Soil samples at different depths were collected from island forest

Calamagrostis angusti f olia meadow and Carex Lasiocarpa marsh in a typical annular wetland of the Sanjiang Plain.Horizontal and vertical distributions and DOC(dissolved organic carbon) storage in the wetland were studied and the DOC distribution affected by the specific hydrology and landform conditions of typical annular wetland was analyzed.Results showed that the DOC content decreased with the increased soil depth.From high to low

the DOC contents in soil profiles showed the order of Carex Lasiocarpa marsh

Calamagrostis angustifolia meadow and island forest

and the DOC storage

Calamagrostis angustifolia meadow

island forest and Carex Lasiocarpa marsh.respondingly.In the 0-60 cm soil layers

the DOC storages were 0.1113

0.0844 and 0.0588 t/hm2

correspundingly.