부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.apsoil.2009.01.001 Byline: J. Ascher (a), M.T. Ceccherini (a), L. Landi (a), M. Mench (b), G. Pietramellara (a), P. Nannipieri (a), G. Renella (a) Keywords: Soil biochemical activity; Coal fly ash; Soil microbial diversity; Soil remediation; Zerovalent iron grit Abstract: 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(NO.sub.3).sub.2.sup.- 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 qCO.sub.2. 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. Author Affiliation: (a) Department of Soil Science and Plant Nutrition, University of Florence, P.le delle Cascine 28, I-50144 Florence, Italy (b) UMR BIOGECO INRA 1202, Ecologie des Communautes, Universite Bordeaux 1, Bat. B8, RdC Est, avenue des Facultes, F-33405 Talence, France Article History: Received 19 July 2008; Revised 7 January 2009; Accepted 8 January 2009