EN
The influence of increasing doses lead (6; 12; 24; 48; 96; 192; 384; 500 and 1000 mg Pb per kg of soil) upon onion yield and the content of Pb and Mg in onion was in vestigated under pot experimentcon ditions.The follow in gparts of the test plant were examined: roots, an edible part of transformed shoot - "onion" .scales .tops-" chive". It has been found out that with in the in vestigated doses of lead a depression in yielding occurred with the dose over 384 mg Pb per kg of soil. Roots and scales of onion were characterized by the highest dose of Pb, whereas onion by the lowest dose. The content of the metal ranged. as follows: 3.3 - 95.6 in roots, 5.5 - 212.5 in scales and 3.2-33.8mg Pb per kg ofd.m. in onion. No dependence between a level of soil contamination with lead and content of magnesium in onion was observed, the highest concentration of Mg was characteristicof chive (about 0.90% Mg) and the lowest of onion (about 0.18% Mg).