Basing on the 1:1 000 000 soil database of China and the data from China's second soil survey, this paper compiles 736 soil profiles in Northeast China to estimate it's organic carbon storage with the method of GIS. This paper also discusses the spatial distribution characteristics of soil organic carbon density. The results show that the average soil organic carbon density is 16.13 kg/m2 in the region. And it's spatial distribution trend is high in northeast and low in southwest. The highest carbon density is mainly in virgin forest soils, marsh soils and part of agriculture soils. The soil types with the highest organic carbon density are peat soils and bog soils, and the lowest are Lithosols and Aeolian sandy soils. In the total area of 7.86?105 km2 soils in this region, soil organic carbon storage in top 0-1m and top 0-20cm are 12.68Gt and 4.63Gt, respectively. The top 0-20cm carbon storage accounts for 36.5% of the top 0-1m storage. Soil organic carbon storage is mainly distributed in dark brown earth, meadow soils and bog soils. But in mountain meadow soils and Lithosols, carbon storage is less.
SUN Wei-Xia, SHI Xue-Zheng, YU Dong-Sheng, WANG Ku, WANG Hong-Jie
. Estimation of Soil Organic Carbon Storage Based on 1:1M Soil Database of China —A Case in Northeast China[J]. SCIENTIA GEOGRAPHICA SINICA, 2004
, 24(5)
: 568
-572
.
DOI: 10.13249/j.cnki.sgs.2004.05.568
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