EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION

Detalhes bibliográficos
Autor(a) principal: MATZENAUER, RONALDO
Data de Publicação: 1998
Outros Autores: MALUF, JAIME R. TAVARES, BUENOS , 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/492
Resumo: Rio Grande do Sul is a State characterized by climatic variations specially regarding to amount and distribution of rainfall, with frequent periods of low water availability for spring and summer crops. Studies to determine the water relationship with the soil-plant-atmosphere system become very important for the hydric supply recommendation, as well as to help agricultura) planning and agroclimatic zoning. The purpose of this research was to establish the maximum evapotranspiration of sunflower (ETm) and to connect it with Class A Pan evaporation (Eo) to obtain the ratio ETm/Eo (Kc coefficient), at different sub-periods. The field trial was conducted at Centro de Pesquisa de Fruticultura, in Taquari/RS, Brazil, 29° 48'S, 51° 49' W and 76 m of altitude, during four growth seasons: 1987/1988, 1989/90, 1990/91 and 1991/992. The ETm was measured in drainage evapotránspirometers Thomthwaite-Mather typc. The total ETm at the cycle (sowing- physiological maturation) changed from 371.5 mm to 488.5 mm along the four years, with an average of 408.5 mm. The sub- period with highest daily mean consumption was from beginning to end of flowering, with an average of 6.5 mm/day in the four years . The mean values for the ratio ETm/Eo at the cycle ranged from 0.63 to 0.75 with an average in four years of 0.67. The highest values of the ratio ETm/Eo were also observed during the fiowering sub-period, varying from 0.90 to 1.05, with an average of 0.98.
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spelling EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION EVAPOTRANSPIRAÇÃO DA CULTURA DO GIRASSOL E SUA RELAÇÃO COM A EVAPORAÇÃO DO TANQUE CLASSE "A"agrometeorology, water deficit, Helianthus annuus L.agrometeorologia, déficit hídrico, Helianthus annuus L.Rio Grande do Sul is a State characterized by climatic variations specially regarding to amount and distribution of rainfall, with frequent periods of low water availability for spring and summer crops. Studies to determine the water relationship with the soil-plant-atmosphere system become very important for the hydric supply recommendation, as well as to help agricultura) planning and agroclimatic zoning. The purpose of this research was to establish the maximum evapotranspiration of sunflower (ETm) and to connect it with Class A Pan evaporation (Eo) to obtain the ratio ETm/Eo (Kc coefficient), at different sub-periods. The field trial was conducted at Centro de Pesquisa de Fruticultura, in Taquari/RS, Brazil, 29° 48'S, 51° 49' W and 76 m of altitude, during four growth seasons: 1987/1988, 1989/90, 1990/91 and 1991/992. The ETm was measured in drainage evapotránspirometers Thomthwaite-Mather typc. The total ETm at the cycle (sowing- physiological maturation) changed from 371.5 mm to 488.5 mm along the four years, with an average of 408.5 mm. The sub- period with highest daily mean consumption was from beginning to end of flowering, with an average of 6.5 mm/day in the four years . The mean values for the ratio ETm/Eo at the cycle ranged from 0.63 to 0.75 with an average in four years of 0.67. The highest values of the ratio ETm/Eo were also observed during the fiowering sub-period, varying from 0.90 to 1.05, with an average of 0.98. O estado do Rio Grande do Sul caracteriza-se por uma grande variabilidade climática, especialmente com relação à quantidade e distribuição da precipitação pluvial, ocorrendo, com freqüência, períodos de baixa disponibilidade hídrica para as culturas de primavera-verão. Estudos visando a determinação das relações hídricas no sistema solo-planta: atmosfera, assumem destacada importância, com vistas à recomendação de suplementação hídrica e como subsídio em planejamento agrícola e em zoneamento agroclimático. O objetivo deste trabalho foi determinar a evapotranspiração máxima da cultura do girassol (ETm) e relacioná-la com a evaporação do tanque classe A (Eo), para obtenção da razão ETm/Eo (coeficiente Kc), em diferentes subperíodos. O trabalho foi desenvolvido no Centro de Pesquisa de Fruticultura, em Taquari, RS, 29° 48' S, 51° 49' W e 76 m de altitude, durante os anos agrícolas 1987/88, 1989/90, 1990/91 e 1991/92. A ETm foi medida em evapotranspirômetros de drenagem do tipo Thomthwaite-Mather. A ETm total no ciclo (semeadura-maturação fisiológica), variou de 371,5 mm a 488,5 mm, nos quatro anos, com uma média de 408,0 mm. O subperíodo, onde foi verificado maior consumo médio diário, foi o compreendido entre o início e o final da floração, com uma média nos quatro anos, de 6,5 min/ dia. Os valores médios da razão ETm/Eo no ciclo, variaram de 0,63 a 0,75, com média de 0,67 nos quatro anos. Coincidente com o subperíodo de maior consumo de água, foram observados os maiores valores da razão ETm/Eo, variando de 0,90 a 1,05, com um valor médio de 0,98. Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural1998-12-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontextoapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/492Pesquisa Agropecuária Gaúcha; Vol 4 No 2 (1998): PESQ. AGROP. GAÚCHA; 107-112Pesquisa Agropecuária Gaúcha; v. 4 n. 2 (1998): PESQ. AGROP. GAÚCHA; 107-1122595-76860104-9070reponame: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/492/457MATZENAUER, RONALDO MALUF, JAIME R. TAVARES BUENOS , ARISTIDES CÂMARA info:eu-repo/semantics/openAccess2024-04-22T12:04:11Zoai:ojs.revistapag.agricultura.rs.gov.br:article/492Revistahttp://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:2024-04-22T12:04:11Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
EVAPOTRANSPIRAÇÃO DA CULTURA DO GIRASSOL E SUA RELAÇÃO COM A EVAPORAÇÃO DO TANQUE CLASSE "A"
title EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
spellingShingle EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
MATZENAUER, RONALDO
agrometeorology, water deficit, Helianthus annuus L.
agrometeorologia, déficit hídrico, Helianthus annuus L.
title_short EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
title_full EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
title_fullStr EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
title_full_unstemmed EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
title_sort EVAPOTRANSPIRATION OF SUNFLOWER AND ITS RELATIONSHIP WITH CLASS A PAN EVAPORATION
author MATZENAUER, RONALDO
author_facet MATZENAUER, RONALDO
MALUF, JAIME R. TAVARES
BUENOS , ARISTIDES CÂMARA
author_role author
author2 MALUF, JAIME R. TAVARES
BUENOS , ARISTIDES CÂMARA
author2_role author
author
dc.contributor.author.fl_str_mv MATZENAUER, RONALDO
MALUF, JAIME R. TAVARES
BUENOS , ARISTIDES CÂMARA
dc.subject.por.fl_str_mv agrometeorology, water deficit, Helianthus annuus L.
agrometeorologia, déficit hídrico, Helianthus annuus L.
topic agrometeorology, water deficit, Helianthus annuus L.
agrometeorologia, déficit hídrico, Helianthus annuus L.
description Rio Grande do Sul is a State characterized by climatic variations specially regarding to amount and distribution of rainfall, with frequent periods of low water availability for spring and summer crops. Studies to determine the water relationship with the soil-plant-atmosphere system become very important for the hydric supply recommendation, as well as to help agricultura) planning and agroclimatic zoning. The purpose of this research was to establish the maximum evapotranspiration of sunflower (ETm) and to connect it with Class A Pan evaporation (Eo) to obtain the ratio ETm/Eo (Kc coefficient), at different sub-periods. The field trial was conducted at Centro de Pesquisa de Fruticultura, in Taquari/RS, Brazil, 29° 48'S, 51° 49' W and 76 m of altitude, during four growth seasons: 1987/1988, 1989/90, 1990/91 and 1991/992. The ETm was measured in drainage evapotránspirometers Thomthwaite-Mather typc. The total ETm at the cycle (sowing- physiological maturation) changed from 371.5 mm to 488.5 mm along the four years, with an average of 408.5 mm. The sub- period with highest daily mean consumption was from beginning to end of flowering, with an average of 6.5 mm/day in the four years . The mean values for the ratio ETm/Eo at the cycle ranged from 0.63 to 0.75 with an average in four years of 0.67. The highest values of the ratio ETm/Eo were also observed during the fiowering sub-period, varying from 0.90 to 1.05, with an average of 0.98.
publishDate 1998
dc.date.none.fl_str_mv 1998-12-26
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/492
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/492
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/492/457
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 4 No 2 (1998): PESQ. AGROP. GAÚCHA; 107-112
Pesquisa Agropecuária Gaúcha; v. 4 n. 2 (1998): PESQ. AGROP. GAÚCHA; 107-112
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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