Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (11): 1019-1026.doi: 10.11934/j.issn.1673-4831.2018.11.009

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Contamination Assessment and Spatial Distribution of Heavy Metals in Greenhouse Soils in China

MENG Min1,2, YANG Lin-sheng1,2, WEI Bing-gan1, LI Hai-rong1,2, YU Jiang-ping1   

  1. 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-10-27 Online:2018-11-25 Published:2018-11-21

Abstract:

In order to evaluate the contamination level and explore the spatial distribution pattern of heavy metals in greenhouse soils of China, the peer literatures on heavy metals in greenhouse soils since 1997 were systematically reviewed and the data analyzed. The results indicate that the heavy metals in greenhouse soils of China generally showed a spatial distribution pattern. The concentrations of Cd, Pb and Hg in greenhouse soils are higher in the south, the concentrations of As, Cu, Zn and Cr are higher in the north, while the value for Ni is the highest in the northwest. Moreover, 41.7%, 54.5% and 11.1% of soil sample sites from the south, north and northwest, respectively, showed higher Cd concentration than the standard value for farmland of greenhouse vegetables production; while for Pb concentration, 33.3%, 18.2% and 0 of the soil sample sites in the three regions respectively, exceeded standard value. The geo-accumulation index shows that for the greenhouse soils in China, Cd pollution is the most serious, followed by Hg pollution. In addition, the concentrations of heavy metals accumulated in greenhouse soils in China increase accordingly with planting years, and the heavy metals concentrations decrease with the soil layer. The main source of heavy metals in greenhouse soils is fertilizer, especially manure.

Key words: greenhouse farmland, soil, heavy metal, contamination assessment

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