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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: ARCHIVES OF AGRONOMY AND SOIL SCIENCE; v. 66, n. 12 NOV 2019.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 16/17683-1 - Assessing biochar and hidrochar's ability to reduce bioavailability of herbicides and metabolites in soils
Grantee:Kassio Ferreira Mendes
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/24799-9 - Quantification of fate and retention process of glyphosate in contrasting texture soils aged with biochar
Grantee:Cássio de Souza Almeida
Support Opportunities: Scholarships in Brazil - Scientific Initiation