Journal of Geographical Sciences ›› 2010, Vol. 20 ›› Issue (1): 148-156.doi: 10.1007/s11442-010-0148-3

• Environmental Chemistry • Previous Articles    

Content and densities of soil organic carbon in urban soil in different function districts of Kaifeng

SUN Yanli1,2, MA Jianhua1, LI Can3   

  1. 1. Institute of Natural Resources and Environmental Science, Henan University, Kaifeng 475004, Henan, China;
    2. Department of Urban and Environmental Science, Xuchang College, Xuchang 461000, Henan, China;
    3. Personnel Department, Luoyang Engineering College, Luoyang 471003, Henan, China
  • Received:2008-07-12 Revised:2009-05-20 Online:2010-02-15 Published:2010-02-15
  • Contact: Ma Jianhua, Professor, E-mail: mjh@henu.edu.cn E-mail:mjh@henu.edu.cn
  • About author:Sun Yanli (1979–), Ph.D, specialized in soil environment. E-mail: syanli79@yahoo.com.cn
  • Supported by:

    Key Scientific and Technological Research Projects of Henan Province, No.72102150029

Abstract:

Urban soil, forming along with the development of city, has unique properties of soil organic carbon. On the basis of field investigation and laboratory analysis, soil organic carbon (SOC) of Kaifeng city was studied, and the results showed that the characteristics of SOC were different not only among function districts in urban area, but also between urban area and suburbs. The order of SOC in topsoil was industrial district > recreational district > traffic district > cultural/educational district > residential/administrative district. The density of soil organic carbon (SOCD) in both topsoil and profile followed the orders of recreational district > industrial district > traffic district>cultural/educational district > residential/adminis- trative district, and cultural/educational district > traffic district>industrial district>recreational district > administrative/residential district, respectively. SOCD in both topsoil and profile decreased along the transection line from urban area to suburbs and urban area had 2.53-fold more SOCD in topsoil and 1.56-fold more SOCD in profile than suburbs, respectively. SOC decreased with the depth and was mainly distributed within the scope of 0–30 cm. The variances of SOC in urban area were more complicated than that in suburbs.

Key words: Kaifeng city, urban soil, content of SOC, SOCD