The present invention relates to an enzymatic composition comprising a main substrate, selected from the group consisting of wheat, wheat bran, rapeseed cake and a mixture thereof, fermented with a strain of Aspergillus section Nigri, said enzymatic composition having: (i) a xylanase activity greater than or equal to 500 AXC per gram of composition, (ii) a β-glucanase activity of greater than or equal to 500 BGU per gram of composition, and (iii) a cellulase activity greater than or equal to 50 CMC per gram of composition； as well as to its use in the feed of ruminants.
