Enzyme feed additive and animal feed
AssigneesGenecor International, Inc., Finnfeeds International Ltd.
InventorsMichael R. Bedford, Andrew J. Morgan, Kathleen Clarkson, Hagen K. Schulze
Life of this patent
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Abstract
An enzyme feed additive is provided comprising a xylanase, a protease, and optionally a .beta.-glucanase. The ratio of the units of xylanase activity per unit amount of the feed additive to the units of .beta.-glucanase activity per same unit amount of the feed additive is 1:0-0.25. Preferably, the xylanase is the low pI xylanase and/or the high pI xylanase obtained from Trichoderma longibrachiatum. Preferably, the protease is a mutant subtilisin comprising a substitution at the amino acid residue position equivalent to tyr+217 of Bacillus amyloliquefaciens subtilisin with leucine.
Claims28
An enzyme feed additive comprising:
- (i) a xylanase;
- (ii) a protease;
- and optionally
- (iii) a .beta.-glucanase
- wherein the ratio of the units of xylanase activity per g of the feed additive to the units of the .beta.-glucanase activity per g of the feed additive is 1:0-0.25.
A method for improving the feed conversion ratio and/or increasing the digestibility of a cereal-based feed comprising adding to said cereal-based feed an enzyme feed additive comprising:
- (i) a xylanase;
- (ii) a protease;
- and optionally
- (iii) a .beta.-glucanase
- wherein the ratio of the units of xylanase activity per g of the feed additive to the units of the .beta.-glucanase activity per g of the feed additive is 1:0-0.25.
A cereal-based feed comprising (i) at least 25% by weight of wheat and/or maize;
- (ii) a xylanase in such an amount that the feed includes 100-100,000 units of xylanase activity per kg.;
- (iii) a protease in such an amount that the feed includes 100-100,000 units of protease activity per kg.;
- and optionally (iv) a .beta.-glucanase;
- wherein the ratio of the units of xylanase activity per kg. of the feed to the units of .beta.-glucanase activity per kg. of feed is 1:0-0.25.
A cereal-based feed comprising at least 25% by weight of wheat and/or maize and 100-100,000 units per kg. of a mutant subtilisin comprising a substitution at the amino acid residue position equivalent to tyr+217 of the subtilisin obtainable from Bacillus amyloliquefaciens with leucine.
A cereal-based feed comprising (i) at least 25% by weight of wheat and/or maize;
- and (ii) the high pl xylanase and/or the low pl xylanase obtainable from Trichoderma longibrachiatum in such an amount that the feed includes 100-100,000 units of xylanase activity per kg.
A method for preparing animal feed comprising a cereal-based feed and a composition including the low pl xylanase and/or the high pl xylanase obtainable from Trichoderma longibrachiatum and optionally a .beta.-glucanase as a feed additive, characterized in that the ratio of the units of xylanase activity per g of the composition to the units of .beta.-glucanase activity per g of the composition is 1:0-0.25.
Dependencies are inferred from the claim text.