Spatial distribution of the soil trace elements in Hailun City
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摘要: 以海伦市研究区1 175件表层(0~20 cm)土壤样品主要微量元素(B、Cu、Mn、Mo、Zn)的实测含量为研究对象,采用地统计学与GIS相结合的方法,对土壤微量元素的含量及空间分布特征进行分析。结果表明:研究区表层土壤中B和Mo含量较缺乏;Mn和Mo的块金效应大于75%,空间自相关性弱,B、Cu和Zn块金效应在25%~75%之间,属于中等空间相关,空间变异主要受到自然因素影响;B和Cu的空间分布相似,由中心向四周逐渐减少,Mn和Mo含量呈明显带状分布,Zn含量北部高于南部。微量元素之间既存在着共生关系,也可能存在拮抗关系。土壤有机质含量、成土母质、土壤类型和土地利用对微量元素均有不同程度的影响。Abstract: Based on the measured contents of the main trace elements (B, Cu, Mn, Mo, and Zn) in 1175 surface soil samples (sampling depth: 0~20 cm), this study analyzed the contents and spatial distribution characteristics of the trace elements in the soil in Hailun City using both geostatistics and geographic information system (GIS). The results are as follows. The surface soil in the city is deficient in B and Mo. Elements Mn and Mo in the surface soil have nugget-to-sill ratios greater than 75%, with weak spatial autocorrelation. Elements B, Cu, and Zn in surface soil have nugget-to-sill ratios of 25%~75%, with moderate spatial correlation, and their spatial variations are mainly affected by natural factors. Elements B and Cu in the surface soil have similar spatial distribution, with the contents gradually decreasing from the center to the surroundings of the city. The Mn and Mo contents in the surface soil show an obvious zonal distribution, and the Zn content is higher in the north than in the south. There are both symbiotic and antagonistic relationships among trace elements. The soil organic matter content, soil parent materials, soil type, and land uses have different effects on the trace elements in the surface soil in the city.
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Key words:
- trace elements /
- geostatistics /
- ArcGIS /
- spatial distribution /
- Hailun City
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