%0 Journal Article
%T Nitrogen forms and their distribution characteristics in the soils of water-level-fluctuationg zone in the central Three Gorges Reservoir<br>三峡库区淹没消落区土壤氮素形态及分布特征
%A ZHANG Bin
%A CHEN Youpeng
%A FANG Fang
%A LI Zhe
%A GUO Jinsong
%A WANG Zheng
%A <br>张彬
%A 陈猷鹏
%A 方芳
%A 李哲
%A 郭劲松
%A 王征
%J 环境科学学报
%D 2012
%I 
%X The contents of various nitrogen forms in the soils sampled from water-level-fluctuating zone (WLFZ) in the central Three Gorges Reservior were investigated in this study. Correlation coefficients between nitrogen forms and sample geochemical characteristics, including soluble organic matter (SOM), pH, oxidation-reduction potential (ORP), and water content of the soil were analyzed. It indicated that total nitrogen(TN) contents in soils varied from 676.0mg·kg-1 to 1769.7mg·kg-1, and the average level was 1182.3mg·kg-1. The nitrogen forms in the soils consisted of non-transferable nitrogen (NTF-N) and transferable nitrogen (TF-N) in all samples, and the average ratio were 53.7% and 46.3% in TN, respectively. The TF-N in soils of WLFZ would become potential pollution sources of water under special environmental conditions. Therefore, the potential effect of nitrogen on water eutrophication in soils of WLFZ could not be neglected. The ratios of weak acid extractable form (WAEF-N) and organic matter-sulfide form nitrogen (OSF-N) in TF-N were high, up to 47.3% and 33.9%, respectively. In terms of the range of various nitrogen forms content and their ratios in TN, the nitrogen forms in the soils could be ordered as WAEF-N > OSF-N > iron-manganese oxides form (IMOF-N) > ion-extractable form (IEF-N). TN has significantly positive correlations with NTF-N(p<0.01), IMOF-N and OSF-N(p<0.05), indicating that the increase of NTF-N, IMOF-N and OSF-N content can lead to the increase of TN content. Furthermore, TN, TF-N, OSF-N was significantly positively related to SOM (p<0.01; p<0.05), indicating that TN, TF-N, OSF-N and SOM probably came from the same pollution source.
%K Three Gorges Reservior
%K water-level-fluctuating zone
%K soil
%K nitrogen forms<br>三峡水库
%K 消落带
%K 土壤
%K 氮形态
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=76E580E86F6366E0F0A8123E156D23FF&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=94C357A881DFC066&sid=6BF76AE9E086F688&eid=6DAA05ECA4CD5075&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=52