Effects on chick performance and nutrient digestibility of an endo-xylanase added to a wheat- and rye-based diet in relation to fat source

• Published in: British poultry science Vol. 38; no. 5; pp. 557 - 563
• Main Authors: Langhout, D. J., Schutte, J. B., Geerse, C., Kies, A. K., De Jong, J., Verstegen, M. W. A.
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis Group 01.12.1997
• Subjects: Animal Feed; Animal Nutrition; Animals; Chickens - physiology; Diervoeding; Dietary Fats; Dietary Fiber; Digestion - physiology; Edible Grain; Endo-1,4-beta Xylanases; Energy Intake; Energy Metabolism; Food, Fortified; Leerstoelgroep Diervoeding; Male; Triticum; Weight Gain; WIAS; Xylosidases - administration & dosage; Xylosidases - pharmacology
• ISSN: 0007-1668; 1466-1799
• DOI: 10.1080/00071669708418036

1. A study with growing chicks investigated the effects of an inclusion of an endo-xylanase preparation (LYXASAN®) to a wheat- and rye-based diet on performance and nutrient digestibility in relation to the fat source. 2. The basal diet contained 500 g wheat and 100 g rye/kg of diet. The basal diet was supplemented with either 65 g soya oil/kg or 60 g blended animal fat and 5 g soya oil/kg. 3. Endo-xylanase added to the soya oil diet did not affect weight gain, but there was a numerical improvement in food conversion efficiency which was not statistically significant. When the endo-xylanase preparation was added to the blended animal fat diet, both weight gain and food utilisation were improved by 9.5% and 6.0%, respectively (P< 0.05). 4. Digestibilities of organic matter, crude fat, crude fibre and NFE were not significantly affected by adding endo-xylanase to the soya oil diet. However, when endo-xylanase was included in the blended animal fat diet, digestibility of organic matter, crude fat, crude fibre and NFE were improved (P<0-05). The improvement in fat digestibility was the most pronounced, amounting to 9-4%. Nitrogen retention and metabolisable energy content were improved significantly by the addition of an endo-xylanase to the animal fat diet (P< 0.05), by 6.6% and 6.5% respectively. 5. From the results of this study, it can be concluded that the effects on chick performance and nutrient digestibility of a dietary endo-xylanase in a wheat- and rye-based diet are influenced to a considerable degree by the type of fat in the diet.