title: Which Factors Determine Metal Accumulation in Agricultural Soils in the Severely Human-Coupled Ecosystem?
abstract: Agricultural soil is typically an important component of urban ecosystems, contributing directly or indirectly to the general quality of human life. To understand which factors influence metal accumulation in agricultural soils in urban ecosystems is becoming increasingly important. Land use, soil type and urbanization indicators all account for considerable differences in metal accumulation in agricultural soils, and the interactions between these factors on metal concentrations were also examined. Results showed that Zn, Cu, and Cd concentrations varied significantly among different land use types. Concentrations of all metals, except for Cd, were higher in calcareous cinnamon soil than in fluvo-aquic soil. Expansion distance and road density were adopted as urbanization indicators, and distance from the urban center was significantly negatively correlated with concentrations of Hg, and negatively correlated with concentrations of Zn, and road density was positively correlated with Cd concentrations. Multivariate analysis of variance indicated that Hg concentration was significantly influenced by the four-way interaction among all factors. The results in this study provide basic data to support the management of agricultural soils and to help policy makers to plan ahead in Beijing.
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China. xuliforever@163.com.|Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China. xuliforever@163.com.
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China. shanshancao1413@sina.com.|Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China. shanshancao1413@sina.com.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Cao
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China. jhwang1995@sina.com.|Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China. jhwang1995@sina.com.
authors.forename: Jihua
authors.initials: J
authors.lastname: Wang
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China. axlu2015@163.com.|Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China. axlu2015@163.com.
authors.forename: Anxiang
authors.initials: A
authors.lastname: Lu
mesh_terms: D000383:Agriculture; D000068476:Beijing; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014507:Urbanization
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants
keywords: heavy metal; interaction; land use; soil type; urbanization