Aspergillus niger J506 was cultivated in both normal fermentation medium and medium feeding ammonia water,from which xylanase,protease and pH were measured.

• 用正常产酶培养基和流加氨水产酶培养基培养Aspergillus niger J506,测定木聚糖酶的活性、酸性蛋白酶的活性和pH值。