Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation

Autores
Bongiovanni, Marcos D.; Lobartini, Juan Carlos
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cultivation is known to strongly affect not only soil structure but also organic substances responsible for aggregation. This research was conducted to study the effect of cultivation on the distribution of soil macro- and microaggregates as related to changes in soil organic matter content in a Typic Haplustoll, located in central Cordoba, the principal peanut (Arachis hypogaea L.) growing area of Argentina. Samples were taken from A or Ap horizons at (1) an undisturbed and (2) a cultivated site for determination of the aggregate fractions by the wet sieving method. The mineral associated organic carbon (MOC) and particulate organic carbon (POC), in soils and their aggregates, were separated by dispersion and sieving procedures. Carbohydrate content in soil and in aggregate fractions was determined by dilute acid (CHda) and hot water (CHhw) extraction, whereas humic (HA) and fulvic acid (FA) were extracted by the NaOH method. The results indicated that the total macroaggregates (> 250 μm) content was 1.7 times lower in the cultivated than in the undisturbed soil. The large macroaggregates (2800-2000 μm) were the most affected, decreasing a 92% due to cultivation compared with undisturbed. In contrast, the microaggregate (250-53 μm) content was twice that high in the cultivated than in the undisturbed soil. The concentrations of OC, POC, CHda, CHhw were all reduced substantially by cultivation, with the microaggregates showing an almost complete loss of its POC content. The destruction of these transient organic cementing agents was assumed to have contributed to the collapse of the macroaggregates. This has resulted in exposure of POC, making it more available to rapid oxidation and microbial attack. There were indications suggesting POC and CHhw contents to be valuable as indicators of soil structure degradation due to exhaustive cultivation practices. Although it is well know that humic substances are chemically and structurally much more stable than nonhumic substances but our results showed a surprising decrease humic substances under continuous cultivation.
Fil: Bongiovanni, Marcos D.. Universidad Nacional de Río Cuarto; Argentina
Fil: Lobartini, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Materia
AGGREGATES
CULTIVATION
HUMIC SUBSTANCES
ORGANIC MATTER
SOIL DEGRADATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/94242
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/94242
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network_name_str CONICET Digital (CONICET)
spelling Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivationBongiovanni, Marcos D.Lobartini, Juan CarlosAGGREGATESCULTIVATIONHUMIC SUBSTANCESORGANIC MATTERSOIL DEGRADATIONhttps://purl.org/becyt/ford/4.5https://purl.org/becyt/ford/4Cultivation is known to strongly affect not only soil structure but also organic substances responsible for aggregation. This research was conducted to study the effect of cultivation on the distribution of soil macro- and microaggregates as related to changes in soil organic matter content in a Typic Haplustoll, located in central Cordoba, the principal peanut (Arachis hypogaea L.) growing area of Argentina. Samples were taken from A or Ap horizons at (1) an undisturbed and (2) a cultivated site for determination of the aggregate fractions by the wet sieving method. The mineral associated organic carbon (MOC) and particulate organic carbon (POC), in soils and their aggregates, were separated by dispersion and sieving procedures. Carbohydrate content in soil and in aggregate fractions was determined by dilute acid (CHda) and hot water (CHhw) extraction, whereas humic (HA) and fulvic acid (FA) were extracted by the NaOH method. The results indicated that the total macroaggregates (> 250 μm) content was 1.7 times lower in the cultivated than in the undisturbed soil. The large macroaggregates (2800-2000 μm) were the most affected, decreasing a 92% due to cultivation compared with undisturbed. In contrast, the microaggregate (250-53 μm) content was twice that high in the cultivated than in the undisturbed soil. The concentrations of OC, POC, CHda, CHhw were all reduced substantially by cultivation, with the microaggregates showing an almost complete loss of its POC content. The destruction of these transient organic cementing agents was assumed to have contributed to the collapse of the macroaggregates. This has resulted in exposure of POC, making it more available to rapid oxidation and microbial attack. There were indications suggesting POC and CHhw contents to be valuable as indicators of soil structure degradation due to exhaustive cultivation practices. Although it is well know that humic substances are chemically and structurally much more stable than nonhumic substances but our results showed a surprising decrease humic substances under continuous cultivation.Fil: Bongiovanni, Marcos D.. Universidad Nacional de Río Cuarto; ArgentinaFil: Lobartini, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaElsevier Science2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94242Bongiovanni, Marcos D.; Lobartini, Juan Carlos; Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation; Elsevier Science; Geoderma; 136; 3-4; 12-2006; 660-6650016-7061CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706106001613info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2006.05.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:54Zoai:ri.conicet.gov.ar:11336/94242instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:55.108CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
title Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
spellingShingle Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
Bongiovanni, Marcos D.
