摘要
以山东省寿光市蔬菜种植基地为研究区,通过数理统计与地统计学空间分析的方法,研究了寿光市表层土壤中的重金属质量分数及其空间分布特征,并在地理信息系统支持下绘制土壤重金属的空间分布图。结果表明:寿光市表层土壤中重金属质量分数平均值低于食用农产品产地环境质量标准(HJ332-2006)。除Zn、Pb和As3种元素外,其他5种重金属元素(Cu、Cd、Cr、Hg、Nr)呈现出正偏态的分布特征,所有重金属元素分布峰的顶点均超出正态分布的最高点。空间分析结果表明,8种重金属元素在寿光市表层土壤中的质量分数呈中等程度的空间相关性。土壤中各重金属的分布呈现出中部、南部、东南部质量分数较高,北部、东北部与西南部质量分数较低的空间分布特征。寿光表层土壤中的重金属质量分数受到自然因素与人为因素的双重影响。
Through the mathematical statistics and geo-statistical spatial analysis method, the soil heavy metal content and its characteristics of spatial distribution in vegetable growing area in Shouguang city were researched, and the spatial distribution map of heavy metals based on the geography information system （GIS） was plotted. The results showed that the average contents of the heavy metals in surface soil in Shouguang city were lower than those in farmland environmental quality evaluation standards for edible agricultural products （HJ332-2006）. Five heavy metals （Cu, Cd, Cr, Hg, Nr） followed a positively skewed distribution, except for Zn, Pb and As, and the vertexes of all heavy metals in frequency plots exceeded those of the normal distribution plots. The results of spatial analysis showed that there were middle relations of all eight heavy metals in surface soil in Shouguang city. The distribution of heavy metals was higher in middle, south and east-south soil but lower in north, east-north and west-south soil in Shouguang city. The heavy metal content in the surface soil in Shouguang city was affected by the natural and artificial factors.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第10期258-263,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
中国地质调查局项目(200314200023)
山东省滨州学院"博士研究生奖励基金"(2007Y07)
关键词
土壤
重金属
GIS
空间分布
寿光市
soils
heavy metals
geographic information systems
spatial distribution
Shouguang city
