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

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Author: Langhout, D.J. · Schutte, J.B. · Geerse, C. · Kies, A.K. · Jong, J. de · Verstegen, M.W.A.
Type:article
Date:1997
Institution: Centraal Instituut voor Voedingsonderzoek TNO
Source:British Poultry Science, 5, 38, 557-563
Identifier: 234151
Keywords: Nutrition · Endo 1,4 beta xylanase · Xylan 1,4 beta xylosidase · Animal · Animal food · Caloric intake · Cereal · Chicken · Comparative study · Diet supplementation · Dietary fiber · Digestion · Energy metabolism · Fat intake · Male · Physiology · Weight gain · Wheat · Animal Feed · Animals · Cereals · Chickens · Dietary Fats · Dietary Fiber · Digestion · Endo-1,4-beta Xylanases · Energy Intake · Energy Metabolism · Food, Fortified · Male · Triticum · Weight Gain · Xylosidases

Abstract

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.