Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
DOI: | 10.1590/1807-1929/agriambi.v21n12p822-827 |
Texto Completo: | http://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827 http://hdl.handle.net/11449/163512 |
Resumo: | The objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc. |
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Defoliation of sweet corn plants under irrigation depths and its impact on gas exchangeZea mays L. var. saccharatawater stressphotosynthesisThe objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Estadual Paulista, Fac Ciencias Agron, Dept Engn Rural, Botucatu, SP, BrazilUniv Fed Mato Grosso do Sul, Campus Chapadao do Sul, Chapadao Do Sul, MS, BrazilUniv Fed Vale Sao Francisco, Colegiado Acad Engn Agron, Campus Ciencias Agr, Petrolina, PE, BrazilUniv Estadual Paulista, Fac Ciencias Agron, Dept Engn Rural, Botucatu, SP, BrazilUniv Federal Campina GrandeUniversidade Estadual Paulista (Unesp)Universidade Federal de Mato Grosso do Sul (UFMS)Univ Fed Vale Sao FranciscoSantos, Osvaldir F. dos [UNESP]Lima, Sebastiao F. dePaiva Neto, Vespasiano B. dePiati, Gabriel L.Osorio, Christian R. W. de S.Souza, Hugo M. de2018-11-26T17:42:20Z2018-11-26T17:42:20Z2017-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article822-827application/pdfhttp://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017.1807-1929http://hdl.handle.net/11449/16351210.1590/1807-1929/agriambi.v21n12p822-827S1415-43662017001200822WOS:000416041100002S1415-43662017001200822.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira De Engenharia Agricola E Ambientalinfo:eu-repo/semantics/openAccess2024-04-30T14:00:36Zoai:repositorio.unesp.br:11449/163512Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:27:10.135127Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
title |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
spellingShingle |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange Santos, Osvaldir F. dos [UNESP] Zea mays L. var. saccharata water stress photosynthesis Santos, Osvaldir F. dos [UNESP] Zea mays L. var. saccharata water stress photosynthesis |
title_short |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
title_full |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
title_fullStr |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
title_full_unstemmed |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
title_sort |
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange |
author |
Santos, Osvaldir F. dos [UNESP] |
author_facet |
Santos, Osvaldir F. dos [UNESP] Santos, Osvaldir F. dos [UNESP] Lima, Sebastiao F. de Paiva Neto, Vespasiano B. de Piati, Gabriel L. Osorio, Christian R. W. de S. Souza, Hugo M. de Lima, Sebastiao F. de Paiva Neto, Vespasiano B. de Piati, Gabriel L. Osorio, Christian R. W. de S. Souza, Hugo M. de |
author_role |
author |
author2 |
Lima, Sebastiao F. de Paiva Neto, Vespasiano B. de Piati, Gabriel L. Osorio, Christian R. W. de S. Souza, Hugo M. de |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Mato Grosso do Sul (UFMS) Univ Fed Vale Sao Francisco |
dc.contributor.author.fl_str_mv |
Santos, Osvaldir F. dos [UNESP] Lima, Sebastiao F. de Paiva Neto, Vespasiano B. de Piati, Gabriel L. Osorio, Christian R. W. de S. Souza, Hugo M. de |
dc.subject.por.fl_str_mv |
Zea mays L. var. saccharata water stress photosynthesis |
topic |
Zea mays L. var. saccharata water stress photosynthesis |
description |
The objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-01 2018-11-26T17:42:20Z 2018-11-26T17:42:20Z |
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://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827 Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017. 1807-1929 http://hdl.handle.net/11449/163512 10.1590/1807-1929/agriambi.v21n12p822-827 S1415-43662017001200822 WOS:000416041100002 S1415-43662017001200822.pdf |
url |
http://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827 http://hdl.handle.net/11449/163512 |
identifier_str_mv |
Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017. 1807-1929 10.1590/1807-1929/agriambi.v21n12p822-827 S1415-43662017001200822 WOS:000416041100002 S1415-43662017001200822.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira De Engenharia Agricola E Ambiental |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
822-827 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Federal Campina Grande |
publisher.none.fl_str_mv |
Univ Federal Campina Grande |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1822218563761471488 |
dc.identifier.doi.none.fl_str_mv |
10.1590/1807-1929/agriambi.v21n12p822-827 |