The effect of elevated cadmium content in soil on the uptake of nitrogen by plants
Ciecko, Z.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Chemistry) | Kalembasa, S.(Academy of Podlasie, Siedlce (Poland). Dept. of Soil Science and Agricultural Chemistry) | Wyszkowski, M.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Chemistry)E-mail:[email protected] | Rolka, E.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Environmental Chemistry)
The aim of this study was to determine the effect of soil contamination by Cd (10, 20, 30 and 40 mg Cd/kg of soil) and a simultaneous application of different substances (compost, brown coal, lime and bentonite) on the N intake by Avena sativa, Lupinus luteus, Phacelia tanacetifolia, and Zea mays. N concentration in plants depended on the plant species and the degree of soil contamination by Cd. Large doses of Cd caused an increase in N concentration in oat straw and roots as well as in maize roots. Soil Cd resulted in a decrease of N concentration in oat grains, in above-ground parts and roots of Lupinus luteus and Phacelia tanacetifolia, and in above-ground parts of Zea mays. The application of bentonite had the strongest and usually negative effect on the N concentration in plants. The greatest effect of bentonite was on Avena sativa grain, above-ground parts of Zea mays, Lupinus luteus and Phacelia tanacetifolia. N concentrations in plants were generally positively correlated with the concentrations of macroelements and some microelements, regardless of the substances added to the soil.
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