Abstract:

Based on field investigation and laboratory analysis,hydrophytes,water nutrients of nitrogen and phosphorus,and the spatial variety of water nutrients of nitrogen and phosphorus in Jianhu wetland were analyzed,and also the impacts of hydrophytes on spatial distribution of water nutrients of nitrogen and phosphorus were discussed. The results showed that hydrophytes were rich and water nutrients of nitrogen and phosphorus presented a strong variability influenced by the wetland hydrophytes community in Jianhu wetland. Emerged plants influenced the distribution of water nutrients in the lakeshore and submerged plants in the lake and absorbed water nutrients greatly-total nitrogen （TN） and total phosphorus （TP） concentration of inflow water were 14.097 mg/L and 1.628 mg/L,but they were just 0.321 mg/L and 0.022 mg/L in outflow water in Jianhu wetland. It can be found that water quality was greatly improved,so the hydrophytes played an important role on spatial distribution of water nutrients of nitrogen and phosphorus and could make wetland ecosystem perform its own function.

Key words: Jianhu wetland, hydrophytes, nitrogen and phosphorus, spatial distribution