Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level

Autores
Wingeyer, Ana Beatriz
Año de publicación
2011
Idioma
inglés
Tipo de recurso
tesis doctoral
Estado
versión publicada
Colaborador/a o director/a de tesis
Drijbe, Rhae
Olk, Daniel
Descripción
Tesis para obtener el grado de Doctor of Philosophy, Major: Agronomy, de la University of Nebraska, en 2011
This dissertation explores changes over time in soil organic matter (SOM) stabilization of two irrigated production fields: a continuous maize sequence that was converted from no-till to conservation deep tillage (Site 1), and a no-till maize-soybean rotation (Site 2). An integrated approach using humic acid extractions and density-based physical fractionation of SOM within aggregate size classes was developed to evaluate the changes in SOM stabilization (physical protection, organo-mineral associations and humification). At Site 1, loss of SOM in the surface layer was compensated for by increased SOM in deeper soil layers with no net change in C stocks. Whole field C-stocks in the 0-400 kg soil m-2 layer of Site 1 were 7.09 ± 0.29, 7.47 ± 0.36, 7.15 ± 0.37 and 7.18 ± 0.41 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. This outcome is encouraging, given the challenge of stabilizing aboveground residues into the mineral matrix without increasing tillage-induced C losses from native SOM and residues due to enhanced decomposition. At Site 2, there was an increase in C and N stocks in surface soil after the second maize year (2007). Whole field C stocks in the 0-400 kg soil m-2 layer of Site 2 were 6.42 ± 0.30, 6.18 ± 0.32, 6.81 ± 0.26 and 6.72 ± 0.29 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. The changes in soil 13C signature and monosaccharide composition, together with changes in SOM fraction amount support a large input of soybean residues as key to promote stabilization of standing maize litter through physical protection and humification. Preferential SOM accumulation in the largest, most C-enriched aggregates was associated with less humified SOM fractions while similar accumulation rates of more humified fractions were found among aggregate classes. These findings support stabilization of crop residues as SOM under high yield maize and soybean management at field scale.
EEA Paraná
Fil: Wingeyer, Ana Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina
Materia
Materia Orgánica del Suelo
Cultivos
Manejo del Cultivo
Residuos
Explotaciones Agrarias
Soil Organic Matter
Crops
Crop Management
Residues
Farms
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/5745

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network_name_str INTA Digital (INTA)
spelling Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm LevelWingeyer, Ana BeatrizMateria Orgánica del SueloCultivosManejo del CultivoResiduosExplotaciones AgrariasSoil Organic MatterCropsCrop ManagementResiduesFarmsTesis para obtener el grado de Doctor of Philosophy, Major: Agronomy, de la University of Nebraska, en 2011This dissertation explores changes over time in soil organic matter (SOM) stabilization of two irrigated production fields: a continuous maize sequence that was converted from no-till to conservation deep tillage (Site 1), and a no-till maize-soybean rotation (Site 2). An integrated approach using humic acid extractions and density-based physical fractionation of SOM within aggregate size classes was developed to evaluate the changes in SOM stabilization (physical protection, organo-mineral associations and humification). At Site 1, loss of SOM in the surface layer was compensated for by increased SOM in deeper soil layers with no net change in C stocks. Whole field C-stocks in the 0-400 kg soil m-2 layer of Site 1 were 7.09 ± 0.29, 7.47 ± 0.36, 7.15 ± 0.37 and 7.18 ± 0.41 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. This outcome is encouraging, given the challenge of stabilizing aboveground residues into the mineral matrix without increasing tillage-induced C losses from native SOM and residues due to enhanced decomposition. At Site 2, there was an increase in C and N stocks in surface soil after the second maize year (2007). Whole field C stocks in the 0-400 kg soil m-2 layer of Site 2 were 6.42 ± 0.30, 6.18 ± 0.32, 6.81 ± 0.26 and 6.72 ± 0.29 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. The changes in soil 13C signature and monosaccharide composition, together with changes in SOM fraction amount support a large input of soybean residues as key to promote stabilization of standing maize litter through physical protection and humification. Preferential SOM accumulation in the largest, most C-enriched aggregates was associated with less humified SOM fractions while similar accumulation rates of more humified fractions were found among aggregate