The Spatial Distribution of Soil Organic Carbon Storage and Change under Different Land Uses in the Middle of Heihe River

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  • 1. The College of Environment and Planning of Henan University, Kaifeng, Henan 475000, China;
    2. College of Resource and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China;
    3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China

Received date: 2010-10-18

  Revised date: 2010-12-28

  Online published: 1997-08-20

Abstract

Spatial distribution of soil organic carbon density, storage and its change are researched under different land uses in the middle of Heihe River, based on the multi-methods of gathering field samples, laboratory analysis, GIS spatial analysis model and remote sensing. The results show that obvious spatial otherness of total soil carbon (TOC), active organic carbon (AOC), nonactive organic carbon (NOC) exist under different land uses. NOC density is consistent with TOC, but density of AOC is different. It indicates that impacts of land use changes on TOC, AOC and NOC are different. According to the calculation result, storage of TOC, AOC and NOC is 94.72 Tg, 45.12 Tg and 49.60 Tg in 1m depths, respectively. AOC account is for 47.63% and NOC is 52.36%. It’s found that the relationship between SOC and influencing factors is more authentic if AOC and NOC are introduced.

Cite this article

ZHANG Jun-hua, LI Guo-dong, NAN Zhong-ren, XIAO Hong-lang, ZHAO Zi-sheng . The Spatial Distribution of Soil Organic Carbon Storage and Change under Different Land Uses in the Middle of Heihe River[J]. SCIENTIA GEOGRAPHICA SINICA, 2011 , 31(8) : 982 -988 . DOI: 10.13249/j.cnki.sgs.2011.08.982

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