Soll geochemical baseline values and environmental background val- ues in Zhejiang, China

The soil geochemical baseline values for main agricultural areas of Zhejiang Province are divided into 13 statistical units and the soil environmental background values are divided into three geographical statistical units,i.e.the Hangzhou-Jiaxing-Huzhou and Ningbo-Shaoxing plains of northern Zhejiang,coastal Wenzhou-Huangyan and Wen-Rui plains of eastern Zhejiang and Jinhua-Quzhou basin of central Zhejiang.The division is made according to the types of soil-forming parent materials,based on the regional geochemical data obtained during agro-geological environmental survey in Zhejiang Province(2002-2004)and following the basic concept of geochemical background values.The mean values,standard deviations and variation coefficients of 52 elements(oxides)were obtained after eliminating anomalous values repeatedly.The soil geochemical baseline and environmental background values are basic geochemical data for the formulation of regional soil environmental quality standards and assessments and remediation of soil pollution.