Salinity-heavy metal interactions as evaluated by soil extraction and plant analysis
- Institute of Plant Nutrition and Soil Science, Braunschweig (Germany)
Both heavy metal pollution and saline water irrigation are increasing in the dry areas, especially in developing countries. The effects of soil and water salinity on the transfer of heavy metals to crops are, however, not well understood. The uptake of Zn, Cu and Cd from a polluted desert soil from the north west of Egypt was therefore evaluated in pot experiments with maize, irrigated either with NaCl or with NaCl + CaCl{sub 2} solutions. NaCl accelerated root mortality and increased both the concentration of heavy metals in soil saturation extract and their uptake of heavy metals differently. While the solubility of heavy metals was enhanced by CaCl{sub 2}, both root mortality and the uptake of heavy metals were depressed. It was concluded that salinity of irrigation water affects heavy metal uptake at least partly by modifying root functions. 12 refs., 4 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 482553
- Journal Information:
- Communications in Soil Science and Plant Analysis, Vol. 27, Issue 5-8; Other Information: PBD: 1996
- Country of Publication:
- United States
- Language:
- English
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