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基于GIS的山东寿光蔬菜产地土壤重金属空间分布特征
引用本文:刘 庆,杜志勇,史衍玺,庞绪贵.基于GIS的山东寿光蔬菜产地土壤重金属空间分布特征[J].农业工程学报,2009,25(10):258-263.
作者姓名:刘 庆  杜志勇  史衍玺  庞绪贵
作者单位:1. 滨州学院山东省黄河三角洲生态环境重点实验室,滨州,256603;青岛农业大学资源与环境学院,青岛,265200
2. 青岛农业大学资源与环境学院,青岛,265200
3. 山东省地质调查院,济南,250013
基金项目: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)
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As 3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。

关 键 词:土壤,重金属,GIS,空间分布,寿光市
收稿时间:2008/8/25 0:00:00
修稿时间:9/4/2009 12:00:00 AM

Spatial distribution charicteristics of soil heavy metals in vegetable growing area based on GIS in Shouguang city, Shandong province
Liu Qing,Du Zhiyong,Shi Yanxi and Pang Xugui.Spatial distribution charicteristics of soil heavy metals in vegetable growing area based on GIS in Shouguang city, Shandong province[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(10):258-263.
Authors:Liu Qing  Du Zhiyong  Shi Yanxi and Pang Xugui
Abstract: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.
Keywords:soils  heavy metals  geographic information systems  spatial distribution  Shouguang city
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