Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system

Rainfed agricultural systems in semiarid Mediterranean environments are subject to erratic but often heavy rainfall events. As an agronomic practice, fallow periods can be included even within the existing EU common policy for crop diversification. This research aimed to quantify the effects of a pr...

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Detalhes bibliográficos
Autores: Shakoor, Awais, Bosch Serra, Àngela D., Lidón Cerezuela, Antonio L., Ginestar, Damian, Boixadera Llobet, Jaume
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Recursos:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/84566
Acesso em linha:https://doi.org/10.1016/j.pedsph.2022.06.051
http://hdl.handle.net/10459.1/84566
Access Level:acceso abierto
Palavra-chave:Nitrogen
Composició dels sòls
Anàlisi dels sòls
Soil composition
Soil analysis
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spelling Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean systemShakoor, AwaisBosch Serra, Àngela D.Lidón Cerezuela, Antonio L.Ginestar, DamianBoixadera Llobet, JaumeNitrogenComposició dels sòlsAnàlisi dels sòlsNitrogenSoil compositionSoil analysisRainfed agricultural systems in semiarid Mediterranean environments are subject to erratic but often heavy rainfall events. As an agronomic practice, fallow periods can be included even within the existing EU common policy for crop diversification. This research aimed to quantify the effects of a previous mineral fertilization on the soil mineral nitrogen (Nmin) content and on potential nitrate leaching during no-tilled fallow periods of a crop rotation. Water and Nmin soil measurements obtained during three fallow seasons were used. Data were also used to check if the Leaching Estimation and Chemistry Model (LEACHM) can be used for the soil Nmin prediction after fallow. During these periods, the Nmin measured in the soil profile increased on average by 125 kg N ha-1, while the model averaged an increase of 95 kg N ha-1. The estimate of N leached ranged from 11 to 38 kg N ha-1. The N balance simulated using LEACHM might differ from the actual processes. After a drought period followed by a soil water replenishment, the calibrated LEACHM underestimated soil Nmin probably due to the 'Birch effect'. After occasional rainy spells when soil quickly became saturated, LEACHM overestimated soil Nmin probably due to occasional N2O emissions not being fully accounted by the model and to specific preferential water flow, which might produce a greater nitrate leaching than that simulated by LEACHM using the convection-dispersion equation. The results show that soil Nmin measurements by sampling after the fallow period cannot be replaced by LEACHM simulations. These samplings are of interest in fallow established inside a rotation and to avoid over-fertilization in the following cropping season, while reducing N environmental impacts.2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1016/j.pedsph.2022.06.051http://hdl.handle.net/10459.1/84566reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.pedsph.2022.06.051Pedosphere, 2023, vol. 33, num. 4, p. 622-637cc-by-nc-nd (c) Soil Science Society of China, 2022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/4.0/oai:repositori.udl.cat:10459.1/845662026-06-24T12:42:17Z
dc.title.none.fl_str_mv Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
title Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
spellingShingle Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
Shakoor, Awais
Nitrogen
Composició dels sòls
Anàlisi dels sòls
Nitrogen
Soil composition
Soil analysis
title_short Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
title_full Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
title_fullStr Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
title_full_unstemmed Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
title_sort Soil nitrogen dynamics in fallow periods in a rainfed semiarid Mediterranean system
dc.creator.none.fl_str_mv Shakoor, Awais
Bosch Serra, Àngela D.
Lidón Cerezuela, Antonio L.
Ginestar, Damian
Boixadera Llobet, Jaume
author Shakoor, Awais
author_facet Shakoor, Awais
Bosch Serra, Àngela D.
Lidón Cerezuela, Antonio L.
Ginestar, Damian
Boixadera Llobet, Jaume
author_role author
author2 Bosch Serra, Àngela D.
Lidón Cerezuela, Antonio L.
Ginestar, Damian
Boixadera Llobet, Jaume
author2_role author
author
author
author
dc.subject.none.fl_str_mv Nitrogen
Composició dels sòls
Anàlisi dels sòls
Nitrogen
Soil composition
Soil analysis
topic Nitrogen
Composició dels sòls
Anàlisi dels sòls
Nitrogen
Soil composition
Soil analysis
description Rainfed agricultural systems in semiarid Mediterranean environments are subject to erratic but often heavy rainfall events. As an agronomic practice, fallow periods can be included even within the existing EU common policy for crop diversification. This research aimed to quantify the effects of a previous mineral fertilization on the soil mineral nitrogen (Nmin) content and on potential nitrate leaching during no-tilled fallow periods of a crop rotation. Water and Nmin soil measurements obtained during three fallow seasons were used. Data were also used to check if the Leaching Estimation and Chemistry Model (LEACHM) can be used for the soil Nmin prediction after fallow. During these periods, the Nmin measured in the soil profile increased on average by 125 kg N ha-1, while the model averaged an increase of 95 kg N ha-1. The estimate of N leached ranged from 11 to 38 kg N ha-1. The N balance simulated using LEACHM might differ from the actual processes. After a drought period followed by a soil water replenishment, the calibrated LEACHM underestimated soil Nmin probably due to the 'Birch effect'. After occasional rainy spells when soil quickly became saturated, LEACHM overestimated soil Nmin probably due to occasional N2O emissions not being fully accounted by the model and to specific preferential water flow, which might produce a greater nitrate leaching than that simulated by LEACHM using the convection-dispersion equation. The results show that soil Nmin measurements by sampling after the fallow period cannot be replaced by LEACHM simulations. These samplings are of interest in fallow established inside a rotation and to avoid over-fertilization in the following cropping season, while reducing N environmental impacts.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.pedsph.2022.06.051
http://hdl.handle.net/10459.1/84566
url https://doi.org/10.1016/j.pedsph.2022.06.051
http://hdl.handle.net/10459.1/84566
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.pedsph.2022.06.051
Pedosphere, 2023, vol. 33, num. 4, p. 622-637
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Soil Science Society of China, 2022
info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/4.0/
rights_invalid_str_mv cc-by-nc-nd (c) Soil Science Society of China, 2022
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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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score 15,811543

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