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《Journal of Anhui Agricultural Sciences》 2009-11
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Distribution Characteristics of Iron Species in Urban Soils under Different Land-use Patterns

YUAN Da-gang et al (State Key Laboratory of Soil and Sustainable Agriculture,Nanjing Institute of Soil Science,Chinese Academy of Sciences,Nanjing,Jiangsu 210008)  
[Objective] The research aimed to study the distribution characteristics of soil iron Species in Urban Soils under different land-use patterns and provide the scientific basis for remediation of heavy metal and organic pollutants.[Method] The sample of soil section on the road,greenbelt and vegetable plot with the same parent material was screened in urban Nanjing to measure Fet,Fed and Feo and related index.Their statistical analysis was made and the profile distribution picture was drawn,and the distribution characteristics of soil iron in city under different land use patterns and their reasons were discussed.[Result] The different land use patterns in city induced the decrease of Fet and Fed in soil,but the Feo was increased.From the vertical distribution of aging or activation indexes of iron and iron species,under the different land use patterns,the appeared extreme high value had different range of soil depth,which existed at the deeper position of road soil and greenbelt soil and also existed at the shallower position of vegetable plot soil.[Conclusion] The decrease of free iron content,the increase of the active iron content in soil in city and the position of appeared peak value related to land use patterns,which had the great significance on the migration and transformation of heavy metal and organic pollutants.
【Fund】: 国家自然科学基金重点项目(40625001);; 中国科学院知识创新工程方向性项目(KZCX2-YW-409);; 四川农业大学青年科技创新基金
【CateGory Index】: X53
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