The Study of Denitrification Rate and N2O Release Rate in Shuangtaizi Estuary Wetland

The denitrification and its influencing factors were studied in reed, suaeda heteroptera and reed degraded wetland. PDR were similar in reed and suaeda heteroptera wetland; primary influencing factors were temperature, nitrate and TOC. pN2O, N2O/ (N2O + N2) were less in reed wetland than that in suaeda heteroptera wetland; significant influencing factor was ORP. Compared with the reed wetland, the PDR in reed degraded wetland had significantly reduced, whose limiting factor was TOC concentration in soil; the ration of N2O/ (N2O + N2) had increased and the pN2O had no obvious change in reed degraded wetland.