The contribution of atmospheric deposition of cadmium and lead to their accumulation in rice grains

Over-accumulation of cadmium and lead in rice grain is a global concern as it has adverse health impacts. Atmospheric deposition an important source heavy metal accumulation soil, but contribution to crops not been quantified the mechanisms foliar Cd Pb uptake via stomata leaves exposed atmospheric fallout are unclear. To quantify on grains, pot experiment with four exposure treatments (T1, all day without geotextile membranes; T2, T3, daytime T4, night membranes) using severely (ZZ) moderately (XT) polluted soils was conducted. content shoots roots T1 > T3 T4 XT soils, ZZ while both T3. contents grains showed same trend. Using isotope ratios tracing method (114/111Cd, 112/111Cd, 207/206Pb, 208/206Pb), can be concluded that 63.55% 18.01% for Cd, 27.69% 41.13% respectively. Foliar had substantial effect control should paid more attention maintain safety production.