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Effects of three biochars on copper immobilization and soil microbial communities in a metal-contaminated soil using a metallophyte and two agricultural plants.
Meier, Sebastián; Moore, Francisca; González, María-Eugenia; Medina, Jorge; Campos, Pedro; Khan, Naser; Cumming, Jonathan; Sanhueza, Mario; Mejías, Jaime; Morales, Arturo; Hirzel, Juan; Seguel, Alex.
Afiliação
  • Meier S; Instituto de Investigaciones Agropecuarias, INIA Carillanca, Casilla Postal 58-D, Temuco, Chile.
  • Moore F; Instituto de Investigaciones Agropecuarias, INIA Carillanca, Casilla Postal 58-D, Temuco, Chile.
  • González ME; Scientific and Technological Bioresource Nucleus, BIOREN-UFRO, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
  • Medina J; Scientific and Technological Bioresource Nucleus, BIOREN-UFRO, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
  • Campos P; Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
  • Khan N; Scientific and Technological Bioresource Nucleus, BIOREN-UFRO, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
  • Cumming J; Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
  • Sanhueza M; NBERC, School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA, 5095, Australia.
  • Mejías J; Department of Biology, West Virginia University, Morgantown, WV, 26501, USA.
  • Morales A; Pharmacy Faculty, Universidad de Concepción, Concepción, Chile.
  • Hirzel J; Instituto de Investigaciones Agropecuarias, INIA Carillanca, Casilla Postal 58-D, Temuco, Chile.
  • Seguel A; Instituto de Investigaciones Agropecuarias, INIA Carillanca, Casilla Postal 58-D, Temuco, Chile.
Environ Geochem Health ; 43(4): 1441-1456, 2021 Apr.
Article em En | MEDLINE | ID: mdl-31599372
Biochar (BC) is a porous, carbonaceous material produced by slow pyrolysis of biomass under oxygen-limited conditions. BC production has been attracting research interest because it modifies soil physicochemical characteristics and improves the growth of plants in problem soils. These benefits may be best actualized for soils contaminated by metals, where remediation is hampered by metal toxicity to both plants and soil microbial communities. The objectives of this study were to evaluate the impact of the addition of chicken manure biochar (CMB), oat hull biochar (OHB), or pine bark biochar (PBB) on copper (Cu) bioavailability in a Cu-contaminated soil, the effectiveness of these BCs promoting plant growth, and its effects on soil microbial communities supporting these plants. A sandy soil (338 mg Cu kg-1) was amended with CMB, OHB, and PBB, and the metallophyte Oenothera picensis or the agricultural species Solanum lycopersicum and Lolium perenne were grown for 3 months. The BCs produced an increase in soil pH, reduced the exchangeable Cu, and increased Cu bound to organic matter and residual fractions. All BCs enhanced the quality of contaminated soil and increased the plant biomass production, notably for S. lycopersicum, which grew until 12 times more than plants in non-amended soil. While BC addition reduced the concentration of Cu in soil pore water, the amendment did not reduce the concentrations of Cu in shoot tissues. BC additions also stimulated soil microorganisms, increasing basal respiration and DHA activity and modifying microbial communities, especially in soils supporting L. perenne. These results indicate that BCs represent an effective tool to remediate Cu-contaminated sandy soils.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Limite: Animals País/Região como assunto: America do sul / Chile Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Limite: Animals País/Região como assunto: America do sul / Chile Idioma: En Ano de publicação: 2021 Tipo de documento: Article