Dietary xylanase increases hepatic vitamin E concentration of chickens fed wheat based diet
V. Pirgozliev 1  
,   F. Karadas 2,   S. P. Rose 1,   A. Beccaccia 1, 3,   M. W. Mirza 1,   A. M. Amerah 4
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Harper Adams University, National Institute of Poultry Husbandry, Shropshire, TF10 8NB, United Kingdom
Yuzuncu Yil University, Department of Animal Science, Turkey
University of São Paulo, College of Veterinary Medicine and Zoothechnics, 05640-003, Brazil
Danisco Animal Nutrition, Wiltshire, SN8 1XN, United Kingdom
V. Pirgozliev   

Harper Adams University, National Institute of Poultry Husbandry, Shropshire, TF10 8NB, United Kingdom
Publication date: 2015-03-15
J. Anim. Feed Sci. 2015;24(1):80–84
The study examined the effect of xylanase supplementation on apparent metabolizable energy (AME) and hepatic vitamin E and carotenoids in broiler chickens fed wheat based diets. A total of one hundred forty four male Ross 308 chickens were used in this study. Birds were randomly assigned to 3 dietary treatments (8 cages per treatment of 6 male broilers each) for 14 days from 7 to 21 day old. The control treatment was based on wheat-soyabean meal and was either unsupplemented or supplemented with either 1000 or 2000 xylanase units per kg diet. Orthogonal polynomial contrasts were used to test linear response to dietary xylanase activity. There was a positive linear relationship (P < 0.05) between dietary AME and doses of supplementary xylanase. A linear relationship (P < 0.05) was also observed between dosage of xylanase supplementation and hepatic vitamin E concentration and retention. In conclusion, xylanase supplementation improved dietary AME and increased hepatic vitamin E concentration which may have positive effects on the antioxidative status of the birds.
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