Also,the results indicated that soil microbial biomass nitrogen could be increased with the application of urea and organic materials,and the enhanced results among 3 treatments was:U+S>U+M>U.

• 矿质氮营养和能源碳的加入均可增加土壤中微生物态氮的含量，培养8周时土壤中微生物态氮含量以：尿素+麦秸>尿素+鸡粪>尿素单施处理。