关键词: 土壤养分, 空间异质性, 生态系统, 景观性质

Abstract: Based on the survey of 35 organic pollutants in the soils of Shenyang suburbs, this paper studied the detection characteristics of the pollutants and their spatial distribution characteristics. Fifteen of the 35 organic pollutants were detected, among which, benzopyrene, hexachlorobenzene, DDT, and BHC had the coefficients of variation >1, and their local enrichment degree was high, with greater fluctuation in concentration. The soil organic pollution in the suburbs presented a pattern of “one more and three less”, i.e., more sampling points with detected organic pollutants, less kinds of detected organic pollutants, less concentration of the organic pollutants, and no sampling points exceeded the standards. Due to the effects of the lithology of soil vadose zone, the suburb soils showed an obvious vertical stratification pattern of organic pollution. It was considered that the regional distribution of suburb soil organic pollution had higher consistency with land use function, and thus, to analyze the main factors affecting the concentrations and distribution characteristics of organic pollutants in suburb soils would be of significance in preventing and controlling the organic pollution of the soils to ensure food security and water safety.

Key words: Soil nutrients, Spatial heterogeneity, Ecosystem, Landscape characteristics