Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues

Detalhes bibliográficos
Autor(a) principal: Minhas, P.S.
Data de Publicação: 2020
Outros Autores: Ramos, Tiago B., Ben-Gal, Alon, Pereira, L.S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/21805
Resumo: Review
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spelling Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issuesFAO56correcting Kc for salinityleaching requirementsalinity modelingsalinity managementirrigation to cope with salinitywater and salinity stress coefficient (Ks)ReviewSoil and water salinity and associated problems are a major challenge for global food production. Strategies to cope with salinity include a better understanding of the impacts of temporal and spatial dynamics of salinity on soil water balances vis-à-vis evapotranspiration (ET) and devising optimal irrigation schedules and efficient methods. Both steady state and transient models are now available for predicting salinity effects on reduction of crop growth and means for its optimization. This paper presents a brief review on the different approaches available, focusing on the FAO56 framework for coping with the effects of soil salinity on crop ET and yields. The FAO56 approach, applied widely in soil water balance models, is commonly used to compute water requirements, including leaching needs. It adopts a daily stress coefficient (Ks) representing both water and salt stresses to adjust the crop coefficient (Kc) when it is multiplied by the grass reference ETo to obtain the actual crop ET values for saline environments (ETc act=Ks Kc ETo). The same concept is also applied to the dual Kc approach, with Ks used to adjust the basal crop coefficient (Kcb). A review on applications of Ks is presented showing that the FAO56 approach may play an interesting role in water balance computations aimed at supporting irrigation scheduling. Transient state models, through alternative formulations, provide additional solutions for quantification of the salinity build-up in the root zone. These include irrigation-induced salinity, upward movement of salts from saline ground water-table, and sodification processes. Regardless of the approach, these models are now very much capable of supporting irrigation water management in saline stress conditions. For maintaining crop growth under salinity environments, soil-crop-water management interventions consistent with site-specific conditions are then discussed. Adequateness of irrigation methods, cyclic uses of multi-salinity waters and proper irrigation scheduling are further analyzed as examples of efficient means to obviate the effects of salinityElsevierRepositório da Universidade de LisboaMinhas, P.S.Ramos, Tiago B.Ben-Gal, AlonPereira, L.S.2021-09-14T10:05:41Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/21805engAgricultural Water Management 227 (2020) 105832https://doi.org/10.1016/j.agwat.2019.105832info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:51:20Zoai:www.repository.utl.pt:10400.5/21805Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:06:19.562868Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
title Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
spellingShingle Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
Minhas, P.S.
FAO56
correcting Kc for salinity
leaching requirement
salinity modeling
salinity management
irrigation to cope with salinity
water and salinity stress coefficient (Ks)
title_short Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
title_full Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
title_fullStr Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
title_full_unstemmed Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
title_sort Coping with salinity in irrigated agriculture: crop evapotranspiration and water management issues
author Minhas, P.S.
author_facet Minhas, P.S.
Ramos, Tiago B.
Ben-Gal, Alon
Pereira, L.S.
author_role author
author2 Ramos, Tiago B.
Ben-Gal, Alon
Pereira, L.S.
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Minhas, P.S.
Ramos, Tiago B.
Ben-Gal, Alon
Pereira, L.S.
dc.subject.por.fl_str_mv FAO56
correcting Kc for salinity
leaching requirement
salinity modeling
salinity management
irrigation to cope with salinity
water and salinity stress coefficient (Ks)
topic FAO56
correcting Kc for salinity
leaching requirement
salinity modeling
salinity management
irrigation to cope with salinity
water and salinity stress coefficient (Ks)
description Review
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01T00:00:00Z
2021-09-14T10:05:41Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/21805
url http://hdl.handle.net/10400.5/21805
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Agricultural Water Management 227 (2020) 105832
https://doi.org/10.1016/j.agwat.2019.105832
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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