Using rhizosphere biogeochemistry to increase understanding of heavy metal bioavailability

Reichman, S 2010, 'Using rhizosphere biogeochemistry to increase understanding of heavy metal bioavailability', in Robert Gilkes, Nattaporn Prakongkep (ed.) Proceedings of the 19th World Congress of Soil Science, Brisbane, Australia, August 1-6, 2010, pp. 104-107.


Document type: Conference Paper
Collection: Conference Papers

Title Using rhizosphere biogeochemistry to increase understanding of heavy metal bioavailability
Author(s) Reichman, S
Year 2010
Conference name Proceedings of the 19th World Congress of Soil Science
Conference location Brisbane, Australia
Conference dates August 1-6, 2010
Proceedings title Proceedings of the 19th World Congress of Soil Science
Editor(s) Robert Gilkes, Nattaporn Prakongkep
Publisher University of Western Australia
Place of publication Brisbane, Australia
Start page 104
End page 107
Total pages 4
Abstract A greater understanding of rhizosphere biogeochemistry is likely to improve our understanding of the factors that drive bioavailability of heavy metals in growth substrates. A glasshouse study was conducted that investigated the impacts of three growth substrates (topsoil, oxidised mining waste and unoxidised mining waste) and four species of New Zealand trees on the rhizosphere concentrations of arsenic, copper and zinc. In many of the substrate by species treatments the concentration of heavy metals was lower in the rhizosphere than in the bulk substrate. In addition, for a given plant species, where rhizosphere concentrations were significantly different to the bulk concentration, the rhizosphere concentration correlated better with plant shoot concentrations (i.e. bioavailability) than they bulk concentrations of heavy metals. In particular, the rhizosphere concentrations were good predictors of plant copper concentrations.
Subjects Environmental Rehabilitation (excl. Bioremediation)
Soil Chemistry (excl. Carbon Sequestration Science)
Plant Biology not elsewhere classified
Keyword(s) Rhizosphere
mine rehabilitation
heavy metals
plant nutrition
soil formation
Copyright notice © 2010 The Authors
ISBN 9780646537832
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