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		黔西北地区土壤重金属地球化学背景及管理目标值
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			Geochemical background and management target values of heavy metals in soil in northwestern Guizhou Province
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| 图2. 黔西北地区深层土壤As、Cd、Cr、Cu、Hg、Ni、Pb和Zn空间分布 | 
| Fig.2. Spatial distribution of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in deep soil of northwest Guizhou | 
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