Abstract: Different plant species in Liangzi Lake wetland had different accumulation features of nitrogen and phosphorous. Floating-leaved macrophyte accumulated the largest amount of nutrients, with an average content of total nitrogen and phosphorus being 29.07 and 9.53 g·kg^-1, respectively. The plant nitrogen and phosphorus contents were in the order of phytoplankton>floating-leaved macrophyte>submersed macrophyte>rice>emerged macrophyte. The nitrogen and phosphorus accumulation in plant was in the order of floating-leaved macrophyte>emerged macrophyte>submersed macrophyte>swamp plant>rice. Hydrophyte could absorb more nitrogen and phosphorus, and the nitrogen absorption by various kinds of plant in the wetland was greater than that of phosphorus absorption.

Key words: Intensive cropping systems, Nitrogen budget, Nitrate accumulation in soil, Groundwater, Nitrate contamination