietary AME(N) values. There was a significant wheat × enzyme interaction on AME(N) and lipid digestibility. There was a significant effect of wheat cultivar on dry matter digestibility.
authors: IRTA, Monogastric Nutrition, Centre Mas de Bover, Ctra. Reus-El Morell Km 3.8, 43120 Constantí, Spain. maria.francesch@irta.cat
authors: M
authors: M
authors: Francesch
authors: A M
authors: AM
authors: Pérez-Vendrell
authors: J
authors: J
authors: Broz
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002480:Cellulase / Q000008:administration & dosage*; D002645:Chickens / Q000254:growth & development / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D004063:Digestion; D004305:Dose-Response Relationship, Drug; D004734:Energy Metabolism; D032641:Eurotiales / Q000737:chemistry; D008297:Male; D009753:Nutritive Value; D014908:Triticum / Q000737:chemistry
chemical_list: D002480:Cellulase