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Biochar and compost amendments enhance copper immobilisation and support plant growth in contaminated soils

pmid: 26850677
Biochar and compost amendments enhance copper immobilisation and support plant growth in contaminated soils
Contamination of soil with trace elements, such as Cu, is an important risk management issue. A pot experiment was conducted to determine the effects of three biochars and compost on plant growth and the immobilisation of Cu in a contaminated soil from a site formerly used for wood preservation. To assess Cu mobility, amended soils were analysed using leaching tests pre- and post-incubation, and post-growth. Amended and unamended soils were planted with sunflower, and the resulting plant material was assessed for yield and Cu concentration. All amendments significantly reduced leachable Cu compared to the unamended soil, however, the greatest reductions in leachable Cu were associated with the higher biochar application rate. The greatest improvements in plant yields were obtained with the higher application rate of biochar in combination with compost. The results suggest joint biochar and compost amendment reduces Cu mobility and can support biomass production on Cu-contaminated soils.
plant trials, sunflower, [SDV]Life Sciences [q-bio], trace elements, 630, 333, Soil, leaching tests, Soil Pollutants, Biomass, Plant trials, In situ stabilisation, in situ stabilisation, Organic amendments, Trace elements, Leaching tests, Wood, Trace Elements, [SDV] Life Sciences [q-bio], Sunflower, organic amendments, Charcoal, Helianthus, Copper
plant trials, sunflower, [SDV]Life Sciences [q-bio], trace elements, 630, 333, Soil, leaching tests, Soil Pollutants, Biomass, Plant trials, In situ stabilisation, in situ stabilisation, Organic amendments, Trace elements, Leaching tests, Wood, Trace Elements, [SDV] Life Sciences [q-bio], Sunflower, organic amendments, Charcoal, Helianthus, Copper
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