摘要
通过详细的调查分析,研究了浙江省优势农产区表层土壤重金属分异特征及其现状,并探讨了各种影响因素。904个代表性样品的分析结果表明,除A s和Hg以外,Cd、C r、Pb、Zn、Cu及N i的含量均高于浙江省第2次土壤普查得到的表层土壤重金属含量;与杭嘉湖平原、浙江省、中国及世界土壤背景值的对比发现,研究区土壤大部分重金属元素的含量明显偏高,根据国家二级标准限值得出的单项评价结果表明,Cd和N i的超标指数较高,分别达到10.72%和9.7%,Hg、Pb、Cu和C r次之,分别为6.80%,5.35%,3.43%和3.03%,Zn和A s较小,分别为1.80%和1.04%。此外,通过对不同的土地利用类型、不同母质及土壤类型土壤中重金属含量的方差分析,研究了这些因子对浙江省农业土壤重金属含量的影响程度及其原因。
Heavy metal contents in top soils in agricultural soils of Zhejiang province and their differential characteristics and effecting factors were studied in the presented paper through field soil investigation. Averages of total Cd,Cr, Pb, Zn, Cu and Ni, except As and Hg, in the 004 selected soil samples were higher than the contents in top soils based on the second general survey of soil of Zhejiang province. The result showed that most of the heavy metal contents were enhanced excessively contrasted with the background values of Hangjiahu plain, Zhejiang province, China and the whole world. It was found that heavy metal contents exceed the threshold levels according to the second grade of standards for soil environmental quality of China （GB15618-1995）, the index of excecd the provided standard of Cd, Ni, Hg, Pb, Cu, Cr, As and Zn were 10. 72%, 9.70%, 6.80%, 5.35%, 3.43%, 3.03%, 1.80%and 1.04%, respectively. Moreover, land use, parent material and soil type were analyzed by the variance analysis to study the influence to heavy metal concentrations in agricultural soils by these effective factors.
出处
《水土保持学报》
CSCD
北大核心
2006年第1期103-107,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(40001008)
浙江省科技计划项目(2004C32066)资助
关键词
土壤重金属
分异特征
评价
影响因素
heavy metal in soil
differential characteristics
appraisal
effecting factors
