Background: There is less information in Nigeria with regard the understanding of the use of exogenous enzymes widely used in monogastric diets in ruminant’s rations. The study evaluated the effects of supplementing xylanase and glucanase in combination in rations of Yankasa rams. Sixteen yearling Yankasa rams (average 21 kg) were used. Four treatments were evaluated: control (without enzyme combination), 50:50, 75:25 and 25:75 xylanase-glucanase combinations denoted as T1, T2, T3, and T4 respectively. The basal roughage was cowpea husk and sorghum husk. The feeding trial was conducted using complete randomize design.Results: There were differences (p<0.05) with regard to nutrient intake and total digestibility coefficient except crude protein and nitrogen free extract digestibility (p>0.05). The intake and digestibility increased with supplementation of xylanase and glucanase combination at 25:75 ratio respectively. It increased DM intake by 211.90 g/d, DM digestibility by 17.73%, ADF digestibility by 1.17% and NDF digestibility by 1.02%. The nitrogen balance in the body did not increase (p>0.05) with supplementation of 50:50 xylanase-glucanase combination. The efficiency of nitrogen utilization did not differ between the control and 50:50 xylanase-glucanase combination. Conclusion: The combination of xylanase and glucanase at ratio 25:75 respectively improved nutrient intake and digestibility but did not influence nitrogen utilization.
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