Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season

Glyphosate (GLY) is a non-selective herbicide, heavily used world-wide in agriculture, especially under no-tillage (NT) management. The objectives of this work were i - to determine the temporal and vertical variation of GLY and its main metabolite (AMPA) levels during the soybean cycle in a soil un...

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Autores principales: Soracco, Carlos Germán, Villarreal, Rafael, Lozano, Luis Alberto, Vittori, Santiago, Melani, Esteban Miguel, Marino, Damián José Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Química
Hydraulic conductivity
Solute transport
Pesticide fate
Soil porosity
Glyphosate accumulation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/153778
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-153778
record_format dspace
spelling I19-R120-10915-1537782023-06-01T04:06:35Z http://sedici.unlp.edu.ar/handle/10915/153778 issn:0016-7061 Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season Soracco, Carlos Germán Villarreal, Rafael Lozano, Luis Alberto Vittori, Santiago Melani, Esteban Miguel Marino, Damián José Gabriel 2018 2023-05-31T18:41:26Z en Química Hydraulic conductivity Solute transport Pesticide fate Soil porosity Glyphosate accumulation Glyphosate (GLY) is a non-selective herbicide, heavily used world-wide in agriculture, especially under no-tillage (NT) management. The objectives of this work were i - to determine the temporal and vertical variation of GLY and its main metabolite (AMPA) levels during the soybean cycle in a soil under NT and conventional tillage (CT); ii - to determine the relationship of GLY and AMPA levels variation with different soil properties; and iii - to compare initial and final GLY and AMPA levels in the soil during a crop cycle to infer possible accumulation. GLY and AMPA contents were determined in the A horizon (0–40 cm) of a loam soil from Argentinian Pampas Region, in different dates during soybean crop cycle. Soil physical and chemical properties were also determined. GLY and AMPA were detected in all sampling dates in both treatments (GLY and AMPA contents in the soil ranged between 5.7 and 98.5 μg·kg−1; and 6.6 and 1686.0 μg·kg−1, respectively). GLY was strongly retained in the top soil in most of the sampling dates for both treatments (> 80% of total GLY was found in the topsoil - 20 cm). CT treatment showed higher GLY temporal variation, favored by higher values of saturated hydraulic conductivity (K0), total macroporosity (θma) and effective macroporosity (εma), especially when strong precipitation occurred near the application. GLY vertical transport under NT seemed to be limited by low values of K0, θma, and εma. The temporal variation of GLY vertical transport was explained by the temporal variation of the studied soil physical and hydraulic properties. Total extracted GLY accumulated, with an increment between the last and the first sampling date of 54% and 82% during the crop cycle for NT and CT, respectively. Facultad de Ciencias Agrarias y Forestales Centro de Investigaciones del Medioambiente Consejo Nacional de Investigaciones Científicas y Técnicas Instituto Nacional de Tecnología Agropecuaria Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 13-21
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Hydraulic conductivity
Solute transport
Pesticide fate
Soil porosity
Glyphosate accumulation
spellingShingle Química
Hydraulic conductivity
Solute transport
Pesticide fate
Soil porosity
Glyphosate accumulation
Soracco, Carlos Germán
Villarreal, Rafael
Lozano, Luis Alberto
Vittori, Santiago
Melani, Esteban Miguel
Marino, Damián José Gabriel
Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
topic_facet Química
Hydraulic conductivity
Solute transport
Pesticide fate
Soil porosity
Glyphosate accumulation
description Glyphosate (GLY) is a non-selective herbicide, heavily used world-wide in agriculture, especially under no-tillage (NT) management. The objectives of this work were i - to determine the temporal and vertical variation of GLY and its main metabolite (AMPA) levels during the soybean cycle in a soil under NT and conventional tillage (CT); ii - to determine the relationship of GLY and AMPA levels variation with different soil properties; and iii - to compare initial and final GLY and AMPA levels in the soil during a crop cycle to infer possible accumulation. GLY and AMPA contents were determined in the A horizon (0–40 cm) of a loam soil from Argentinian Pampas Region, in different dates during soybean crop cycle. Soil physical and chemical properties were also determined. GLY and AMPA were detected in all sampling dates in both treatments (GLY and AMPA contents in the soil ranged between 5.7 and 98.5 μg·kg−1; and 6.6 and 1686.0 μg·kg−1, respectively). GLY was strongly retained in the top soil in most of the sampling dates for both treatments (> 80% of total GLY was found in the topsoil - 20 cm). CT treatment showed higher GLY temporal variation, favored by higher values of saturated hydraulic conductivity (K0), total macroporosity (θma) and effective macroporosity (εma), especially when strong precipitation occurred near the application. GLY vertical transport under NT seemed to be limited by low values of K0, θma, and εma. The temporal variation of GLY vertical transport was explained by the temporal variation of the studied soil physical and hydraulic properties. Total extracted GLY accumulated, with an increment between the last and the first sampling date of 54% and 82% during the crop cycle for NT and CT, respectively.
format Articulo
Articulo
author Soracco, Carlos Germán
Villarreal, Rafael
Lozano, Luis Alberto
Vittori, Santiago
Melani, Esteban Miguel
Marino, Damián José Gabriel
author_facet Soracco, Carlos Germán
Villarreal, Rafael
Lozano, Luis Alberto
Vittori, Santiago
Melani, Esteban Miguel
Marino, Damián José Gabriel
author_sort Soracco, Carlos Germán
title Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
title_short Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
title_full Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
title_fullStr Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
title_full_unstemmed Glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
title_sort glyphosate dynamics in a soil under conventional and no-till systems during a soybean growing season
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/153778
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