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| RESERVES ESTIMATION AND SPATIAL DISTRIBUTION OF THE ORGANIC CARBON POOL IN LANZHOU-BAIYIN AREA, GANSU PROVINCE |
| LIU Wen-hui, LI Chun-liang, WU Yong-qiang |
| Geological Survey of Gansu Province, Lanzhou 730000, China |
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Abstract As a key component of land carbon storage, the soil organic carbon storage plays an important role in the study of land carbon recycle. On the basis of multiple target geochemical survey data and distribution of different types of soil in Lanzhou-Baiyin area, the organic carbon density and storage in surface soil (from 0 to 20 cm) were estimated to illustrate its spatial distribution characteristics. The results show that the average surface soil organic density in Lanzhou-Baiyin area ranges from 1.52 to 7.73 kg/m2. The soil organic density in Yuzhong is higher than that in other areas and reaches 2.69 kg/m2, while the density in Huining is the lowest and reaches 1.56 kg/m2. As for soil types, the soil organic carbon density in meadow is the highest and its density reaches 7.73 kg/m2. Soil carbon density in gray cinnamonic soil, chestnut soil and lithosol ranges from 2.96 to 5.18 kg/m2, and that of red clay and light grey desert soil ranges from 1.52 to 1.53 kg/m2. Viewed from land use status, the soil organic carbon density in woodland is the highest, and it should be affected by the climate, vegetation and human activity.
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Received: 12 May 2011
Published: 10 June 2012
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