武威地区土壤有机碳库的估算与空间分布特征  

ESTIMATION AND SPATIAL DISTRIBUTION OF SOIL ORGANIC CARBON IN WUWEI DISTRICT

作　　者：吴永强[1] 李春亮[1] 张炜[1] WU Yong-qiang LI Chun-liang ZHANG wei(Geological Survey of Gansu Province, Lanzhou 730000, Chin)

机构地区：[1]甘肃省地质调查院,甘肃兰州730000

出　　处：《甘肃地质》2016年第3期82-85,共4页Gansu Geology

摘　　要：基于甘肃省武威地区多目标区域地球化学调查6 000 km^2的调查系统取得了土壤有机碳等指标,结合土地利用图,土壤类型图等,对武威地区有机碳储量进行了统计及分析,估算出地表0.2 m~、1 m~厚和1.8 m~厚土体的平均单位土壤TOC量分别为1.51×1103 t/km^2、5.53.×103 t/km^2、8.85×103 t/km^2,远远低于全国平均水平。其有机碳空间分布规律为有机碳储量较高的地区分布于双城镇—永昌镇—武威市—武南镇—黄羊镇一带,表现为测区中部相对富集,东部缺失。Proxies such as soil organic carbon content and density were obtained based on the multipurpose regional geochemical investigation of Wuwei, Gansu Province. Combining with the data such as map of land-use and soil type, the carbon reserve in Wuwei was collected and analyzed. The results illustrate that the TOC of average unit in soil in depth of 0.2 m, 1 m and 1.8 m is 1.51×10^3 t/km2, 5.53×10^3 t/km2 and 8.85×10^3 t/km2 respectively, and these are much lower than national average levlel. It also demonstrates that the organic carbon content is higher in the area of Shuangcheng-Yongchang-Wuwei-Wunan-Huangyang, and the content in the central part is relatively concentrated but lack in the eastern part of this area.

关 键 词：土壤有机碳密度 储量估算 空间分布 武威地区 

分 类 号：S153.6[农业科学—土壤学]