[Estimation of China soil organic carbon storage and density based on 1:1,000,000 soil database].
[Estimation of China soil organic carbon storage and density based on 1:1,000,000 soil database].
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发表时间：
2005-12
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通讯作者：
Dongsheng Yu;Xuezheng Shi;Weixia Sun;Hongjie Wang;Qinghua Liu;Yongcun Zhao
中科院分区：
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作者：
Dongsheng Yu;Xuezheng Shi;Weixia Sun;Hongjie Wang;Qinghua Liu;Yongcun Zhao
基于1：100万土壤数据库，采用空间表达方法，估算了中国土壤有机碳储量和密度。该数据库由1：100万数字土壤图、土壤剖面属性数据库和土壤参考系统组成。数字土壤图包含926个土壤制图单元、690个土壤科、94 000多个多边形;土壤剖面属性数据库收集了7292个土壤剖面，包括81个属性字段。计算土壤剖面的SOCD，并采用“基于土壤类型的GIS连接”方法将其与数字土壤图中的土壤多边形连接，生成1：100万中国SOCD矢量图。国家或土壤的SOCS可以通过对所有多边形或土壤多边形的SOCS求和来估计，其SOCD是由其面积导出的SOCS。估计该国的SOCS和SOCD为89。14 Pg（1 Pg = 10（15）g）和9.60 kg m（-2）分别覆盖了总面积为928.10 x 10（4）km 2的所有土壤，这可能被认为是最接近真实的值。
Based on 1:1,000,000 soil database, and employing the methods of spatial expression, this paper estimated the soil organic carbon storage (SOCS) and density (SOCD) of China. The database consists of 1:1,000,000 digital soil map, soil profile attribution database, and soil reference system. The digital soil map contained 926 soil mapping units, 690 soil families, and 94 000 or more polygons, while the soil profile attribution database collected 7292 soil profiles, including 81 attribution fields. The SOCDs of soil profiles were calculated and linked to the soil polygons in the digital soil map by the method of "GIS linkage based on soil type", resulting in a vector map of 1:1,000,000 China SOCD. The SOCS of the country or of a soil could be estimated by summing up the SOCS of all polygons or the polygons of a soil, and their SOCD were the SOCS of them derived by their areas. The estimated SOCS and SOCD of the country was 89. 14 Pg (1 Pg = 10(15) g) and 9.60 kg m(-2), respectively, covered all the soils with a total area of 928.10 x 10(4) km2, which might be considered closest to the real value.