Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping

The massive adoption of no-tillage (NT), along with the simplification of the cropping sequences has led to physical and chemical degradation of soils. To recover degraded soils, cover crops have been proposed as an alternative to increase soil organic carbon (SOC) and to improve soil physical quali...

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Autores principales: Salazar Landea, María Paz, Soracco, Carlos Germán, Villarreal, Rafael, Polich, Nicolás Guillermo, Bellora, Guido Lautaro, Turinetto, Matías Javier, Lozano, Luis Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Agrarias
particulate organic carbon
humic acids
fulvic acids
saturated hydraulic conductivity
water-conducting porosity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124406
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124406
record_format dspace
spelling I19-R120-10915-1244062023-05-29T15:09:22Z http://sedici.unlp.edu.ar/handle/10915/124406 issn:1806-9657 Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping Salazar Landea, María Paz Soracco, Carlos Germán Villarreal, Rafael Polich, Nicolás Guillermo Bellora, Guido Lautaro Turinetto, Matías Javier Lozano, Luis Alberto 2020-11-25 2021-09-08T15:38:22Z en Ciencias Agrarias particulate organic carbon humic acids fulvic acids saturated hydraulic conductivity water-conducting porosity The massive adoption of no-tillage (NT), along with the simplification of the cropping sequences has led to physical and chemical degradation of soils. To recover degraded soils, cover crops have been proposed as an alternative to increase soil organic carbon (SOC) and to improve soil physical quality (SPQ). This study aimed (i) to determine the content of SOC and its physical and chemical fractions at different layers and positions, in a soil with a soybean crop under NT with and without winter cover crops, and (ii) to determine SPQ indicators in a soybean crop under NT with and without winter cover crops. Measures and samples were made on a field experiment in a typical Argiudoll of the Argentinean Pampas. Soil organic carbon, coarse and fine particulate organic carbon (POCc and POCf), mineral associated organic carbon (MOC), fulvic acids (FA), humic acids (HA), and humins (H) were determined. Soil physical quality indicators determined were: soil bulk density and total porosity from field samples, and saturated hydraulic conductivity, water-conducting macro and mesoporosity, and total porosity connectivity from field water infiltration data. After eight years, cover crops did not cause any observable change in whole SOC content, but significant differences were observed for some SOC fractions. Humic acids and POCc had 40 and 25 % increases, respectively, in the cover crop treatment. Mineral associated organic carbon and H decreased by 9 and 7 % in cover crop treatment. Soil physical quality did not improve after eight years of cover crops. This can be related to degradation processes after 20 years of soybean monoculture under NT, and to the low ability of Argiudolls to recover from physical degradation. Facultad de Ciencias Agrarias y Forestales Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
particulate organic carbon
humic acids
fulvic acids
saturated hydraulic conductivity
water-conducting porosity
spellingShingle Ciencias Agrarias
particulate organic carbon
humic acids
fulvic acids
saturated hydraulic conductivity
water-conducting porosity
Salazar Landea, María Paz
Soracco, Carlos Germán
Villarreal, Rafael
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Turinetto, Matías Javier
Lozano, Luis Alberto
Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
topic_facet Ciencias Agrarias
particulate organic carbon
humic acids
fulvic acids
saturated hydraulic conductivity
water-conducting porosity
description The massive adoption of no-tillage (NT), along with the simplification of the cropping sequences has led to physical and chemical degradation of soils. To recover degraded soils, cover crops have been proposed as an alternative to increase soil organic carbon (SOC) and to improve soil physical quality (SPQ). This study aimed (i) to determine the content of SOC and its physical and chemical fractions at different layers and positions, in a soil with a soybean crop under NT with and without winter cover crops, and (ii) to determine SPQ indicators in a soybean crop under NT with and without winter cover crops. Measures and samples were made on a field experiment in a typical Argiudoll of the Argentinean Pampas. Soil organic carbon, coarse and fine particulate organic carbon (POCc and POCf), mineral associated organic carbon (MOC), fulvic acids (FA), humic acids (HA), and humins (H) were determined. Soil physical quality indicators determined were: soil bulk density and total porosity from field samples, and saturated hydraulic conductivity, water-conducting macro and mesoporosity, and total porosity connectivity from field water infiltration data. After eight years, cover crops did not cause any observable change in whole SOC content, but significant differences were observed for some SOC fractions. Humic acids and POCc had 40 and 25 % increases, respectively, in the cover crop treatment. Mineral associated organic carbon and H decreased by 9 and 7 % in cover crop treatment. Soil physical quality did not improve after eight years of cover crops. This can be related to degradation processes after 20 years of soybean monoculture under NT, and to the low ability of Argiudolls to recover from physical degradation.
format Articulo
Articulo
author Salazar Landea, María Paz
Soracco, Carlos Germán
Villarreal, Rafael
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Turinetto, Matías Javier
Lozano, Luis Alberto
author_facet Salazar Landea, María Paz
Soracco, Carlos Germán
Villarreal, Rafael
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Turinetto, Matías Javier
Lozano, Luis Alberto
author_sort Salazar Landea, María Paz
title Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
title_short Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
title_full Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
title_fullStr Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
title_full_unstemmed Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping
title_sort winter cover crops effects on soil organic carbon and soil physical quality in a typical argiudoll under continuous soybean cropping
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/124406
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