Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions

Low-intensity soil management systems like no-tillage (NT) are being increasingly accepted as an essential part of sustainable farming systems. The objective of this work was to study the effects of NT maintenance over time on soil aggregation and soil organic carbon (SOC) protection on a semiarid M...

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Autores: Plaza Bonilla, Daniel, Cantero-Martínez, Carlos, Viñas Dueso, Pablo, Álvaro-Fuentes, Jorge
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2013
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/58826
Acceso en línea:https://doi.org/10.1016/j.geoderma.2012.10.022
http://hdl.handle.net/10459.1/58826
Access Level:acceso abierto
Palabra clave:No-tillage
Soil aggregation
Soil organic carbon
Chronosequence
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spelling Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditionsPlaza Bonilla, DanielCantero-Martínez, CarlosViñas Dueso, PabloÁlvaro-Fuentes, JorgeNo-tillageSoil aggregationSoil organic carbonChronosequenceLow-intensity soil management systems like no-tillage (NT) are being increasingly accepted as an essential part of sustainable farming systems. The objective of this work was to study the effects of NT maintenance over time on soil aggregation and soil organic carbon (SOC) protection on a semiarid Mediterranean agroecosystem. A NT chronosequence was established with five phases: (i) conventional tillage (CT); (ii) NT for 1 year (NT-1); (iii) NT for 4 years (NT-4); (iv) NT for 11 years (NT-11) and (v) NT for 20 years (NT-20). N fertilization was based on pig slurry for the whole experimental area. Soil samples were collected from four depths (i.e., 0–5, 5–10, 10–20, 20–30 cm). Dry and water-stable aggregates, SOC concentration and C concentration of water-stable aggregates were measured. SOC concentration reached its maximum value after 11 years under NT. However, the differences between NT phases were only found in the 0–5 cm soil depth. In soil surface (i.e., 0–5 cm), water-stable large macroaggregates (2–8 mm) were 0.02, 0.12, 0.32 and 0.31 g g− 1 dry soil for the NT-1, NT-4, NT-11 and NT-20 phases, respectively. C concentration of microaggregates increased in relation with the number of years under NT. SOC and water-stable macroaggregate stratification were greatest with the increase in the years under NT, emphasizing the close relationship between SOC and aggregation. In Mediterranean semiarid agroecosystems, the increase in the proportion of stable macroaggregates and the enrichment of C concentration within microaggregates are two main mechanisms of SOC protection when NT is maintained over time.This research was supported by the Comision Interministerial de Ciencia y Tecnologia of Spain (AGL 2004-07763-C02-02 and AGL 2010-22050-C03-01). D. Plaza-Bonilla was awarded with a FPU fellowship by the Spanish Ministry of Education. Jorge Álvaro-Fuentes acknowledges the Consejo Superior de Investigaciones Científicas (CSIC) for his contract within the “Junta para la Ampliación de Estudios” (JAE-DOC) programme co-financed by the European Social Fund.Elsevier2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionhttps://doi.org/10.1016/j.geoderma.2012.10.022http://hdl.handle.net/10459.1/58826reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésMIECI/PN2004-2007/AGL2004-07763-C02-02MICINN/PN2008-2011/AGL2010-22050-C03-01Versió preprint del document publicat a https://doi.org/10.1016/j.geoderma.2012.10.022Geoderma, 2013, vol. 193-194, p. 76-82(c) Elsevier B.V., 2012info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/588262026-06-24T12:42:17Z
dc.title.none.fl_str_mv Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
title Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
spellingShingle Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
Plaza Bonilla, Daniel
No-tillage
Soil aggregation
Soil organic carbon
Chronosequence
title_short Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
title_full Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
title_fullStr Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
title_full_unstemmed Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
title_sort Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions
dc.creator.none.fl_str_mv Plaza Bonilla, Daniel
Cantero-Martínez, Carlos
Viñas Dueso, Pablo
Álvaro-Fuentes, Jorge
author Plaza Bonilla, Daniel
author_facet Plaza Bonilla, Daniel
Cantero-Martínez, Carlos
Viñas Dueso, Pablo
Álvaro-Fuentes, Jorge
author_role author
author2 Cantero-Martínez, Carlos
Viñas Dueso, Pablo
Álvaro-Fuentes, Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv No-tillage
Soil aggregation
Soil organic carbon
Chronosequence
topic No-tillage
Soil aggregation
Soil organic carbon
Chronosequence
description Low-intensity soil management systems like no-tillage (NT) are being increasingly accepted as an essential part of sustainable farming systems. The objective of this work was to study the effects of NT maintenance over time on soil aggregation and soil organic carbon (SOC) protection on a semiarid Mediterranean agroecosystem. A NT chronosequence was established with five phases: (i) conventional tillage (CT); (ii) NT for 1 year (NT-1); (iii) NT for 4 years (NT-4); (iv) NT for 11 years (NT-11) and (v) NT for 20 years (NT-20). N fertilization was based on pig slurry for the whole experimental area. Soil samples were collected from four depths (i.e., 0–5, 5–10, 10–20, 20–30 cm). Dry and water-stable aggregates, SOC concentration and C concentration of water-stable aggregates were measured. SOC concentration reached its maximum value after 11 years under NT. However, the differences between NT phases were only found in the 0–5 cm soil depth. In soil surface (i.e., 0–5 cm), water-stable large macroaggregates (2–8 mm) were 0.02, 0.12, 0.32 and 0.31 g g− 1 dry soil for the NT-1, NT-4, NT-11 and NT-20 phases, respectively. C concentration of microaggregates increased in relation with the number of years under NT. SOC and water-stable macroaggregate stratification were greatest with the increase in the years under NT, emphasizing the close relationship between SOC and aggregation. In Mediterranean semiarid agroecosystems, the increase in the proportion of stable macroaggregates and the enrichment of C concentration within microaggregates are two main mechanisms of SOC protection when NT is maintained over time.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.geoderma.2012.10.022
http://hdl.handle.net/10459.1/58826
url https://doi.org/10.1016/j.geoderma.2012.10.022
http://hdl.handle.net/10459.1/58826
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv MIECI/PN2004-2007/AGL2004-07763-C02-02
MICINN/PN2008-2011/AGL2010-22050-C03-01
Versió preprint del document publicat a https://doi.org/10.1016/j.geoderma.2012.10.022
Geoderma, 2013, vol. 193-194, p. 76-82
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2012
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2012
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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