AGGREGATES
CULTIVATION
HUMIC SUBSTANCES
ORGANIC MATTER
SOIL DEGRADATION
title_short Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
title_full Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
title_fullStr Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
title_full_unstemmed Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
title_sort Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
dc.creator.none.fl_str_mv Bongiovanni, Marcos D.
Lobartini, Juan Carlos
author Bongiovanni, Marcos D.
author_facet Bongiovanni, Marcos D.
Lobartini, Juan Carlos
author_role author
author2 Lobartini, Juan Carlos
author2_role author
dc.subject.none.fl_str_mv AGGREGATES
CULTIVATION
HUMIC SUBSTANCES
ORGANIC MATTER
SOIL DEGRADATION
topic AGGREGATES
CULTIVATION
HUMIC SUBSTANCES
ORGANIC MATTER
SOIL DEGRADATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.5
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Cultivation is known to strongly affect not only soil structure but also organic substances responsible for aggregation. This research was conducted to study the effect of cultivation on the distribution of soil macro- and microaggregates as related to changes in soil organic matter content in a Typic Haplustoll, located in central Cordoba, the principal peanut (Arachis hypogaea L.) growing area of Argentina. Samples were taken from A or Ap horizons at (1) an undisturbed and (2) a cultivated site for determination of the aggregate fractions by the wet sieving method. The mineral associated organic carbon (MOC) and particulate organic carbon (POC), in soils and their aggregates, were separated by dispersion and sieving procedures. Carbohydrate content in soil and in aggregate fractions was determined by dilute acid (CHda) and hot water (CHhw) extraction, whereas humic (HA) and fulvic acid (FA) were extracted by the NaOH method. The results indicated that the total macroaggregates (> 250 μm) content was 1.7 times lower in the cultivated than in the undisturbed soil. The large macroaggregates (2800-2000 μm) were the most affected, decreasing a 92% due to cultivation compared with undisturbed. In contrast, the microaggregate (250-53 μm) content was twice that high in the cultivated than in the undisturbed soil. The concentrations of OC, POC, CHda, CHhw were all reduced substantially by cultivation, with the microaggregates showing an almost complete loss of its POC content. The destruction of these transient organic cementing agents was assumed to have contributed to the collapse of the macroaggregates. This has resulted in exposure of POC, making it more available to rapid oxidation and microbial attack. There were indications suggesting POC and CHhw contents to be valuable as indicators of soil structure degradation due to exhaustive cultivation practices. Although it is well know that humic substances are chemically and structurally much more stable than nonhumic substances but our results showed a surprising decrease humic substances under continuous cultivation.
Fil: Bongiovanni, Marcos D.. Universidad Nacional de Río Cuarto; Argentina
Fil: Lobartini, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
description Cultivation is known to strongly affect not only soil structure but also organic substances responsible for aggregation. This research was conducted to study the effect of cultivation on the distribution of soil macro- and microaggregates as related to changes in soil organic matter content in a Typic Haplustoll, located in central Cordoba, the principal peanut (Arachis hypogaea L.) growing area of Argentina. Samples were taken from A or Ap horizons at (1) an undisturbed and (2) a cultivated site for determination of the aggregate fractions by the wet sieving method. The mineral associated organic carbon (MOC) and particulate organic carbon (POC), in soils and their aggregates, were separated by dispersion and sieving procedures. Carbohydrate content in soil and in aggregate fractions was determined by dilute acid (CHda) and hot water (CHhw) extraction, whereas humic (HA) and fulvic acid (FA) were extracted by the NaOH method. The results indicated that the total macroaggregates (> 250 μm) content was 1.7 times lower in the cultivated than in the undisturbed soil. The large macroaggregates (2800-2000 μm) were the most affected, decreasing a 92% due to cultivation compared with undisturbed. In contrast, the microaggregate (250-53 μm) content was twice that high in the cultivated than in the undisturbed soil. The concentrations of OC, POC, CHda, CHhw were all reduced substantially by cultivation, with the microaggregates showing an almost complete loss of its POC content. The destruction of these transient organic cementing agents was assumed to have contributed to the collapse of the macroaggregates. This has resulted in exposure of POC, making it more available to rapid oxidation and microbial attack. There were indications suggesting POC and CHhw contents to be valuable as indicators of soil structure degradation due to exhaustive cultivation practices. Although it is well know that humic substances are chemically and structurally much more stable than nonhumic substances but our results showed a surprising decrease humic substances under continuous cultivation.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/94242
Bongiovanni, Marcos D.; Lobartini, Juan Carlos; Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation; Elsevier Science; Geoderma; 136; 3-4; 12-2006; 660-665
0016-7061
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94242
identifier_str_mv Bongiovanni, Marcos D.; Lobartini, Juan Carlos; Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation; Elsevier Science; Geoderma; 136; 3-4; 12-2006; 660-665
0016-7061
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706106001613
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2006.05.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.885934

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