中国土壤有机碳密度和储量的估算与空间分布分析
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* 中国准备初始国家信息通报的能力建设项目(CPR/00/G31/A/1G/99)资助


ORGANIC CARBON DENSITY AND STORAGE IN SOILS OF CHINA AND SPATIAL ANALYSIS
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    摘要:

    基于1:400万的<中华人民共和国土壤图>和第二次土壤普查数据,运用地理信息系统技术,对中国土壤有机碳密度及储量做出估算,并且分析了土壤有机碳密度的空间分布差异.结果表明:100cm深度的土壤有机碳密度介于1.19kg m-2到176.46kg m-2之间,20cm深度的土壤有机碳密度介于0.27kg m-2到53.46kg m-2之间;100cm和20cm深度的土壤有机碳储量分别为84.4Pg(1Pg=1015g)和27.4Pg;土壤有机碳密度具有高度的空间变异性,东北地区、青藏高原的东南部、云贵高原等森林、草甸分布的地区有机碳密度最高,准噶尔盆地、塔里木盆地、阿拉善高原与河西走廊、柴达木盆地等沙漠化地区的土壤有机碳密度最低;土壤有机碳密度的空间分布主要受气候、植被以及人类活动的影响.

    Abstract:

    Soil organic C plays an essential role in carbon cycle and carbon storage in a native ecosystem reflects that ecosystem.s capacity to sequester carbon.Based on soil map of China(1:4 000 000)combined with a soil database from the second soil survey of China,soil organic carbon storage to the depths of 100 cm and 20 cm were estimated for China using geographical information system.Carbon density of different soil types ranged from 1.19 kg m-2 to 176.46 kg m-2 at depth of 100 cm,and from 0.27 kg m-2 to 53.46 kg m-2 at depth of 20 cm.In total,about 84.4 Pg was stored in 0~100 cm,and 27.4 Pg in the 0~20 cm soil layer.The amount of carbon varied significantly at different districts in China.Northeast China, the south and east of Qinghai-Tibet Plateau and southwest China had high carbon density.Tarim Basin,Caidam Basin,Junggar Basin and other desert ification districts had low carbon density.This distribution showed an important climatic influence.Soil organic carbon would diminish with decreasing precipitation and increasing temperature.On the other hand,the activities of human beings may affect the range of soil carbon.

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解宪丽,孙波,周慧珍,李忠佩,李安波.中国土壤有机碳密度和储量的估算与空间分布分析[J].土壤学报,2004,41(1):35-43. DOI:10.11766/trxb200301140106 Xie Xianli, Sun Bo, Zhou Huizhen, Li Zhongpei, Li Anbo. ORGANIC CARBON DENSITY AND STORAGE IN SOILS OF CHINA AND SPATIAL ANALYSIS[J]. Acta Pedologica Sinica,2004,41(1):35-43.

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  • 收稿日期:2003-01-14
  • 最后修改日期:2003-06-04
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  • 在线发布日期: 2013-02-25
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