POST-EFFECT OF INCREASING BOTTOM SEDIMENT ADDITIVES TO THE SUBSTRATUM ON LEAD UPTAKE BY PLANTS

The aim of the studies was to estimate the post-effect of bottom sediment addition to the substratum on lead uptaking by the plants under the conditions of pot experiments. Very acid soil and bottom sediment dredged from RoŜnów Reservoir were used for preparation of substrata. Bottom sediment share ranged between 0 and 16 % of substratum mass. Tested plants were grown in orders: maize (Zea mays L.) and horse bean (Vicia faba L., var. minor) as well as oat (Avena sativa L.) and lupine (Lupinus angustifolius L.). The plants were harvested for green mass. The content of Pb in mineralisats obtained from plant material was determined by ICP-AES method. The total quantity of Pb removed with yield of the plants depending on species and part of the plant was compared and changes affected by bottom sediment share in substratum as well as previous plant cultivation were estimated. Under the conditions of substratum contaminated by lead significantly higher amounts of Pb were accumulated in roots than in tops of the plant. In average, the highest Pb contents were determined in lupine roots and horse bean tops, while the lowest data were found in maize roots and tops. Considering total quantity of Pb, the highest amounts were removed with yield of maize, and the lowest with yield of horse bean. The Pb translocation coefficients (TC) (content in the tops versus content in the roots) as well as th