ASCHER, Judith; CECCHERINI, M. T.; LANDI, L.; MENCH, Michel; PIETRAMELLARA, G.; NANNIPIERI, P.; RENELLA, G.

doi:10.1016/j.apsoil.2009.01.001

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ASCHER, Judith
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

CECCHERINI, M. T.
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

LANDI, L.
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

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Ce document a été publié dans

Applied Soil Ecology. 2009, vol. 41, n° 3, p. 351-359

Elsevier

Résumé en anglais

Beringite (B) and zerovalent iron grit (Z), singly and in combination (BZ), were added to a loamy sand soil contaminated by trace elements (Reppel, Belgium), mainly by arsenic (As), to reduce As labile fractions and phytoavailability. An uncontaminated sandy soil was studied for comparison. Soils were placed in large lysimeters cultivated with maize and vegetables for 6 years. pH, organic C and total N content increased in amended soils. The Z and BZ treatments reduced the Ca(NO3)2− extractable soil As and As uptake by lettuce. The BZ lettuces had also the lowest foliar Pb, Cd, Zn, and Mn concentrations. All amendments had positive effects on the soil microbial biomass and reduced the qCO2. Glucose mineralization was increased in Z and BZ amended soils. Acid phosphomonoesterase activity was higher in the untreated soil than in the other soils; the alkaline phosphomonoesterase, phosphodiesterase and protease activities were increased by Z and BZ treatments, whereas B amendment had less positive effects. Genetic fingerprinting using Denaturing Gradient Gel Electrophoresis (DGGE) revealed shifts in the composition of eubacterial and fungal communities of the amended soils. Microbial species richness decreased rather than increased in the treated soils, regardless of reduced trace element availability and increased soil microbial biomass and activity.< Réduire

Mots clés

SOIL MICROBIAL DIVERSITY

CENDRE DE HOUILLE

DIVERSITÉ MICROBIENNEL

ÉLECTROPHORÈSE SUR GEL EN GRADIENT DÉNATURANT

Mots clés en anglais

SOIL BIOCHEMICAL ACTIVITY

COAL FLY ASH

SOIL REMEDIATION

ZEROVALENT IRON GRIT