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  • 1 Department of Animal Hygiene, Herd Health and Veterinary Ethology, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 2 Department of Plant Anatomy, Eötvös Lóránd University Budapest, Hungary
  • 3 Research Institute for Animal Breeding and Nutrition Herceghalom, Hungary
  • 4 Department of Biomathematics and Informatics, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 5 Department of Animal Hygiene, Herd Health and Veterinary Ethology, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 6 Department of Animal Hygiene, Herd Health and Veterinary Ethology, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 7 Department of Animal Hygiene, Herd Health and Veterinary Ethology, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
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A study was conducted to obtain data on the effects of a fungal fibrolytic enzyme preparation (Rumino-zyme, with 250 FXU/g xylanase activities) from Thermomyces lanuginosus on some rumen fermentation parameters in sheep. Ruminal fluid samples were taken just before the morning feeding and then 2 h and 4 h after feeding. Xylanase activity, pH, concentration of ammonia and volatile fatty acids were measured. The enzyme supplementation did not affect the pH but increased the xylanase activity and the total VFA concentration of the rumen fluid. The molar proportion of acetate increased, propionate was not affected and butyrate decreased after enzyme administration. The concentration of ammonia also decreased after supplementation with the enzyme product. It can be concluded that the xylanase enzyme preparation from T. lanuginosus induced favourable changes in the major rumen fermentation parameters in sheep.

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