Welcome to Journal of University of Chinese Academy of Sciences,Today is

›› 2009, Vol. 26 ›› Issue (3): 350-356.DOI: 10.7523/j.issn.2095-6134.2009.3.009

• Research Articles • Previous Articles     Next Articles

Scaling effect on spatial variability of soil organic matter in crop land

ZHANG Fa-Sheng1,2, LIU Zuo-Xin1, ZHANG Ying1, MIAO Yong-Gang1,2, QU Wei1,2, KANG Zhen-Jun1,2   

  1. 1. Key Laboratory of Liaoning Water-saving Agriculture, Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China;
    2. Graduate University,Chinese Academy of Sciences,Beijing 100049,China
  • Received:2008-12-09 Revised:2009-02-18 Online:2009-05-15

Abstract:

Data of 1024 samples collected from a 10.24hm2 crop land in dense grid of 10m×10m were used to analyze the scaling effect on spatial variability of soil organic matter(SOM)by re-sampling to change sampling extent and resolution.Within the sampled area, soil organic matter had weak variability as CV≤3.43%, but it was entirely low in the content no more than 1.04%.The results showed that spatial variability of soil organic matter increased with the ascending extent at different degrees, while spatial dependency and correlation distance increased distinctly.With contrast to the change of extent, descending resolution can not result in spatial variability of SOM varying orderly, but descended spatial dependency, and increased the correlation distance constantly.

Key words: soil organic matter(SOM), spatial variability, scaling effect

CLC Number: