In order to study the effect of atmospheric nitrogen deposition on the release of carbon from the forest soil,an experiment was done in Heshan Hilly Interdisciplinary Stand.The release rate of CO_2 from 3 forests soils(Pinus eliotii,Schima superba and Acacia mangium)mensured using acid-base titration.The results showed that atmospheric nitrogen deposition depressed the release rate of CO_2 from Pinus eliotii forest soil.Moreover,this effect became stronger with the concentration of nitrogen treatment increa...