Distribution Characteristics and Environmental Effect of Wetland Soil Nutrients in Chongming Dongtan

Based on the analysis of different types and inter-tidal of wetlands about organic matter,TN,TP content and distribution in Chongming Dongtan,environmental effects of different coastal wetlands soil as nutrients meeting and carbon deposition were assessed.Results showed that organic matter,TN and TP on average of Phragmites communis-sandy wetlands soil were 1.36%,0.1% and 0.03%,while the mixed wetlands soil of Phragmites communis-sandy wetlands soil were 2.41%,0.27% and 0.07%.With the increase in elevation from low ebb to upsurge beach,organic matter and TN in the Phragmites communis-sandy wetlands soil and the mixed wetlands soil of Phragmites communis/Spartina alterniflora was in a smooth rise while TP change was not significant,which showed that the mixed wetlands soil of Phragmites communis/Spartina alterniflora has better clustering effect about N and P nutrients caused of eutrophication of coastal waters as well as the carbon emissions caused of global climate change,and the upsurge beach has better clustering function than the low ebb.