Your browser doesn't support javascript.
loading
Biochar decreases dissolved organic carbon but not nitrate leaching in relation to vinasse application in a Brazilian sugarcane soil.
Eykelbosh, Angela Joy; Johnson, Mark S; Couto, Eduardo Guimarães.
Afiliação
  • Eykelbosh AJ; Institute for Resources, Environment, and Sustainability, 2202 Main Mall, University of British Columbia, Vancouver V6T 1Z4, Canada. Electronic address: a.eykelbosh@alumni.ubc.ca.
  • Johnson MS; Institute for Resources, Environment, and Sustainability, 2202 Main Mall, University of British Columbia, Vancouver V6T 1Z4, Canada; Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver V6T 1Z4, Canada. Electronic address: mark.johnson@ubc.ca.
  • Couto EG; Universidade Federal de Mato Grosso, Fernando Corrêa da Costa, Boa Esperança, Cuiabá, Mato Grosso 78060-900, Brazil. Electronic address: couto@ufmt.br.
J Environ Manage ; 149: 9-16, 2015 Feb 01.
Article em En | MEDLINE | ID: mdl-25463566
OBJECTIVES: Sugarcane cultivation is associated with catchment-wide impacts related to application of vinasse, a nutrient-dense effluent with high eutrophication potential. We evaluated the potential for biochar (charcoal produced from pyrolyzed filtercake) to mitigate carbon and nutrient leaching in a cultivated Brazilian Ferralsol after vinasse application. METHODS: Twelve soil columns (soil alone [S], soil with vinasse [SV], soil with vinasse and biochar [SVB], and soil with biochar [SB]) were flushed with water and then treated with water or vinasse. Samples collected via vacuum filtration were examined via UV-Vis and fluorescence spectroscopy. RESULTS: Biochar attenuated dissolved organic carbon (DOC) leaching in soil (S vs. SB) as well as in relation to vinasse application (SV vs. SVB). Biochar-amended soil preferentially retained high-molecular weight, humic-like DOC species, as revealed by fluorescence spectroscopy and optical indices, but did not retain low-weight amino acid-like species. Vinasse application also increased total NO3(-) flux, which may have been exacerbated by biochar co-application. CONCLUSIONS: Vinasse treatment strongly affects carbon and NO3(-) fluxes in this tropical soil. Biochar attenuated DOC leaching, likely through stabilization of complex compounds already present in soil, but did not lessen NO3(-) fluxes. Thus, biochar amendments in vinasse application areas may decrease carbon leaching.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Solo / Poluentes do Solo / Resíduos / Carbono / Carvão Vegetal / Saccharum / Agricultura / Nitratos País/Região como assunto: America do sul / Brasil Idioma: En Revista: J Environ Manage Ano de publicação: 2015 Tipo de documento: Article País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Solo / Poluentes do Solo / Resíduos / Carbono / Carvão Vegetal / Saccharum / Agricultura / Nitratos País/Região como assunto: America do sul / Brasil Idioma: En Revista: J Environ Manage Ano de publicação: 2015 Tipo de documento: Article País de publicação: Reino Unido