%0 Journal Article
%T Inorganic Nitrogen Fluxes at the Sediment-water Interface in Tidal Flats of the Yangtze Estuary<br>长江口潮滩沉积物－水界面无机氮交换通量
%A CHEN Zhenlou
%A WANG Dongqi
%A XU Shiyuan
%A ZHANG Xingzheng
%A LIU Jie
%A <br>陈振楼
%A 王东启
%A 许世远
%A 张兴正
%A 刘杰
%J 地理学报
%D 2005
%I 
%X Inorganic nitrogen fluxes at the sediment-water interface of seven typical sites in tidal flats of the Yangtze estuary had been determined seasonally during more than three years. The results revealed that the sediment-water exchanges of inorganic nitrogen appeared to be of complicated spatial differences and seasonal variations. The measured fluxes of NO-3-N and NH+4-N in the Yangtze estuary were higher than those in other estuaries, varying respectively from -32.82 to 24.13 mmol·m-2·d-1 and from -18.45 to 10.65 mmol·m-2·d-1. However, the fluxes of NO-2/sub>-N were very low, and only varied from -1.15 to 2.82 mmol·m-2·d-1. The spatial and seasonal differences between the upper and lower estuary for the NO-3-N fluxes were observed clearly, but the NH+4-N fluxes exhibited the spatial and seasonal differences between the south and north bank. It had been recognized that the NH+4-N exchange behavior was mainly controlled by the salinity, whereas the NO-3-N exchange behavior was influenced by the different combinations of the sediment grain size, nitrate concentration in overlying water, sediment organic matter content, water temperature and dissolved oxygen concentration.
%K inorganic nitrogen
%K exchange flux
%K sediment-water interface
%K tidal flat
%K Yangtze estuary<br>无机氮
%K 交换通量
%K 沉积物-水界面
%K 潮滩
%K 长江口
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=C1F6F9BFE9EAC8E3&yid=2DD7160C83D0ACED&vid=BFE7933E5EEA150D&iid=0B39A22176CE99FB&sid=A5B34D9E8FDA439A&eid=50EA2A80A7D254EF&journal_id=0375-5444&journal_name=地理学报&referenced_num=9&reference_num=39