中国蔬菜土壤重金属含量和来源分析_曾希柏.pdfVIP

2007,40(11):2507-2517 Scientia Agricultura Sinica / 100081 · · Heavy Metal Content in Soils of Vegetable-growing Lands in China and Source Analysis ZENG Xi-bai, LI Lian-fang, MEI Xu-rong (Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences/ Key Laboratory of Agro-Environment and Climate Change, Ministry of Agriculture, Beijing 100081) Abstract: Objective The objective of this investigation was to study the content of heavy metals in soils of vegetable lands systematically through assessment objectively to promote the development of vegetable production with high quality and efficiency. MethodStatistical analysis of reported data on the heavy metals in Chinese vegetable plantation soils, from previous literatures published since 1989 was carried out systematically in this investigation. Result It is concluded that Zn, Cr, Cu had relatively high concentrations while the mean concentrations of toxic metals, As, Hg, Cd was 8.03, 0.12, 0.28 mg·kg-1 separately with comparatively low concentrations in vegetable lands in China. Compared to Chinese Soil Quality Criterion GB 15618-1995 (6.5 pH 7.5), about 24.1%, 10.3%, 9.2% of the total samples was contaminated by Cd, Hg and As respectively, and the descending order of heavy metals was Cd Hg As Zn Cu Cr Pb. When compared among different regions, the relatively serious heavy metal contamination was found in eastern China vegetable lands and the main contamination elements were Cd, Hg and Zn. In the mid region, vegetable plantation land soil was mainly polluted by As and Cd, as well as Hg, Zn and Cu in some extent. In the west region of China, Cd and As contamination was also observed in some degrees