Effects of a mono-component endo-xylanase supplementation on the nutritive value of wheat-based broiler diets.
Br Poult Sci
; 53(6): 809-16, 2012.
Article
em En
| MEDLINE
| ID: mdl-23398426
ABSTRACT
1. Two trials were conducted to evaluate the effects of a mono-component thermostable endo-1,4-ß-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.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Celulase
/
Galinhas
/
Digestão
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Metabolismo Energético
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Valor Nutritivo
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article