Abstract
A field experiment was carried out to determine the effect of different land use systems such as continuous grass and agricultural crops rotation on the bioavailability of heavy metals in soils contaminated by former excessive sewage sludge application. The results show that Cd and Zn concentrations increased to 2 and 3.5 folds within 3 cuts of grass, respectively. Even 10 years after the end of excessive sewage sludge application the concentration of Cd in winter and summer wheat is 3.4 and 2.5 folds higher than the control, respectively. Zn concentration increased by two folds for both crops. In conclusion, the uptake depends on plant species and the degree of soil contamination. The availability of heavy metals was not changed with time.
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Acknowledgement
The authors thank Mrs. Maria Ruckwied for ICP-MS measurements and Mr. Hans Bucher for managing the field work
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Al-Najar, H., Schulz, R., Breuer, J. et al. Effect of cropping systems on the mobility and uptake of Cd and Zn. Environ Chem Lett 3, 13–17 (2005). https://doi.org/10.1007/s10311-005-0105-z
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DOI: https://doi.org/10.1007/s10311-005-0105-z