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| Titel |
Degradation of forest soils near an industrial zone |
| VerfasserIn |
Lenka Pavlů, Ondřej Drábek, Lubos Boruvka |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088456
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| Publikation (Nr.) |
 EGU/EGU2014-2560.pdf |
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| Zusammenfassung |
| Forest soils near industrial zones could be endangered by acid deposition and by
contamination by potentially toxic elements (PTEs). The Silesian Beskids represents a
feasible example of these two types of forest soils damage. Soils of this area are strongly
acid. The surface enrichment by several studied PTEs (Cd, Cu, Pb, Zn) reflects anthropogenic
contamination. Moreover, acid character of soils enables presence of dangerous forms of Al.
Two forms of all these PTEs were evaluated; potentially mobilized and mobile —
the most danger form. Negligible amounts of Cu, Pb, and Al3+ are found in the
mobile form. These elements represent just a potential risk for the system. The
mobile forms of Cd, Zn, and Mn account for approximately 30% of potentially
mobilized forms in organic horizons. In the mineral horizon, Cd and Zn represent
only about 20% and Mn less than 10% of potentially mobilized forms. These
elements could pose a problem to ecosystem vitality. Cadmium is phytotoxic in small
concentrations and its content in mobilized form approaches the critical load. For
this reason, Cd could be considered as the most dangerous element in the studied
area. While the distribution of mobile Cd is control by cation exchange capacity
and hydrolytic acidity in the mineral horizon, stabilization of Cd in potentially
mobilized form in organic horizons is enhanced by organic matter quality. A limiting
nutrient could be P. Phosphorus plays an important role in the immobilization of toxic
Al forms by creation of stable complexes as it was proven by a factor analysis in
the H horizon. Negative aspect of this fact is decrease of bioavailability of P for
plants.
With regard to decreasing emissions, it is important to focus on the stabilization of PTEs
deposited into the soil in the past. It is necessary to keep a relatively high quality of organic
matter (connected to high CEC), higher pH, and higher nutrient content. This state could be
temporarily achieved by the chemical amelioration. However, a more sufficient and long
term solution would be the planting of broadleaf trees with higher quality of the
litter.
This study was supported by the grant No. QI112A201 of the Czech Ministry of
Agriculture. |
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