Field controlled experiments of mercury accumulation in crops from air and soil

► Hg accumulation in crop organs was studied by OTCs and soil Hg enriched experiments. ► Hg accumulation in foliages and roots was mainly from air and soil, respectively. ► Air Hg had stronger influence than soil Hg on stem Hg accumulation. ► Foliar Hg concentrations showed the trend of increase over growth stages.