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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
16/02/2009 |
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Data da última atualização: |
15/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RIGHI, E. Z.; ANGELOCCI, L. R.; MARIN, F. R. |
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Afiliação: |
EVANDRO ZANINI RIGHI, PUC-PR; LUIZ ROBERTO ANGELOCCI, Esalq/USP; FABIO RICARDO MARIN, CNPTIA. |
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Título: |
Energy balance of a young drip-irrigated coffee crop in southeast Brazil: an analysis of errors and reliability of measurements by the Bowen ratio method. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Revista Brasileira de Agrometeorologia, Piracicaba, v. 15, n. 3, p. 267-279, 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
The energy balance of a young (one to two year-old), drip irrigated coffee crop in hedgerows configuration was determined using the energy balance-Bowen ratio (EBBR) method, during two periods in the wet season [October?Dezember/2002 (P1) and February?March/2003 (P2)] and two in the dry season [May?July/2003 (P3) and August?September/2003 (P4)], in Piracicaba, São Paulo State, Brazil. An analysis of errors affecting the estimates of latent and sensible heat fluxes was performed. Emphasis was given on determining the reliability of the assumption that Kh=Kw in the EBBR method, in view of the possibility of occurrence of sensible heat advection (regional and or within-row) and on the effect of errors of measurements of the air temperature and vapor pressure through the use of thermocouple psychrometers. The psychrometric errors had a more prevalent effect in the dry periods when the humidity gradients were lower than during the humid periods, leading to a larger discarding of measurement during P3 and P4. In the wet periods, it was deduced that the assumption of Kh=Kw did not introduce a large effect on the estimates of the heat fluxes, but during the dry periods this similarity could not be assumed as a function of advective fluxes. The soil surface water conditions were the main factor that determined the energy partitioning. The latent heat flux represented more than 80% of the available energy (Rn?G) in the wet season, decreasing to 78% in P3 and 64% in P4, the dry periods. However, values obtained during P4 were affected by problems on management of the coffee crop. Weeds growing in the inter-rows affected the energy partitioning mostly during periods with low rainfall. The effect of coffee growth and the weeds on the latent heat flux was masked by the soil humidity inside each studied period. In the early dry period, the effect of inter-row weeds on the latent heat flux was important, because they could have extracted water from deep depths in the soil. MenosThe energy balance of a young (one to two year-old), drip irrigated coffee crop in hedgerows configuration was determined using the energy balance-Bowen ratio (EBBR) method, during two periods in the wet season [October?Dezember/2002 (P1) and February?March/2003 (P2)] and two in the dry season [May?July/2003 (P3) and August?September/2003 (P4)], in Piracicaba, São Paulo State, Brazil. An analysis of errors affecting the estimates of latent and sensible heat fluxes was performed. Emphasis was given on determining the reliability of the assumption that Kh=Kw in the EBBR method, in view of the possibility of occurrence of sensible heat advection (regional and or within-row) and on the effect of errors of measurements of the air temperature and vapor pressure through the use of thermocouple psychrometers. The psychrometric errors had a more prevalent effect in the dry periods when the humidity gradients were lower than during the humid periods, leading to a larger discarding of measurement during P3 and P4. In the wet periods, it was deduced that the assumption of Kh=Kw did not introduce a large effect on the estimates of the heat fluxes, but during the dry periods this similarity could not be assumed as a function of advective fluxes. The soil surface water conditions were the main factor that determined the energy partitioning. The latent heat flux represented more than 80% of the available energy (Rn?G) in the wet season, decreasing to 78% in P3 and 64% in P4, the dry periods... Mostrar Tudo |
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Palavras-Chave: |
Advecção; Calor sensível; Erros de medidas; Fluxo de energia latente; Psicrometria; Psychrometry. |
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Thesagro: |
Balanço de energia; Café; Clima; Irrigação. |
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Thesaurus Nal: |
advection. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02861naa a2200277 a 4500
001 1024586
005 2020-01-15
008 2007 bl uuuu u00u1 u #d
100 1 $aRIGHI, E. Z.
245 $aEnergy balance of a young drip-irrigated coffee crop in southeast Brazil$ban analysis of errors and reliability of measurements by the Bowen ratio method.$h[electronic resource]
260 $c2007
520 $aThe energy balance of a young (one to two year-old), drip irrigated coffee crop in hedgerows configuration was determined using the energy balance-Bowen ratio (EBBR) method, during two periods in the wet season [October?Dezember/2002 (P1) and February?March/2003 (P2)] and two in the dry season [May?July/2003 (P3) and August?September/2003 (P4)], in Piracicaba, São Paulo State, Brazil. An analysis of errors affecting the estimates of latent and sensible heat fluxes was performed. Emphasis was given on determining the reliability of the assumption that Kh=Kw in the EBBR method, in view of the possibility of occurrence of sensible heat advection (regional and or within-row) and on the effect of errors of measurements of the air temperature and vapor pressure through the use of thermocouple psychrometers. The psychrometric errors had a more prevalent effect in the dry periods when the humidity gradients were lower than during the humid periods, leading to a larger discarding of measurement during P3 and P4. In the wet periods, it was deduced that the assumption of Kh=Kw did not introduce a large effect on the estimates of the heat fluxes, but during the dry periods this similarity could not be assumed as a function of advective fluxes. The soil surface water conditions were the main factor that determined the energy partitioning. The latent heat flux represented more than 80% of the available energy (Rn?G) in the wet season, decreasing to 78% in P3 and 64% in P4, the dry periods. However, values obtained during P4 were affected by problems on management of the coffee crop. Weeds growing in the inter-rows affected the energy partitioning mostly during periods with low rainfall. The effect of coffee growth and the weeds on the latent heat flux was masked by the soil humidity inside each studied period. In the early dry period, the effect of inter-row weeds on the latent heat flux was important, because they could have extracted water from deep depths in the soil.
