Distribution of Water Soluble Organic Nitrogen(WSON)in Acidic Forest Soils,Southwestern China

摘要

Atmospheric nitrogen deposition has been a world wide environmental problem.Accelerated N deposition could significantly alter internal soil N cycling and lead to nitrogen leaching(1).Water soluble organic nitrogen(WSON)was an important nitrogen fraction leached from forest soils(2).Though its percentage in total dissolve nitrogen(TDN)decreased with N deposition,the leaching flux of WSON seemed increase with nitrogen deposition in forest areas(2,3).So far little is known on the geochemical processes of WSON in soils,because most focuses were put on the dynamics of inorganic nitrogen compounds in the previous studies.