Anthropogenic nitrogen (N) deposition significantly affects soil microbial biomassand extracellular enzymatic activities (EE A). To date, numerous studies haveemployed single N addition (mainly in inorganic N) works in reporting influences ofN deposition on soil microbial biomass and EEA during litter decomposition in forestecosystems. As natural atmospheric N deposition is a set of complex compoundsincluding inorganic N and organic N, the research on the influences of mixed Nfertilizations on soil microbial biomass and EEA have an important scientific value,but the related reports were very few.

Graduated from Nanjing University at year 2010, currently a teacher at Hebei College of Industry and Technology.