Uptake of heavy metals by plants
1995
Kanger, J. | Kaerblane, H. (Estonian Research Inst. of Agriculture, Saku (Estonia))
The pot trials were carried out to investigate how the content of heavy metals in plants depended on the concentration of these elements in the soil. Different amounts of heavy metals (Pb, Cd, Hg) were applied into the soil (sandy Podzol) in liquid form to get the current concentration. Ryegrass (Lolium perenne ) and radish (Raphanus sativus) were grown as indicator plants. The trial results showed that applying Pb, Cd and Hg in different amounts into the soil increased the concentration of these elements both in soils and plants. It was obtained that the plants assimilated the most of Cd among the heavy metals added. Depending on the amount of the added Cd into the soil the assimilated part made up to 0.15-0.47 per cent in ryegrass and 0.05-0.20 per cent in radish. The assimilation rate of Pb was lower than of Cd especially in the case of radish. The yield of radish contained Pb in the amounts of 0.0006-0.0033 per cent of which was added into the soil. The amount of Hg in the yield of ryegrass made up to 0.006-0.020 per cent of which was added into the soil and 0.012-0.043 per cent in the yield of radish. The following regularity was obtained: in case of increasing the amount of added Hg into the soil the part of assimilated Hg decreased
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