Geochemical characteristics of nitrogen in different grain size sediment from the southern Huanghai Sea

L&#220;Xiao-xia; SONG Jin-ming; YUAN hua-mao; LI Xue-gang; ZHAN Tian-rong; LI Ning; GAO Xue-lu

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LÜXiao-xia, SONG Jin-ming, YUAN hua-mao, LI Xue-gang, ZHAN Tian-rong, LI Ning, GAO Xue-lu. Geochemical characteristics of nitrogen in different grain size sediment from the southern Huanghai Sea[J]. Haiyang Xuebao, 2005, 27(1): 64-69.

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Geochemical characteristics of nitrogen in different grain size sediment from the southern Huanghai Sea

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;College of Mar-Geoscience, Ocean University of China, Qingdao 266003, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China
2.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
3.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2003-08-08
Rev Recd Date: 2003-09-26

Abstract

Abstract

The geochemical characteristics of transferable nitrogen in different grain size sediments are different.The content of SOEF-N is the highest in all transferable nitrogen.IEF-N is the predominant form in inorganic transferable nitrogen,which could take part in cycling more easily.If all the transferable forms of nitrogen could take part in cycling in suitable conditions,their relative contributions to cycling decrease according to the orderof SOEF-N,IEF-N,SAEF-N and WAEF-N.In differen grain size sedmients,the absolute contents of different trans-ferable forms of nitrogen are the highest in fine sedmients and the lowest in coarse sediments.If the proportions of each grain in sedmients are the same,the contents of transferable nitrogen in fine sediments can amount to 60% of the total transferable nitrogen,which is twoldtmies of that in medium size sedmients and amlost seven tmies of that in coarse sediments.Namely that,fine sediment has the highest potential contribution to nitrogen cycling.In addition,the relative contents of organic transferable nitrogen increase with grain size finer,while those of inorganic nitrogen decrease.
- sedmient,
- grainsize,
- nitrogen cycling,
- Huanghai Sea

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References

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