上海滨岸潮滩水沉积物中无机氮的季节性变化

doi:10.11821/xb200204004

Abstract

Abstract:

In 1998-1999, contents of inorganic nitrogen (NH_4-N, NO_3-N and NO_2-N) in water and sediment of intertidal flats of the Shanghai coast were investigated at three stations (CY, DH and LY). Results show that the main form of inorganic nitrogen in water of intertidal flats is of NO_3-N with a wide range (37.2~226.1 mol^-1); most of exchangeable N in surface intertidal sediments is of NH_4-N, accounting for 70%~85%; NH_4-N and NO_3-N are the main form of inorganic N in pore water of surface sediments. Content distributions of NH_4-N, NO_3-N and NO_2-N in water and sediment of intertidal flats vary seasonally. The basic factors affecting the seasonal variation of inorganic N were discussed. Moreover, the diffusion fluxes of NH_4-N, NO_3-N and NO_2-N between water and intertidal sediment interface were estimated, indicating that NH_4-N in sediments may play an important role in the Yangtze estuarine and coastal environment.

Key words: inorganic nitrogen, distribution, water and sediment, intertidal flat

GAO Xiaojiang,ZHANG Nianli, CHEN Zhenlou,XU Shiyuan, CHEN Limin. Seasonal Variation of Inorganic Nitrogen in Water and Sediment of Intertidal Flats on the Shanghai Coast[J].Acta Geographica Sinica, 2002, 57(4): 407-412.

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Seasonal Variation of Inorganic Nitrogen in Water and Sediment of Intertidal Flats on the Shanghai Coast

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