%0 Journal Article
%T Characteristics of the Wetland Soil Iron Under Different Ages of Reclamation<br>不同开垦年限湿地土壤铁变化特征研究
%A ZOU Yuan-chun
%A L
%A <br>邹元春
%A 吕宪国
%A 姜明
%J 环境科学
%D 2008
%I 
%X The temporal-spatial trends of soil total iron concentration (Fet), free degree (Fed/Fet), activation degree (Feo/Fed) and complex degree (Fep/Fed) of soil iron oxides after reclamation were studied in Sanjiang Plain Wetlands. The result suggests that Fet in the upper tillage layers (0 - 20 cm) are influenced by reclamation more significantly than that in the lower ones (20 - 100 cm), and so does the early ages (0 - 1 years) than the late ages (1 - 25 years). Fet is negatively correlated with organic matter extremely significantly (R = - 0.62), while that with total phosphorus and pH are not significant. Fet of soil layer I (0 - 10 cm) increases obviously during the first 7 years after reclamation, and tends to become stable after 13 years, while those ages of soil layer II (10 - 20 cm) are 8 years and 15 years respectively. Soil layer I shows shorter responding time and better regularity than layer II. Fed/Fet increases rapidly after reclamation, decreases later and then increases again. Feo/Fed indicates exponential decrease with the reclamation ages as well as Fep/Fed. Feo/Fed of layer I decreases radically during the first 4 years after reclamation and tends to become stable after 13 years, while that of layer II decreases dramatically within the first year and keeps stable henceforth. The counterparts of Fep/Fed are 6 years, 14 years, and 2 years respectively. With the fitted experimental equations of Fet, Feo/Fed, and Fep/Fed, the ages of reclamation can be deduced reversely, which indicates the implication of iron on the shifts of soil environment.
%K marsh wetland
%K soil iron
%K ages of reclamation
%K Sanjiang Plain<br>沼泽湿地
%K 土壤铁
%K 开垦年限
%K 三江平原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=8A7116D1369F40407864D87BB3B2DF08&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=38B194292C032A66&sid=725C082EB6FD280F&eid=F2947E14627CD734&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=24