EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION

Detalhes bibliográficos
Autor(a) principal: MATZENAUER, RONALDO
Data de Publicação: 1999
Outros Autores: MALUF, JAIME RICARDO TAVARES, BUENO, ARISTIDES CÂMARA
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378
Resumo: Low water availability is a limiting factor for growth and development of summer crops in Rio Grande do Sul State. Brazil. Studies aiming to determine crop coefficients for water requirements are important for water supply recommendation. The objective o f this study was to determine the maximum evapotranspiration of sunflower (ETm) in relation to the reference evapotranspiration (ETo) and with solar radiation (Rs), to obtain the ratios ETm/ ETo (Kc , coefficient) and ETm/Rs (Kc 2 coefficient), at different crop stages. Field experiments were carried out at Centro de Pesquisa de Fruticultura, in Taquari, 29°48'S latitude, 51°49'W longitude and 76 m of altitude, during 1987/ 88, 1989/90, 1990/91 and 1991/92 crop seasons. The average ratio ETm/ETo for the whole crop cycle (from sowing to physiological maturity) was 0.77, while the average ratio ETm/Rs was 0.48 for the same period. The highest average values of crop coefficients occurred during flowering period with average values of 1.12 and 0.71, respectively, for Kc, and Kc 2 .
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spelling EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION RELAÇÕES DA EVAPOTRANSPIRAÇÃO MÁXIMA DO GIRASSOL (Helianthus annuns L.) COM A EVAPOTRANSPIRAÇÃO DE REFERÊNCIA E COM A RADIAÇÃO SOLAR GLOBAagrometeorology, water relationsagrometeorologia, relações hídricasLow water availability is a limiting factor for growth and development of summer crops in Rio Grande do Sul State. Brazil. Studies aiming to determine crop coefficients for water requirements are important for water supply recommendation. The objective o f this study was to determine the maximum evapotranspiration of sunflower (ETm) in relation to the reference evapotranspiration (ETo) and with solar radiation (Rs), to obtain the ratios ETm/ ETo (Kc , coefficient) and ETm/Rs (Kc 2 coefficient), at different crop stages. Field experiments were carried out at Centro de Pesquisa de Fruticultura, in Taquari, 29°48'S latitude, 51°49'W longitude and 76 m of altitude, during 1987/ 88, 1989/90, 1990/91 and 1991/92 crop seasons. The average ratio ETm/ETo for the whole crop cycle (from sowing to physiological maturity) was 0.77, while the average ratio ETm/Rs was 0.48 for the same period. The highest average values of crop coefficients occurred during flowering period with average values of 1.12 and 0.71, respectively, for Kc, and Kc 2 . A baixa disponibilidade hídrica é um dos fatores limitantes ao crescimento e desenvolvimento das culturas de verão no Rio Grande do Sul. Estudos visando a determinação de coeficientes de estimativa das necessidades hídricas são importantes para a recomendação de irrigação buscando minimizar o problema. Com este objetivo, relacionou-se a evapotranspiração máxima da cultura do girassol (ETm) com a evapotranspiração de referência (ETo) e com a radiação solar global (Rs), para obtenção das razões ETm/ETo (coeficiente Kc,) e ETm/Rs (coeficiente Kc 2), em diferentes subperíodos da cultura. O trabalho foi desenvolvido no Centro de Pesquisa de Fruticultura de Taquari/ RS (29°48' de latitude Sul, 51 °49' de longitude Oeste e 76 m de altitude), durante os anos agrícolas 1987/88. 1989/90, 1990/91 e 1991/92. A razão ETin/ETo média no ciclo total (da semeadura até a maturação fisiológica) foi de 0,77, enquanto que. para a razão ETm/Rs, o valor médio foi de 0,48. O subperíodo onde foram verificados os maiores valores para os dois coeficientes, foi do início ao final da floração, com valores médios de 1,12 e 0.71. respectivamente, para Kc, e Kc 2 . Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural1999-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378Pesquisa Agropecuária Gaúcha; Vol 5 No 2 (1999): PESQ. AGROP. GAÚCHA; 241-247Pesquisa Agropecuária Gaúcha; v. 5 n. 2 (1999): PESQ. AGROP. GAÚCHA; 241-2472595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378/347MATZENAUER, RONALDO MALUF, JAIME RICARDO TAVARES BUENO, ARISTIDES CÂMARA info:eu-repo/semantics/openAccess2024-04-22T12:05:01Zoai:ojs.revistapag.agricultura.rs.gov.br:article/378Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:05:01Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
RELAÇÕES DA EVAPOTRANSPIRAÇÃO MÁXIMA DO GIRASSOL (Helianthus annuns L.) COM A EVAPOTRANSPIRAÇÃO DE REFERÊNCIA E COM A RADIAÇÃO SOLAR GLOBA
title EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
spellingShingle EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
MATZENAUER, RONALDO
agrometeorology, water relations
agrometeorologia, relações hídricas
title_short EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
title_full EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
title_fullStr EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
title_full_unstemmed EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
title_sort EVAPOTRANSPIRATION OF SUNFLOWER (Helianthus L) AND ITS RELATIONSHIP WITH THE REFERENCE EVAPOTRANSPIRATION AND GLOBAL SOLAR RADIATION
author MATZENAUER, RONALDO
author_facet MATZENAUER, RONALDO
MALUF, JAIME RICARDO TAVARES
BUENO, ARISTIDES CÂMARA
author_role author
author2 MALUF, JAIME RICARDO TAVARES
BUENO, ARISTIDES CÂMARA
author2_role author
author
dc.contributor.author.fl_str_mv MATZENAUER, RONALDO
MALUF, JAIME RICARDO TAVARES
BUENO, ARISTIDES CÂMARA
dc.subject.por.fl_str_mv agrometeorology, water relations
agrometeorologia, relações hídricas
topic agrometeorology, water relations
agrometeorologia, relações hídricas
description Low water availability is a limiting factor for growth and development of summer crops in Rio Grande do Sul State. Brazil. Studies aiming to determine crop coefficients for water requirements are important for water supply recommendation. The objective o f this study was to determine the maximum evapotranspiration of sunflower (ETm) in relation to the reference evapotranspiration (ETo) and with solar radiation (Rs), to obtain the ratios ETm/ ETo (Kc , coefficient) and ETm/Rs (Kc 2 coefficient), at different crop stages. Field experiments were carried out at Centro de Pesquisa de Fruticultura, in Taquari, 29°48'S latitude, 51°49'W longitude and 76 m of altitude, during 1987/ 88, 1989/90, 1990/91 and 1991/92 crop seasons. The average ratio ETm/ETo for the whole crop cycle (from sowing to physiological maturity) was 0.77, while the average ratio ETm/Rs was 0.48 for the same period. The highest average values of crop coefficients occurred during flowering period with average values of 1.12 and 0.71, respectively, for Kc, and Kc 2 .
publishDate 1999
dc.date.none.fl_str_mv 1999-12-30
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 http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/378/347
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 Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
dc.source.none.fl_str_mv Pesquisa Agropecuária Gaúcha; Vol 5 No 2 (1999): PESQ. AGROP. GAÚCHA; 241-247
Pesquisa Agropecuária Gaúcha; v. 5 n. 2 (1999): PESQ. AGROP. GAÚCHA; 241-247
2595-7686
0104-9070
reponame:Pesquisa Agropecuária Gaúcha (Online)
instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron:SEAPDR
instname_str Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron_str SEAPDR
institution SEAPDR
reponame_str Pesquisa Agropecuária Gaúcha (Online)
collection Pesquisa Agropecuária Gaúcha (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
repository.mail.fl_str_mv pag@agricultura.rs.gov.br||
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