【摘要】 为探究山西省旱作农业区玉米中重金属(Cu、Zn、Pb、Cd、Cr、Ni、Hg和As)污染特征和影响因素，对寿阳县玉米籽粒样品进行采样调查，采用单因子指数法和内梅罗污染指数法对研究区玉米籽粒中重金属污染进行评价，采用地理探测器对玉米重金属累积的影响因素进行分析。结果表明，研究区玉米籽粒中单个重金属平均含量均未超标，但有7.81%的样点中Pb超标，应给予关注；各乡镇玉米重金属平均含量总体处于清洁安全水平，玉米质量良好，但北部乡镇重金属综合污染指数较中、南部大。地理探测器的因子探测显示，土壤重金属含量和工业企业密度是造成当地玉米中Pb污染和各乡镇玉米重金属累积的主要影响因子，次要影响因子为人口密度和路网密度。交互探测显示，当地玉米中Pb污染和各乡镇玉米重金属累积是多种因素综合作用的结果，以土壤重金属含量和工业企业密度、土壤重金属含量和人口密度及土壤重金属含量与路网密度这三对组合的影响最大。结果表明人类活动是造成当地玉米重金属累积的主要原因，后续应从工业、交通、能源消费、农户等多角度构建绿色农业生产环境。更多还原

【Abstract】 In order to explore the characteristics and factors influencing the heavy metals(Cu, Zn, Pb, Cd, Cr, Ni, Hg and As) pollution in corn kernels in dry farming area of Shanxi province, the corn kernel samples in Shou-yang county were sampled and investigated. This study applied single factor index method and Nemero pollution index method to evaluate heavy metal pollution, applied geographic detectors to analyze factors influencing heavy metal accumulation in corn kernels. The results showed that the average content of each heavy metal in corn kernels does not exceed the evaluation standards, but Pb in 7.81% of the samples exceeded the national food safety standard limit of pollutants in food. The average content of heavy metals in corn kernels in townships is generally at a clean and safe level, indicating that the quality of corn is good, but the comprehensive pollution index of that in northern townships is larger than that in the middle and south. The factor detection of the geographical detector found that the content of heavy metals in soil and the density of industrial enterprises have great explanatory power for Pb pollution and the accumulation of heavy metals in corn kernels in townships, which are the main influencing factors, while the secondary influencing factors are population density and road network density. The interaction detection of the geographical detector found that Pb pollution in corn kernels and the accumulation and spatial differentiation of heavy metals in corn kernels in townships are the result of multiple factors. The combination of soil heavy metal content and industrial enterprise density, soil heavy metal content and population density, soil heavy metal content and road network density has a greater impact. The results showed that human activities are the main reason for the accumulation of heavy metals in corn kernels, and the green agricultural production environment should be constructed from the perspectives of industry, transportation, energy consumption and farmers.更多还原