Uptake of Trace Elements by Barley in Zinc-Polluted Soils

Analysis of zinc-polluted soils and the barley plants grown in these soils shows a relatively higher concentration of Cd, Hg, Pb, and As. The average values of Cd, Hg, Pb, and As in soils are 5.9, 0.36, 104, and 4.4 ppm, respectively, and those in barley plants are 1.65, 0.10, 1.20, and 0.12 ppm, respectively. The levels of Se, Cr, and V are, however, in the normal concentration range. Applied zinc has no real effect on the content and uptake of the trace elements concerned in barley. The results indicate that contamination of soils with Cd, Hg, Pb, and possibly As has occurred, and is presently occurring, in this area.