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dc.contributor.author王益鸣
dc.contributor.author吴烨飞
dc.contributor.author王键
dc.contributor.author郑爱榕
dc.date.accessioned2016-05-17T02:52:31Z
dc.date.available2016-05-17T02:52:31Z
dc.date.issued2011
dc.identifier.citation海洋学研究,2011,(3):198-205
dc.identifier.issn1001-909X
dc.identifier.otherDHHY201103024
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/106599
dc.description.abstract研究分析了长江口柱状沉积物中氮的赋存形态,并结合沉积速率和有机碳含量分析了氮的迁移转化特征和有机质来源。研究结果表明,有机物与硫化物结合态氮(OSf-n)是柱状样可转化形态氮中的主要赋存形态,碳酸盐结合态氮(Cf-n)含量最低;位于长江口122°E附近测点的各形态氮的垂直分布与122.6°E附近测点的差异明显,受水动力条件和沉积速率等因素影响,122.6°E附近测点的有机氮降解速率常数和各形态氮的埋藏通量均高于122°E附近测点;长江口柱状沉积物中有机氮降解主要发生在沉积物表层和次表层;OC/Tn值的垂直分布变化幅度较大,陆源输入均大于70%。
dc.description.abstractTotal nitrogen and its forms in the core sediments from Changjiang River Estuary were studied with sequential extraction method.And combined with the deposition rate and the organic carbon content,the characteristics of its migration and transformation and the sources of organic carbon were also studied.The results show that OSF-N is the main form of transferable nitrogen,and CF-N content is the lowest of the transferable nitrogen in the core sediments.There are evident differences in the vertical distribution of different nitrogen forms in the core sediments of SH3111 station(at 31°N,122°E) from that in SH3110 station(31°N,122.6°E).Affected by the hydrodynamics and the deposition rate,the values of the degradation rate constant of the organic nitrogen and the burial flux of different forms of nitrogen at the SH3110 station are higher than those at the SH3111 station.Degradation of the organic nitrogen occurred mainly in the surface and sub-surface layers of the sediment and the vertical distribution of the OC/TN ratios varies greatly,showing different depositional conditions.The proportions of terrigenous carbon are higher than 70%.
dc.description.sponsorship环保公益性行业科研专项资助项目(2008467041);浙江省环保厅科研专项资助项目(2008-30)
dc.language.isozh_CN
dc.subject氮形态
dc.subject地球化学特征
dc.subject柱状沉积物
dc.subject长江口
dc.subjectnitrogen form
dc.subjectgeochemical characteristic
dc.subjectcore sediment
dc.subjectChangjiang River Estuary
dc.title长江口柱状沉积物中氮的形态特征研究
dc.title.alternativeGeochemical characteristics of nitrogen in the core sediments from Changjiang River Estuary
dc.typeArticle


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