Plant Soil Environ., 2018, 64(3):132-137 | DOI: 10.17221/755/2017-PSE

Effect of tree harvest intervals on the removal of heavy metals from a contaminated soil in a field experimentOriginal Paper

Pavla KUBÁTOVÁ, Jiřina SZÁKOVÁ, Kateřina BŘENDOVÁ, Stanislava KROULÍKOVÁ-VONDRÁČKOVÁ, Markéta DREŠLOVÁ, Pavel TLUSTOŠ*
Department of Agroenvironmental Chemistry and Plant Nutrition, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague 6 - Suchdol, Czech Republic

Four clones of short rotation coppice (SRCs) were investigated for phytoextraction of soil contaminated by risk elements (REs), especially Cd, Pb and Zn. As a main experimental factor, the influence of rotation length on the removal of REs was assessed. The field experiment with two Salix clones (S1 - (Salix schwerinii × Salix viminalis) ×S. viminalis; S2 - S. × smithiana) and two Populus clones (P1 - Populus maximowiczii × Populus nigra; P2 - P. nigra) was established in April 2008 on moderately contaminated soil. For the first time, all clones were harvested in February 2012 (20124y) after 4 years. Subsequently each plot was equally split into halves. The first half of the SRC clones was harvested in February 2014 after 2 years (20142y) and again it was harvested in February 2016 after further 2 years (20162y). The second half was harvested in February 2016 after 4 years (20164y). The results showed that the biomass production for the second 4-year harvest period was significantly higher for all clones but the metal concentration was lower in the mentioned period. 4-year rotation seems to be more advantageous for the phytoextraction than two 2-year rotations. The highest metal removal presented by remediation factors (RFs) per 4 years for Cd (6.39%) and for Zn (2.55%) were found for S2 in the harvest 20164y treatment. Removal of Pb was the highest by P1 clone with very low RF per 4 years (0.04%). Longer rotation is also economically superior.

Keywords: willow; poplar; cadmium; lead; zinc; contamination

Published: March 31, 2018  Show citation

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KUBÁTOVÁ P, SZÁKOVÁ J, BŘENDOVÁ K, KROULÍKOVÁ-VONDRÁČKOVÁ S, DREŠLOVÁ M, TLUSTOŠ P. Effect of tree harvest intervals on the removal of heavy metals from a contaminated soil in a field experiment. Plant Soil Environ. 2018;64(3):132-137. doi: 10.17221/755/2017-PSE.
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