650 $aadvection
650 $aBalanço de energia
650 $aCafé
650 $aClima
650 $aIrrigação
653 $aAdvecção
653 $aCalor sensível
653 $aErros de medidas
653 $aFluxo de energia latente
653 $aPsicrometria
653 $aPsychrometry
700 1 $aANGELOCCI, L. R.
700 1 $aMARIN, F. R.
773 $tRevista Brasileira de Agrometeorologia, Piracicaba$gv. 15, n. 3, p. 267-279, 2007.
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Embrapa Agricultura Digital (CNPTIA) |
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| 1. |  | PEREIRA, E. M.; HELM, C. V. Atividade enzimática de celulases de Pleorotus pulmonarius cultivado em pupunha. In: EVENTO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA FLORESTAS, 12., 2013, Colombo. Anais. Colombo: Embrapa Florestas, 2013. (Embrapa Florestas. Documentos, 253). Editores técnicos: Marcílio José Thomazini, Elenice Fritzsons, Patrícia Raquel Silva, Guilherme Schnell e Schuhli, Denise Jeton Cardoso, Luziane Franciscon. EVINCI. Resumos.| Tipo: Resumo em Anais de Congresso |
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| 2. | | PEREIRA, E. M.; ARAÚJO, M. V.; MAGARELLI, G.; FERREIRA, D. N. M. Ácaros detectados na estação Quarentenária de Germoplasma Vegetal, Embrapa Recursos Genéticos e Biotecnologia. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 14., 2009, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2009. Resumo 125. p. 177| Tipo: Resumo em Anais de Congresso |
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| 3. | | FERREIRA, D. N. M.; ROCHA, H. M. C.; PEREIRA, E. M.; ROCHA, D. A.; MAGARELLI, G. Ácaros interceptados na Estação Quarentenária de Germoplasma Vegetal, Embrapa Recursos Genéticos e Bioteconologia, de 2008 a 2010. In: SIMPÓSIO BRASILEIRO DE ACAROLOGIA, 3., 2011, Campinas. [Resumos...]. Campinas: Instituto Biológico, 2011.| Tipo: Resumo em Anais de Congresso |
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| 4. | | ROCHA, D. A.; PEREIRA, E. M.; MAGARELLI, G.; FERREIRA, D. N. M. Ácaros interceptados na Estação Quarentenária de Germoplasma Vegetal da Embrapa Recursos Genéticos e Bioteconologia no período de agosto de 2009 a setembro de 2010. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 15., 2010, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2010. Resumo 116. p. 166| Tipo: Sistema de Produção |
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| 5. | | ARAÚJO, M. V.; PEREIRA, E. M.; FERREIRA, V. A.; SILVA, M. L. da; BENITO, N. P. Coleção entomológica de referência do Núcleo Temático de Segurança Biológica da Embrapa Recursos Genéticos e Biotecnologia. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 14., 2009, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2009. Resumo 127. p. 179| Tipo: Resumo em Anais de Congresso |
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| 6. | | ALCANTARA, S. de; PEREZ, D. V.; MENEGHELI, N.; PEREIRA, E. M.; BOEIRA, R. C. Efecto del uso del lodo generado en el tratamiento de las aguas negras en la acumulación de Fe, Mn, Ni, Zn, Cu e Cr en suelos brasileños. CONGRESO INTERNACIONAL DE QUÍMICA E INGENIERÍA QUÍMICA= INTERNATIONAL CONGRESS ON CHEMISTRY AND CHEMICAL ENGINEERING, 5., 2004, La Habana. Memorias... La Habana: Sociedad Cubana de Química, 2004. 1 CD ROM.| Tipo: Artigo em Anais de Congresso |
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| 7. | | PEREIRA, E. M.; ARAÚJO, M. V.; MAGARELLI, G.; BENITO, N. P. Inspeção e identificação entomológica realizada pela Estação Quarentenária de Germoplasma Vegetal. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 14., 2009, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2009. Resumo 135. p. 187| Tipo: Resumo em Anais de Congresso |
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| 8. | | ALCANTARA, S. de; PEREIRA, E. M.; WASSERMAN, M. A.; PEREZ, D. V.; BOEIRA, R. C.; GALVAO, J. A. H. Efeito da aplicação de lodo de esgoto na especiação por extração seqüencial do solo. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 29., 2003, Ribeirão Preto. Solo: alicerce dos sistemas de produção. Botucatu: Unesp, 2003.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
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| Registros recuperados : 10 | |
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