Water supply in the critical period of maize and the grain production
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/6846 |
Resumo: | Maize crops may experience reductions of grain yields when submitted to water deficit during the critical period of crop cycle, from tasseling stage to beginning of grain filling. The objective of this work was to demonstrate the importance of the water supply during the critical period on the grain production of maize. Experiments were conducted in Eldorado do Sul, Brazil (30°5'S; 51°40'W; 40 m altitude), during the crop seasons of 1998/1999 and 2002/2003, characterized by La Niña and El Niño phenomenon, respectively. Data of grain yield and its components were obtained in field experiments, using different volumes of water applied through irrigation. The grain yields showed an opposite tendency when compared to the regional estimated average. In 1998/1999, during a long drought period, 46.8 mm of rain on the critical period allowed a grain yield of about 8 t ha-1 without irrigation. In contrast, in 2002/2003 a short drought during the critical period reduced the grain yield to less than 2 t ha-1, affecting the number of ear per plant and the number of kernel per ear. Therefore, risks in the expected maize production are probable, although having climatic forecasting of favorable rain distribution in the region, such as by El Niño phenomenon. |
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Water supply in the critical period of maize and the grain productionDistribuição hídrica no período crítico do milho e produção de grãoswater deficit; irrigation; yield components; climatic riskdéficit hídrico; irrigação; componentes do rendimento; risco climáticoMaize crops may experience reductions of grain yields when submitted to water deficit during the critical period of crop cycle, from tasseling stage to beginning of grain filling. The objective of this work was to demonstrate the importance of the water supply during the critical period on the grain production of maize. Experiments were conducted in Eldorado do Sul, Brazil (30°5'S; 51°40'W; 40 m altitude), during the crop seasons of 1998/1999 and 2002/2003, characterized by La Niña and El Niño phenomenon, respectively. Data of grain yield and its components were obtained in field experiments, using different volumes of water applied through irrigation. The grain yields showed an opposite tendency when compared to the regional estimated average. In 1998/1999, during a long drought period, 46.8 mm of rain on the critical period allowed a grain yield of about 8 t ha-1 without irrigation. In contrast, in 2002/2003 a short drought during the critical period reduced the grain yield to less than 2 t ha-1, affecting the number of ear per plant and the number of kernel per ear. Therefore, risks in the expected maize production are probable, although having climatic forecasting of favorable rain distribution in the region, such as by El Niño phenomenon.A cultura do milho pode sofrer reduções na produção de grãos quando há déficit hídrico no período crítico do ciclo da cultura, que ocorre desde o pendoamento até o início de enchimento de grãos. O objetivo deste trabalho foi estabelecer relações entre o suprimento de água durante o período crítico do milho e a produção de grãos. Experimentos foram conduzidos em Eldorado do Sul, RS (30°5'S; 51°40'W; 40 m altitude), nas safras 1998/1999 e 2002/2003, anos em que ocorreram os fenômenos La Niña e El Niño, respectivamente. Os dados de rendimento de grãos e seus componentes foram obtidos em experimentos de campo, sob diferentes volumes de aplicação de água via irrigação. A produtividade de grãos foi inversa à média geral do Estado, nos dois anos analisados. Em 1998/1999, durante uma estiagem longa, 46,8 mm de chuva no período crítico garantiram rendimento próximo de 8.000 kg ha-1 sem irrigação. Em 2002/2003 uma curta estiagem no período crítico reduziu a produtividade para menos de 2.000 kg ha-1 no mesmo tratamento, afetando o número de espigas por planta e o número de grãos por espiga. Portanto, em anos de El Niño, mesmo que as previsões climáticas apontem para uma distribuição favorável de chuvas, há risco na produção esperada de milho, se o suprimento de água no período crítico da cultura não for adequado.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBergamaschi, HomeroDalmago, Genei AntonioBergonci, João ItoBianchi, Cleusa Adriane MenegassiMüller, Artur GustavoComiran, FláviaHeckler, Bruna Maria Machado2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6846Pesquisa Agropecuaria Brasileira; v.39, n.9, set. 2004; 831-839Pesquisa Agropecuária Brasileira; v.39, n.9, set. 2004; 831-8391678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6846/3902info:eu-repo/semantics/openAccess2014-08-25T19:26:54Zoai:ojs.seer.sct.embrapa.br:article/6846Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-25T19:26:54Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Water supply in the critical period of maize and the grain production Distribuição hídrica no período crítico do milho e produção de grãos |
title |
Water supply in the critical period of maize and the grain production |
spellingShingle |
Water supply in the critical period of maize and the grain production Bergamaschi, Homero water deficit; irrigation; yield components; climatic risk déficit hídrico; irrigação; componentes do rendimento; risco climático |
title_short |
Water supply in the critical period of maize and the grain production |
title_full |
Water supply in the critical period of maize and the grain production |
title_fullStr |
Water supply in the critical period of maize and the grain production |
title_full_unstemmed |
Water supply in the critical period of maize and the grain production |
title_sort |
Water supply in the critical period of maize and the grain production |
author |
Bergamaschi, Homero |
author_facet |
Bergamaschi, Homero Dalmago, Genei Antonio Bergonci, João Ito Bianchi, Cleusa Adriane Menegassi Müller, Artur Gustavo Comiran, Flávia Heckler, Bruna Maria Machado |
author_role |
author |
author2 |
Dalmago, Genei Antonio Bergonci, João Ito Bianchi, Cleusa Adriane Menegassi Müller, Artur Gustavo Comiran, Flávia Heckler, Bruna Maria Machado |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Bergamaschi, Homero Dalmago, Genei Antonio Bergonci, João Ito Bianchi, Cleusa Adriane Menegassi Müller, Artur Gustavo Comiran, Flávia Heckler, Bruna Maria Machado |
dc.subject.por.fl_str_mv |
water deficit; irrigation; yield components; climatic risk déficit hídrico; irrigação; componentes do rendimento; risco climático |
topic |
water deficit; irrigation; yield components; climatic risk déficit hídrico; irrigação; componentes do rendimento; risco climático |
description |
Maize crops may experience reductions of grain yields when submitted to water deficit during the critical period of crop cycle, from tasseling stage to beginning of grain filling. The objective of this work was to demonstrate the importance of the water supply during the critical period on the grain production of maize. Experiments were conducted in Eldorado do Sul, Brazil (30°5'S; 51°40'W; 40 m altitude), during the crop seasons of 1998/1999 and 2002/2003, characterized by La Niña and El Niño phenomenon, respectively. Data of grain yield and its components were obtained in field experiments, using different volumes of water applied through irrigation. The grain yields showed an opposite tendency when compared to the regional estimated average. In 1998/1999, during a long drought period, 46.8 mm of rain on the critical period allowed a grain yield of about 8 t ha-1 without irrigation. In contrast, in 2002/2003 a short drought during the critical period reduced the grain yield to less than 2 t ha-1, affecting the number of ear per plant and the number of kernel per ear. Therefore, risks in the expected maize production are probable, although having climatic forecasting of favorable rain distribution in the region, such as by El Niño phenomenon. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-09-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6846 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/6846 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6846/3902 |
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 |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.39, n.9, set. 2004; 831-839 Pesquisa Agropecuária Brasileira; v.39, n.9, set. 2004; 831-839 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416677710364672 |