大连市土壤中汞背景值影响因素分析

主要研究了土类、母岩,质地、有机质、土地利用方式、地貌等不同土壤环境因子对大连市土壤中汞背景值的影响,通过各环境因子变异系数的计算得知影响的主要因素是土地利用方式和母岩。给出了大连市土壤中汞的自然背景含量。分析表明,大连市土壤汞背景值偏高是由于母岩的不同及工农业生产活动的影响所致。

Analysis of Factors Affecting Background Values of Hg in soils of Dalian

The paper mainly discusses different environmental factors, such as soil type, parent rocks, texture, organic matter, land-use types and landform, which affect background values of mercury in soils of Dalian. Through calculation of variable coefficient of each environmental factor, it was found that the background values of Hg in soils are mainly affected by land-use type and parent rock. The natural background values of Hg in soils of Dalian was also obtained. The background values of Hg in soils of Dalian are higher than those in Liaohe River Plain because of different parent rocks and industrial or agricultural activities.