In this study the main form of the nitrogen that diffused from sediment into overly water was ammonia , and the submerged plant decreased the diffusion fluxes of ammonia and nitrate at water - sediment interface 總之,水沉積物界面氨氮是沉積物向上覆水擴散的主要氮組分,沉水植物降低了氨氮和硝態氮的擴散通量。