title: Field controlled experiments of mercury accumulation in crops from air and soil.
abstract: Field open top chambers (OTCs) and soil mercury (Hg) enriched experiments were employed to study the influence of Hg concentrations in air and soil on the Hg accumulation in the organs of maize (Zea mays L.) and wheat (Triticum aestivum L.). Results showed that Hg concentrations in foliages were correlated significantly (p < 0.05) with air Hg concentrations but insignificantly correlated with soil Hg concentrations, indicating that Hg in crop foliages was mainly from air. Hg concentrations in roots were generally correlated with soil Hg concentrations (p < 0.05) but insignificantly correlated with air Hg concentrations, indicating that Hg in crop roots was mainly from soil. No significant correlations were found between Hg concentrations in stems and those in air and soil. However, Hg concentrations in upper stems were usually higher than those in bottom stems, implying air Hg might have stronger influence than soil Hg on stem Hg accumulation.
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100085, China.
authors: Zhenchuan
authors: Z
authors: Niu
authors: Xiaoshan
authors: X
authors: Zhang
authors: Zhangwei
authors: Z
authors: Wang
authors: Zhijia
authors: Z
authors: Ci
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000378:metabolism*; D001272:Atmosphere / Q000737:chemistry; D018556:Crops, Agricultural / Q000737:chemistry / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D008628:Mercury / Q000032:analysis / Q000378:metabolism*; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D014908:Triticum / Q000737:chemistry / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry / Q000378:metabolism
chemical_list: D000393:Air Pollutants; D012987:Soil; D012989:Soil Pollutants; D008628:Mercury