Transport of Cu, Zn, Pb and Cd by spring barley cultivation on contaminated soils
2006
Rajčáková, Ľ.,Slovak Centre of Agricultural Research, Nitra (Slovak Republic) | Gallo, M. | Mlynár, R.
The transport of copper, zinc, lead and cadmium among soil, roots and above ground phytomass of spring barley in dependence on the level of soil contamination was observed in pot experiments. Barley (variety Sladko) was cultivated on a substrate that had been contaminated with polymetallic imission dust at a dose of 48-150-300 g per square m. Atomic absorption spectrophotometry method was used to determine the Cu, Zn, Pb and Cd levels in the soil, roots and above ground phytomass of barley. The transfer coefficients were determined on the basis of these values. Based on the transfer coefficients highest intensity of metallic ion transport was found to occur between soil and roots while the least of all transport activity was observed between roots and above ground phytomass. Ions of the investigated elements were transported between soil and above ground phytomass as well as between roots and above ground phytomass in the translocation order of Zn > Cd > Cu > Pb. With the increasing levels of heavy metals in the soil their accumulation in the plants increased, too (Cu 5.98 - 10.95 mg, Zn 19.25 - 31.35 mg, Pb 0.66 - 2.84 mg and Cd 0.05 - 0.11 mg per kilogram of dry matter). The higher concentrations of metals were found in roots and lowest concentrations in above ground phytomass of barley.
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