Sorption-desorption isotherms and biodegradation of glyphosate in two tropical soils aged with eucalyptus biochar

Autor(es)

Junqueira, Leonardo Vilela ^[1] ; Mendes, Kassio Ferreira ^[2] ; de Sousa, Rodrigo Nogueira ^[3] ; Almeida, Cassio de Souza ^[1] ; Alonso, Felipe Gimenes ^[1] ; Tornisielo, Valdemar Luiz ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Piracicaba - Brazil

^[2] Univ Fed Vicosa, Dept Agron, Vicosa, MG - Brazil

^[3] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ARCHIVES OF AGRONOMY AND SOIL SCIENCE; v. 66, n. 12 NOV 2019.
• Citações Web of Science: 1

Resumo

The objective of this study was to evaluate the sorption-desorption process and biodegradation of glyphosate in two tropical soils aged with biochar derived from eucalyptus. The biochar aging period was 30 d. There was little difference between the amounts of sorbed glyphosate in Ultisol (96.8, 96.8 and 96.4%) and Alfisol (97.1, 97.5 and 97.4%) soils that were unamended or amended with biochar aged for 0 or 30 d, respectively. Similar amounts of desorbed herbicide occurred in Ultisol (3.3, 3.3 and 3.4%) and Alfisol (4.1, 4.2 and 3.9%) soils, respectively. The degradation time half-life (DT50) of glyphosate in Ultisol unamended and initial amended were higher (38 and 36 d, respectively) than DT50 in the amended soil with 30 d of biochar aging (27 d); and in the Alfisol DT50 was higher in unamended soil (38 d), and similar in soil unamended at 0 and 30 d of biochar aging (21 and 26 d, respectively). The addition of biochar to two tropical soils or its aging did not have any effect on the sorption and desorption of glyphosate and its biodegradation in relation to the unamended soils, and it can did not affect the transport and persistence of this herbicide in soil. (AU)

• Processo FAPESP: 16/17683-1 - Efeito do biochar e hidrochar na capacidade de reduzir a biodisponibilidade de herbicidas e metabólitos em solos
• Beneficiário: Kassio Ferreira Mendes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/24799-9 - Quantificação do destino e processo de retenção do glyphosate em solos de textura contrastante envelhecidos com biochar
• Beneficiário: Cássio de Souza Almeida
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica