Soluble micronutrients in polluted by oil products soils
2000
Dimitrov, D. | Markov, E. | Dzhokova, M. (Institut po Pochvoznanie i Agroekologiya "N. Pushkarov", Sofia (Bulgaria))
Changes in the content of Cu, Zn, Mn, and Fe, soluble in 0.01M EDTA solution, as well as changes in pH H2O and pH KCl were studied in soils polluted by oil products in 5 levels (0,5000, 10 000, 30 000, and 50 000mg/kg).The content of the soluble micronutrients in EDTA solution was remarkable changed due to the pollution by oil products.According to the decreasing degres of the changes ( the ratio between the content of these element in polluted and in the unpolluted ones) they were ranged: Mn (2.17), Cu (1.88), Fe (1.33), Zn (0.56). By the equivalent ratios Cu/Zn, Fe/Mn, Fe/Zn was found out that in the presence of oil products antagonistic behaviour was appeared, which could cause the increase in Mn toxicity and Zn deficiency for plants.
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