Rice growth under water stress levels imposed at distinct developmental stages
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://doi.org/10.19084/RCA16133 |
Resumo: | We aimed to assess rice growth as function of water stress at distinct crop stages, under greenhouse, using randomized block design and factorial scheme 3 × 4 + 1, with four replications. Factor A was the growth stage when water stress was imposed, being (1) vegetative, (2) reproductive 1, and (3) reproductive 2; factor B was four levels of water stress (0 ‑ 200 kPa). The additional treatment consisted of a flooded check. Water was replenished to saturation every time the threshold stress was reached. Rice height is reduced when stress is applied either at vegetative or reproductive stages; tillering was affected only by water stress at the vegetative stage, and plants did not recover after the stress was withdrawn; surplus in leaf area is likely to help recovering plant performance from stress applied at the vegetative stage; water content was not affected by water stress, but shoot dry mass of culms was reduced with stress between tillering start and anthesis; root volume did not increase as function of water stress at the vegetative stage. Rice growth is little affected by the absence of waterlogging, but stress levels should be below 30 kPa throughout cropping cycle. |
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Rice growth under water stress levels imposed at distinct developmental stagesCrescimento do arroz sob níveis de estresse hídrico impostos em diferentes estádios de desenvolvimentoGeralWe aimed to assess rice growth as function of water stress at distinct crop stages, under greenhouse, using randomized block design and factorial scheme 3 × 4 + 1, with four replications. Factor A was the growth stage when water stress was imposed, being (1) vegetative, (2) reproductive 1, and (3) reproductive 2; factor B was four levels of water stress (0 ‑ 200 kPa). The additional treatment consisted of a flooded check. Water was replenished to saturation every time the threshold stress was reached. Rice height is reduced when stress is applied either at vegetative or reproductive stages; tillering was affected only by water stress at the vegetative stage, and plants did not recover after the stress was withdrawn; surplus in leaf area is likely to help recovering plant performance from stress applied at the vegetative stage; water content was not affected by water stress, but shoot dry mass of culms was reduced with stress between tillering start and anthesis; root volume did not increase as function of water stress at the vegetative stage. Rice growth is little affected by the absence of waterlogging, but stress levels should be below 30 kPa throughout cropping cycle.Avaliou-se o crescimento do arroz em função do estresse hídrico em diferentes fases fenológicas, em casa‑de‑vegetação, em delineamento de blocos casualizados, esquema fatorial 3 × 4 + 1, com quatro repetições. O fator A representou a fase fenológica da planta com imposição de estresse, sendo (1) vegetativo, (2) reprodutivo 1, (3) reprodutivo 2; o fator B representou os níveis de estresse (0 ‑ 200 kPa); o tratamento adicional foi composto por uma testemunha inundada. A água foi reposta ao alcançar o nível de estresse determinado para o tratamento. As plantas cresceram menos com estresse tanto nas fases vegetativa como reprodutiva; o perfilhamento foi afetado pelo estresse na fase vegetativa; a expansão de área foliar auxilia na posterior recuperação da planta quando o estresse foi imposto na fase vegetativa; o conteúdo de água não foi afetado pelo estresse, mas a massa seca de colmos foi reduzida quando o estresse ocorreu entre início do perfilhamento e antese; por fim, o volume de raízes não aumentou com imposição de estresse na fase vegetativa. O crescimento do arroz é pouco afetado pela falta de inundação, mas o estresse hídrico deve permanecer abaixo de 30 kPa durante todo o ciclo da cultura.Sociedade de Ciências Agrárias de Portugal2019-01-11T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://doi.org/10.19084/RCA16133eng2183-041X0871-018XParfitt, José Maria BarbatConcenço, GermaniDowning, KellyLarue, JakeSilva, Jaqueline Trombetta dainfo: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:RCAAP2022-09-06T09:24:34Zoai:ojs.revistas.rcaap.pt:article/16496Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:30:55.372557Repositório 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 |
Rice growth under water stress levels imposed at distinct developmental stages Crescimento do arroz sob níveis de estresse hídrico impostos em diferentes estádios de desenvolvimento |
title |
Rice growth under water stress levels imposed at distinct developmental stages |
spellingShingle |
Rice growth under water stress levels imposed at distinct developmental stages Parfitt, José Maria Barbat Geral |
title_short |
Rice growth under water stress levels imposed at distinct developmental stages |
title_full |
Rice growth under water stress levels imposed at distinct developmental stages |
title_fullStr |
Rice growth under water stress levels imposed at distinct developmental stages |
title_full_unstemmed |
Rice growth under water stress levels imposed at distinct developmental stages |
title_sort |
Rice growth under water stress levels imposed at distinct developmental stages |
author |
Parfitt, José Maria Barbat |
author_facet |
Parfitt, José Maria Barbat Concenço, Germani Downing, Kelly Larue, Jake Silva, Jaqueline Trombetta da |
author_role |
author |
author2 |
Concenço, Germani Downing, Kelly Larue, Jake Silva, Jaqueline Trombetta da |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Parfitt, José Maria Barbat Concenço, Germani Downing, Kelly Larue, Jake Silva, Jaqueline Trombetta da |
dc.subject.por.fl_str_mv |
Geral |
topic |
Geral |
description |
We aimed to assess rice growth as function of water stress at distinct crop stages, under greenhouse, using randomized block design and factorial scheme 3 × 4 + 1, with four replications. Factor A was the growth stage when water stress was imposed, being (1) vegetative, (2) reproductive 1, and (3) reproductive 2; factor B was four levels of water stress (0 ‑ 200 kPa). The additional treatment consisted of a flooded check. Water was replenished to saturation every time the threshold stress was reached. Rice height is reduced when stress is applied either at vegetative or reproductive stages; tillering was affected only by water stress at the vegetative stage, and plants did not recover after the stress was withdrawn; surplus in leaf area is likely to help recovering plant performance from stress applied at the vegetative stage; water content was not affected by water stress, but shoot dry mass of culms was reduced with stress between tillering start and anthesis; root volume did not increase as function of water stress at the vegetative stage. Rice growth is little affected by the absence of waterlogging, but stress levels should be below 30 kPa throughout cropping cycle. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-11T00:00:00Z |
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 |
https://doi.org/10.19084/RCA16133 |
url |
https://doi.org/10.19084/RCA16133 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2183-041X 0871-018X |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Sociedade de Ciências Agrárias de Portugal |
publisher.none.fl_str_mv |
Sociedade de Ciências Agrárias de Portugal |
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 |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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 |
repository.mail.fl_str_mv |
|
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1799130175329271808 |