Forms of trace metals from inorganic sources in soils and amounts found in spring barley
✍ Scribed by Anna Chlopecka
- Publisher
- Springer Netherlands
- Year
- 1993
- Tongue
- English
- Weight
- 410 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0049-6979
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✦ Synopsis
Barley (Hordeum vulgare L.)
was grown on a sandy soil given different doses of cadmium carbonate (salt), copper carbonate (malachite), lead carbonate (cerussite), and zinc carbonate (smithsonite) in a pot experiment conducted in a greenhouse. The element compounds were added to the soil in amounts equivalent to the following levels of the metals: Cd 5, 10, 50 txq -1; Cu and Pb 50, 100, 500 ~g g-l; Zn 150, 300, 1500 ~xg g 2. Sequential extraction was used for partition these metals into five operationally-defined fractions: exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and residual. The residue was the most abundant fraction in the untreated soil for all the metals studied (43 to 61% of the total contents). The concentration of exchangeable Cd (0.2 ~g g ~), Cu (0.01 Ixg g-l), Pb (0.1 ~xg g-l), and Zn (1.4 ttg g t) were relatively low in the untreated soil but increased markedly in the treated soils for Cd (up to 31 gg g ~) and Zn (up to 83 ~g g-~), whereas only small changes were observed for Cu and Pb. The pot experiment showed a significant increase in the Cd and Zn contents of barley grown on the treated soils, but only small changes in Cu and Pb concentrations.