Potencial da água na folha como indicador de déficit hídrico em milho
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/95237 |
Resumo: | This study was carried out at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul, in Eldorado do Sul, RS, Brazil, during the agricultural seasons of 1993/94 and 1994/95. The objective was to evaluate the leaf water potential as an indicator of the water deficit in maize (Zea mays L.), and its relation with the soil water potential. The experiment comprised three levels of irrigation, from field capacity to absence of irrigation. The values of the minimum leaf water potential ranged from -1.2 to -1.5 MPa in irrigated plants (field capacity) and from -1.6 to -2.0 MPa in nonirrigated plants. The minimum leaf water potential was well correlated to the matric water potential measured at 45 cm deep (r2 = 0.73). The sunset leaf water potential showed relationship with the minimum leaf water potential indicating it to be an indicator of water deficit. The predawn leaf water potential showed clear differences between the utmost treatments, but did not show any consistent relationship with the minimum leaf water potential. |
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Bergonci, Joao ItoBergamaschi, HomeroBerlato, Moacir AntonioSantos, Antonio Odair2014-05-15T02:07:30Z20000100-204Xhttp://hdl.handle.net/10183/95237000287701This study was carried out at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul, in Eldorado do Sul, RS, Brazil, during the agricultural seasons of 1993/94 and 1994/95. The objective was to evaluate the leaf water potential as an indicator of the water deficit in maize (Zea mays L.), and its relation with the soil water potential. The experiment comprised three levels of irrigation, from field capacity to absence of irrigation. The values of the minimum leaf water potential ranged from -1.2 to -1.5 MPa in irrigated plants (field capacity) and from -1.6 to -2.0 MPa in nonirrigated plants. The minimum leaf water potential was well correlated to the matric water potential measured at 45 cm deep (r2 = 0.73). The sunset leaf water potential showed relationship with the minimum leaf water potential indicating it to be an indicator of water deficit. The predawn leaf water potential showed clear differences between the utmost treatments, but did not show any consistent relationship with the minimum leaf water potential.application/pdfporPesquisa agropecuária brasileira : 1977. Brasília. Vol. 35, n. 8 (ago. 2000), p. 1531-1540MilhoDeficiencia hidricaZea maysplant water relationssoil water potentialirrigation ratesPotencial da água na folha como indicador de déficit hídrico em milhoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000287701.pdf000287701.pdfTexto completoapplication/pdf60847http://www.lume.ufrgs.br/bitstream/10183/95237/1/000287701.pdfafb7c84c7e34a1629e992ca1e716e954MD51TEXT000287701.pdf.txt000287701.pdf.txtExtracted Texttext/plain33610http://www.lume.ufrgs.br/bitstream/10183/95237/2/000287701.pdf.txt51fdd5645d8eeb87010236d8afb4fa3dMD52THUMBNAIL000287701.pdf.jpg000287701.pdf.jpgGenerated Thumbnailimage/jpeg1439http://www.lume.ufrgs.br/bitstream/10183/95237/3/000287701.pdf.jpg66969edbe0ab1ff96262d789f1993e94MD5310183/952372018-10-08 08:45:52.398oai:www.lume.ufrgs.br:10183/95237Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-08T11:45:52Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Potencial da água na folha como indicador de déficit hídrico em milho |
title |
Potencial da água na folha como indicador de déficit hídrico em milho |
spellingShingle |
Potencial da água na folha como indicador de déficit hídrico em milho Bergonci, Joao Ito Milho Deficiencia hidrica Zea mays plant water relations soil water potential irrigation rates |
title_short |
Potencial da água na folha como indicador de déficit hídrico em milho |
title_full |
Potencial da água na folha como indicador de déficit hídrico em milho |
title_fullStr |
Potencial da água na folha como indicador de déficit hídrico em milho |
title_full_unstemmed |
Potencial da água na folha como indicador de déficit hídrico em milho |
title_sort |
Potencial da água na folha como indicador de déficit hídrico em milho |
author |
Bergonci, Joao Ito |
author_facet |
Bergonci, Joao Ito Bergamaschi, Homero Berlato, Moacir Antonio Santos, Antonio Odair |
author_role |
author |
author2 |
Bergamaschi, Homero Berlato, Moacir Antonio Santos, Antonio Odair |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Bergonci, Joao Ito Bergamaschi, Homero Berlato, Moacir Antonio Santos, Antonio Odair |
dc.subject.por.fl_str_mv |
Milho Deficiencia hidrica |
topic |
Milho Deficiencia hidrica Zea mays plant water relations soil water potential irrigation rates |
dc.subject.eng.fl_str_mv |
Zea mays plant water relations soil water potential irrigation rates |
description |
This study was carried out at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul, in Eldorado do Sul, RS, Brazil, during the agricultural seasons of 1993/94 and 1994/95. The objective was to evaluate the leaf water potential as an indicator of the water deficit in maize (Zea mays L.), and its relation with the soil water potential. The experiment comprised three levels of irrigation, from field capacity to absence of irrigation. The values of the minimum leaf water potential ranged from -1.2 to -1.5 MPa in irrigated plants (field capacity) and from -1.6 to -2.0 MPa in nonirrigated plants. The minimum leaf water potential was well correlated to the matric water potential measured at 45 cm deep (r2 = 0.73). The sunset leaf water potential showed relationship with the minimum leaf water potential indicating it to be an indicator of water deficit. The predawn leaf water potential showed clear differences between the utmost treatments, but did not show any consistent relationship with the minimum leaf water potential. |
publishDate |
2000 |
dc.date.issued.fl_str_mv |
2000 |
dc.date.accessioned.fl_str_mv |
2014-05-15T02:07:30Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/95237 |
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0100-204X |
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000287701 |
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http://hdl.handle.net/10183/95237 |
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por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Pesquisa agropecuária brasileira : 1977. Brasília. Vol. 35, n. 8 (ago. 2000), p. 1531-1540 |
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openAccess |
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application/pdf |
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