Lime and compost promote plant re-colonization of metal-polluted, acidic soils
Language
en
Article de revue
This item was published in
International Journal of Phytoremediation. 2012, vol. 14, n° 8, p. 820-833
Taylor & Francis
English Abstract
The revegetation of soils affected by historic depositions of an industrial complex in Central Chile was studied. The plant re-colonization from the existing soil seed bank and changes in the physico-chemical properties ...Read more >
The revegetation of soils affected by historic depositions of an industrial complex in Central Chile was studied. The plant re-colonization from the existing soil seed bank and changes in the physico-chemical properties of the soil were evaluated in field plots amended with lime and/or compost. We found that the application of lime and/or compost decreased the Cu2+ ion activity in the soil solution and the exchangeable Cu in the soil, showing an effective Cu immobilization in the topsoil. Whereas lime application had no effect on plant productivity in comparison with the unamended control, the application of compost and lime+compost increased the plant cover and aboveground biomass due to the higher nutrient availability and water-holding capacity of the compost-amended soils. Although the Cu2+ activity and the exchangeable Cu were markedly lower in the amended soils than in the unamended control, the shoot Cu concentrations of Lolium spp. and Eschscholzia californica did not differ between the treatments.Read less <
Keywords
Ventanas industrial complex
English Keywords
metal toxicity
bioavailability
phytostabilization
in situ immobilization
Puchuncavi Valley
Origin
Hal imported