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对长江口南翼上海滨岸带三个站点潮滩上覆水、沉积物和间隙水中的三态无机氮的含量分布的年度季节性监测研究表明:潮滩上覆水中溶解无机氮以NO3 N为主;表层沉积物中可交换态无机氮以NH4 N为主,约占70%～85%;沉积物间隙水中主要无机氮为NH4 N和NO3 N.在冬季潮滩上覆水中硝态氮含量明显降低,而沉积物和间隙水中氨氮和硝态氮的浓度则有较大增加.初步探讨了潮滩水和沉积物中无机氮分布季节性变化的主要影响因素,估算了潮滩表层沉积物 水界面无机氮的扩散通量,指出NH4 N的扩散释放对滨岸水环境质量影响较大.
The annual seasonal monitoring of the content distribution of the three-phase inorganic nitrogen in tidal flat overlying water, sediment and interstitial water at the three stations in the south coast of the Yangtze River estuary shows that the dissolved inorganic nitrogen in tidal flat overlying water uses NO3 N as The main exchangeable inorganic nitrogen in the surface sediments is mainly NH4N, accounting for 70% -85%. The main inorganic nitrogen in the interstitial water is NH4N and NO3 N. In the winter tidal flat, the nitrate nitrogen content , While the concentrations of ammonia nitrogen and nitrate nitrogen in sediment and interstitial water increased greatly.The main influencing factors of the seasonal variation of inorganic nitrogen in tidal flat and sediment were discussed, Water interface of inorganic nitrogen diffusion flux, pointed out that the diffusion of NH4N release on the water quality of the greater impact on the shore.