Abstract
Laboratory-based relationships that model the phytotoxicity of metals using soil properties have been developed. This paper presents the first field-based phytotoxicity relationships. Wheat (Triticum aestivum L.) was grown at 11 Australian field sites at which soil was spiked with copper (Cu) and zinc (Zn) salts. Toxicity was measured as inhibition of plant growth at 8 weeks and grain yield at harvest. The added Cu and Zn EC10 values for both endpoints ranged from approximately 3 to 4760 mg/kg. There were no relationships between field-based 8-week biomass and grain yield toxicity values for either metal. Cu toxicity was best modelled using pH and organic carbon content while Zn toxicity was best modelled using pH and the cation exchange capacity. The best relationships estimated toxicity within a factor of two of measured values. Laboratory-based phytotoxicity relationships could not accurately predict field-based phytotoxicity responses. Crown
Original language | English |
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Pages (from-to) | 707-714 |
Number of pages | 8 |
Journal | Environmental Pollution |
Volume | 156 |
Issue number | 3 |
Early online date | 24 Jul 2008 |
DOIs | |
Publication status | Published - 1 Dec 2008 |
Externally published | Yes |
Keywords
- Copper
- Phytotoxicity
- Soil properties
- Wheat
- Zinc
ASJC Scopus subject areas
- Toxicology
- Pollution
- Health, Toxicology and Mutagenesis