classes. These findings support stabilization of crop residues as SOM under high yield maize and soybean management at field scale.EEA ParanáFil: Wingeyer, Ana Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; ArgentinaUniversity of NebraskaDrijbe, RhaeOlk, Daniel2019-09-02T12:52:38Z2019-09-02T12:52:38Z2011info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_db06info:ar-repo/semantics/tesisDoctoralapplication/pdfhttp://hdl.handle.net/20.500.12123/5745https://digitalcommons.unl.edu/agronhortdiss/43/enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuaria2025-09-29T13:44:44Zoai:localhost:20.500.12123/5745instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:45.215INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
title Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
spellingShingle Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
Wingeyer, Ana Beatriz
Materia Orgánica del Suelo
Cultivos
Manejo del Cultivo
Residuos
Explotaciones Agrarias
Soil Organic Matter
Crops
Crop Management
Residues
Farms
title_short Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
title_full Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
title_fullStr Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
title_full_unstemmed Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
title_sort Impact of Crop and Residue Management on the Physical and Chemical Stabilization of Soil Organic Matter at Farm Level
dc.creator.none.fl_str_mv Wingeyer, Ana Beatriz
author Wingeyer, Ana Beatriz
author_facet Wingeyer, Ana Beatriz
author_role author
dc.contributor.none.fl_str_mv Drijbe, Rhae
Olk, Daniel
dc.subject.none.fl_str_mv Materia Orgánica del Suelo
Cultivos
Manejo del Cultivo
Residuos
Explotaciones Agrarias
Soil Organic Matter
Crops
Crop Management
Residues
Farms
topic Materia Orgánica del Suelo
Cultivos
Manejo del Cultivo
Residuos
Explotaciones Agrarias
Soil Organic Matter
Crops
Crop Management
Residues
Farms
dc.description.none.fl_txt_mv Tesis para obtener el grado de Doctor of Philosophy, Major: Agronomy, de la University of Nebraska, en 2011
This dissertation explores changes over time in soil organic matter (SOM) stabilization of two irrigated production fields: a continuous maize sequence that was converted from no-till to conservation deep tillage (Site 1), and a no-till maize-soybean rotation (Site 2). An integrated approach using humic acid extractions and density-based physical fractionation of SOM within aggregate size classes was developed to evaluate the changes in SOM stabilization (physical protection, organo-mineral associations and humification). At Site 1, loss of SOM in the surface layer was compensated for by increased SOM in deeper soil layers with no net change in C stocks. Whole field C-stocks in the 0-400 kg soil m-2 layer of Site 1 were 7.09 ± 0.29, 7.47 ± 0.36, 7.15 ± 0.37 and 7.18 ± 0.41 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. This outcome is encouraging, given the challenge of stabilizing aboveground residues into the mineral matrix without increasing tillage-induced C losses from native SOM and residues due to enhanced decomposition. At Site 2, there was an increase in C and N stocks in surface soil after the second maize year (2007). Whole field C stocks in the 0-400 kg soil m-2 layer of Site 2 were 6.42 ± 0.30, 6.18 ± 0.32, 6.81 ± 0.26 and 6.72 ± 0.29 kg C m-2 in fall of 2005, 2006, 2007 and 2008, respectively. The changes in soil 13C signature and monosaccharide composition, together with changes in SOM fraction amount support a large input of soybean residues as key to promote stabilization of standing maize litter through physical protection and humification. Preferential SOM accumulation in the largest, most C-enriched aggregates was associated with less humified SOM fractions while similar accumulation rates of more humified fractions were found among aggregate classes. These findings support stabilization of crop residues as SOM under high yield maize and soybean management at field scale.
EEA Paraná
Fil: Wingeyer, Ana Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina
description Tesis para obtener el grado de Doctor of Philosophy, Major: Agronomy, de la University of Nebraska, en 2011
publishDate 2011
dc.date.none.fl_str_mv 2011
2019-09-02T12:52:38Z
2019-09-02T12:52:38Z
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_db06
info:ar-repo/semantics/tesisDoctoral
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/5745
https://digitalcommons.unl.edu/agronhortdiss/43/
url http://hdl.handle.net/20.500.12123/5745
https://digitalcommons.unl.edu/agronhortdiss/43/
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv University of Nebraska
publisher.none.fl_str_mv University of Nebraska
dc.source.none.fl_str_mv reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.559606