|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
16/12/2019 |
Data da última atualização: |
16/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SOBENKO, L. R.; SOUZA, T. T.; GONÇALVES, A. O.; BIANCHINI, V. J. M.; SILVA, E. H. F. M.; SOUZA, L. T.; MARIN, F. R. |
Afiliação: |
LUIZ R. SOBENKO, ESALQ/USP; TAMIRES T. SOUZA, ESALQ/USP; ALEXANDRE ORTEGA GONCALVES, CNPS; VITOR J. M. BIANCHINI, ESALQ/USP; EVANDRO H. F. M. SILVA, ESALQ/USP; LAÍS T. SOUZA, ESALQ/USP; FÁBIO R. MARIN, ESALQ/USP. |
Título: |
Irrigation requirements are lower than those usually prescribed for a maize crop in Southern Brazil. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Experimental Agriculture, v. 55, n. 4, p. 662-671, Aug. 2019. |
DOI: |
10.1017/S0014479718000339 |
Idioma: |
Inglês |
Conteúdo: |
Due to the lack of basic information on water required by maize (Zea mays L.) in Brazil, the large amount of water applied usually exceeds crop requirements, wasting water and energy. In this study, we measured crop evapotranspiration (ETc) as evaporative heat flux from a centre pivot-irrigated maize plantation in Southern Brazil during winter and summer seasons, using the Bowen ratio method to evaluate how the degree of canopy-atmosphere coupling affects crop water needs and irrigation management. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from the Penman-Monteith equation and expressed as the ETc/ETo (Kc) ratio. In this study, the average Kc values obtained were 1.31 and 0.90 for the winter and summer, respectively. Using aerodynamic and canopy resistance measurements, the decoupling factor (Omega) was computed. Omega values tending to zero (0.09 and 0.20 for winter and summer, respectively) showed that strong coupling of maize plants to the atmosphere and sensitivity to high air temperatures, vapour pressure deficits and wind speed caused variations in Kc in relation to ETo ranges. During the experimental period, the Kc value ranged from 0.92 when the ETo exceeded 4 mm d-1 to 1.64 when the ETo was less than 2 mmd-1. |
Thesagro: |
Evapotranspiração; Irrigação; Milho. |
Thesaurus Nal: |
Evapotranspiration; Irrigation; Zea mays subsp. mays. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02134naa a2200277 a 4500 001 2116972 005 2019-12-16 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1017/S0014479718000339$2DOI 100 1 $aSOBENKO, L. R. 245 $aIrrigation requirements are lower than those usually prescribed for a maize crop in Southern Brazil.$h[electronic resource] 260 $c2019 520 $aDue to the lack of basic information on water required by maize (Zea mays L.) in Brazil, the large amount of water applied usually exceeds crop requirements, wasting water and energy. In this study, we measured crop evapotranspiration (ETc) as evaporative heat flux from a centre pivot-irrigated maize plantation in Southern Brazil during winter and summer seasons, using the Bowen ratio method to evaluate how the degree of canopy-atmosphere coupling affects crop water needs and irrigation management. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from the Penman-Monteith equation and expressed as the ETc/ETo (Kc) ratio. In this study, the average Kc values obtained were 1.31 and 0.90 for the winter and summer, respectively. Using aerodynamic and canopy resistance measurements, the decoupling factor (Omega) was computed. Omega values tending to zero (0.09 and 0.20 for winter and summer, respectively) showed that strong coupling of maize plants to the atmosphere and sensitivity to high air temperatures, vapour pressure deficits and wind speed caused variations in Kc in relation to ETo ranges. During the experimental period, the Kc value ranged from 0.92 when the ETo exceeded 4 mm d-1 to 1.64 when the ETo was less than 2 mmd-1. 650 $aEvapotranspiration 650 $aIrrigation 650 $aZea mays subsp. mays 650 $aEvapotranspiração 650 $aIrrigação 650 $aMilho 700 1 $aSOUZA, T. T. 700 1 $aGONÇALVES, A. O. 700 1 $aBIANCHINI, V. J. M. 700 1 $aSILVA, E. H. F. M. 700 1 $aSOUZA, L. T. 700 1 $aMARIN, F. R. 773 $tExperimental Agriculture$gv. 55, n. 4, p. 662-671, Aug. 2019.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Solos (CNPS) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
24/11/2011 |
Data da última atualização: |
24/11/2011 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SOMAVILLA, L.; GOMES, C. B.; CARNEIRO, R. M. D. G. |
Afiliação: |
CESAR BAUER GOMES, CPACT. |
Título: |
Penetração e desenvolvimento de Meloidogyne ethiopica em porta enxertos de videira. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 44., 2011, Bento Gonçalves. [Anais...]. Tropical Plant Pathology, Brasília, v. 36, sup. p. 0427, 2011. |
Idioma: |
Português |
Thesaurus NAL: |
Meloidogyne ethiopica. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00545nam a2200133 a 4500 001 1907032 005 2011-11-24 008 2011 bl uuuu u00u1 u #d 100 1 $aSOMAVILLA, L. 245 $aPenetração e desenvolvimento de Meloidogyne ethiopica em porta enxertos de videira.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 44., 2011, Bento Gonçalves. [Anais...]. Tropical Plant Pathology, Brasília, v. 36, sup. p. 0427$c2011 650 $aMeloidogyne ethiopica 700 1 $aGOMES, C. B. 700 1 $aCARNEIRO, R. M. D. G.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Clima Temperado (CPACT) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|