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从土壤中筛选到两株可分解半纤维素的霉菌，经鉴定分别为毛霉和黑曲霉。采用ＤＮＳ—还原糖法对其所产的胞外木聚糖酶进行了活性测定，毛霉的木聚糖酶活性为７４．７ＩＵ／ｍｌ，黑曲霉的木聚糖酶活性为９２．６ＩＵ／ｍｌ。
Two strains of moldable hemicelluloses were screened from the soil and identified as Mucor and Aspergillus niger respectively. The activity of xylanase produced by it was determined by DNS-reducing sugar method. The activity of xylanase of Mucor was 74.7 IU / ml, the activity of xylanase of Aspergillus niger was 92.6 IU / ml.