摘要
以松嫩平原北部作为研究区,以多目标区域地球化学调查成果作为数据基础,采用多元统计与地统计相结合的方法,对土壤重金属背景值及累计特征进行研究。结果表明:(1)松嫩平原北部土壤重金属背景值与1986年测得的背景值相比,As、Cr、Cd、Cu、Ni、Pb、Zn均升高;在不同地貌单元条件下,背景值差异显著;(2)分别以全区域和地貌单元条件下的背景值作为参考标准,表层重金属Hg、Cd、Cr均产生了累积;较全区域背景值而言,不同地貌条件下的背景值更能反映重金属累积状况;(3)松嫩平原北部重金属空间分布含量较高的区域主要集中在中东部,而在西南部相对较低。
Taking Northern Songnen Plain as research area, and the results of multi - objective geochemical survey as the data source, the background value and cumulative characteristics of soil heavy metals were studied with the method of multivariate statistics and geostatistics. The results showed that：（1） Compared with the background values measured in 1986, the background values of As, Cr, Cd, Cu, Ni, Pb and Zn increased, while they were significantly different among various quaternary landform types. （2） Based on the background values atthe whole region and the geological and geomorphological conditions, the contents of Hg, Cd and Cr were accumulatedin surface soil. However, the background value under the geological and geomorphological conditions could better reflect the accumulation of heavy metals in topsoil than that at the whole region. （3） The higher content of heavy metals was mainly concentrated in the middle and eastern regions, while the lower content was distributed in the southwest areaof Northern Songnen Plain.
出处
《土壤通报》
CAS
北大核心
2018年第1期176-183,共8页
Chinese Journal of Soil Science
基金
黑龙江省博士后基金项目(LBH-Z12032)资助
关键词
松嫩平原北部
土壤重金属
背景值
累积特征
空间分布
Northern Songnen Plain
Soil heavy metals
Background value
Accumulation
Spatial distribution
作者简介
张慧（1976-），女，博士研究生，副教授，主要研究方向为土地质量和土地利用。E-mail：2003zhanghui@163.com;通讯作者：E—mail：1341842809@qq.com．
