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Article

Dolomite and Compost Amendments Enhance Cu Phytostabilization and Increase Microbiota of the Leachates from a Cu-Contaminated Soil

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Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Piazzale delle Cascine 18, 50144 Florence, Italy
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Instituto do Petróleo e dos Recursos Naturais (IPR), Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga 6681, Predio 96J, Porto Alegre 90619-900, Brazil
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Programa de Pós-Graduação em Engenharia Ambiental (PPGEA), Universidade Regional de Blumenau (FURB), Rua Sao Paulo, 3250, Blumenau 89030-000, Brazil
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Centro de Tecnologia, Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Santa Maria (UFSM), Santa Maria 97105-900, Brazil
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Institute of Food and Agricultural Sciences, Department of Microbiology and Cell Science, University of Florida (UF), Gainesville, FL 32611-0180, USA
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University of Bordeaux, INRAE, BIOGECO (Biodiversity, Genes and Communities), F-33615 Pessac, France
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Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padua, Viale dell’Università 16, 35020 Legnaro, Italy
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(5), 719; https://doi.org/10.3390/agronomy10050719
Received: 1 April 2020 / Revised: 28 April 2020 / Accepted: 5 May 2020 / Published: 18 May 2020
(This article belongs to the Special Issue Agronomic Approaches for Remediation of Contaminated Soils)
The chemical properties, ecotoxicity, and microbiome of leachates from phytomanaged Cu-contaminated soils were analyzed. The phytomanagement was carried out using Cu-tolerant poplar Populus trichocarpa × deltoides cv. Beaupré and black bent Agrostis gigantea L., aided by soil amendments, i.e., dolomitic limestone (DL) and compost (OM), alone and in combination (OMDL). Plants plus either DL or OMDL amendments reduced in leachates the electrical conductivity, the Cu concentration, and the concentration of total organic C except for the OMDL treatment, and decreased leachate toxicity towards bacteria. Total N concentration increased in the OM leachates. The aided phytostabilization increased the culturable bacteria numbers and the proportion of Cu-resistant bacteria in the leachates, as compared to the leachate from the untreated soil. Phytomanagement also enriched the microbial communities of the leachates with plant beneficial bacteria. Overall, the Cu stabilization and phytomanagement induced positive changes in the microbial communities of the soil leachates. View Full-Text
Keywords: metal polluted soil; soil leachate; aided phytostabilization; soil toxicity; bacterial Cu-resistance; microbial diversity metal polluted soil; soil leachate; aided phytostabilization; soil toxicity; bacterial Cu-resistance; microbial diversity
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MDPI and ACS Style

Giagnoni, L.; dos Anjos Borges, L.G.; Giongo, A.; de Oliveira Silveira, A.; Ardissone, A.N.; Triplett, E.W.; Mench, M.; Renella, G. Dolomite and Compost Amendments Enhance Cu Phytostabilization and Increase Microbiota of the Leachates from a Cu-Contaminated Soil. Agronomy 2020, 10, 719. https://doi.org/10.3390/agronomy10050719

AMA Style

Giagnoni L, dos Anjos Borges LG, Giongo A, de Oliveira Silveira A, Ardissone AN, Triplett EW, Mench M, Renella G. Dolomite and Compost Amendments Enhance Cu Phytostabilization and Increase Microbiota of the Leachates from a Cu-Contaminated Soil. Agronomy. 2020; 10(5):719. https://doi.org/10.3390/agronomy10050719

Chicago/Turabian Style

Giagnoni, Laura, Luiz G. dos Anjos Borges, Adriana Giongo, Andressa de Oliveira Silveira, Alexandria N. Ardissone, Eric W. Triplett, Michel Mench, and Giancarlo Renella. 2020. "Dolomite and Compost Amendments Enhance Cu Phytostabilization and Increase Microbiota of the Leachates from a Cu-Contaminated Soil" Agronomy 10, no. 5: 719. https://doi.org/10.3390/agronomy10050719

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