Metal uptake in maize, willows and poplars on impoldered and freshwater tidal marshes in the Scheldt estuary

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Originele taal-2Engels
TijdschriftSoil use and management
Tijschrift nummer1
Pagina's (van-tot)52-61
Aantal pagina's10
StatusGepubliceerd - 2006

Bibliografische nota

Publication Authorstring : Vandecasteele, B.; Buysse, C.A.; Tack, F.M.G.
Publication RefStringPartII : <i>Soil use and management 22(1)</i>: 52-61. <a href="" target="_blank"></a>


Foliar Cd and Zn concentrations in Salix, Populus and Zea mays grown on freshwater tidal marshes were assessed. Soil metal concentrations were elevated, averaging 9.7 mg Cd kg-1 dry soil, 1100 mg Zn kg-1 dry soil and 152 mg Cr kg-1 dry soil. Cd (1.1-13.7 mg kg-1) and Zn (192-1140 mg kg-1) concentrations in willows and poplars were markedly higher than in maize on impoldered tidal marshes (0.8-4.8 mg Cd kg-1 and 155-255 mg Zn kg-1). Foliar samples of maize were collected on 90 plots on alluvial and sediment-derived soils with variable degree of soil pollution. For soil Cd concentrations exceeding 7 mg Cd kg-1 dry soil, there was a 50% probability that maize leaf concentrations exceeded public health standards for animal fodder. It was shown that analysis of foliar samples of maize taken in August can be used to predict foliar metal concentrations at harvest. These findings can therefore contribute to anticipating potential hazards arising from maize cultivation on soils with elevated metal contents.
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