Relation between soil characteristics and heavy metal content in Virginia tobacco

摘要

The study was conducted on alluvial-meadow soils (Fluvisols), cinnamonic forest soils (Chromic Luvisols) and smolnitzi (Vertisols) with Virginia tobacco. pH, humus, total content and mobile forms of Pb, Cd, Cu and Zn in soils, as well as concentrationof the elements in roots and aboveground biomass of tobacco were specified. Statistically significant dependencies between soil reaction and Cd content in leaves, stems and blossoms of Virginia tobacco were established. pH increase led to reduction of Pb, Cu and Zn concentration in plant organs but these relations were not statistically proven. The humus content influenced Pb and Cd accumulation in leaves of the three harvesting zones and of Cu in stems and blossoms. Statistically significant dependencies with varying degree of correlation were established between total Pb, Cd, Cu, Zn content, their mobile forms in soil and element concentration in plant organs (mainly in leaves) of Virginia tobacco. The obtained regression dependencies in the soil-tobacco system may be used for solving various scientific as well as scientific and practical tasks for prognostication and prevention of tobacco heavy meal contamination.