Effect of Freezing-Thawing Process on Wetland Soil Iron  

作　　者：Yuanchun Zou,Xianguo Lu,Ming Jiang,Xiaofei Yu Key Laboratory of Wetland Ecology and Environment,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China. 

出　　处：《地学前缘》2009年第S1期237-237,共1页Earth Science Frontiers

摘　　要：The iron concentrations of snows,semi-melting snows,snowmelts,and ditch waters were observed in four typical microhabitats,Carex lasiocarpa marsh(Ⅰ), Calamagrostis angustifolia wet meadow(Ⅱ),dry land (Ⅲ)and paddy field(Ⅳ),of Sanjiang Plain Wetland, Northeast China.Each sample was collected from three sites of one microhabitat,mixed together, filtrated with 0.45μm membrane,and tested using atomic absorption spectrometry(AAS)for iron measurement.The iron concentrations of soil solutions were investigated as well.Each soil solution was in-situ extracted by negative pressure,filtrated with 0.45μm membrane,and tested using AAS,too. The results showed that the wet precipitation of iron from snow were little to detect.The loss of iron was attributed to the interaction of water and soil surface. The iron concentrations of snowmelts were 7.4,15,

关 键 词：FREEZING-THAWING PROCESS IRON WETLAND SOIL Sanjiang PLAIN 

分 类 号：S153.6[农业科学—土壤学]