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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
18/03/2019 |
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Data da última atualização: |
08/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, E. H. F. M. da; GONÇALVES, A. O.; PEREIRA, R. A.; FATTORI JÚNIOR, I. M.; SOBENKO, L. R.; MARIN, F. R. |
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Afiliação: |
EVANDRO HENRIQUE FIGUEIREDO MOURA DA SILVA, USP/ESALQ; ALEXANDRE ORTEGA GONCALVES, CNPS; RODOLFO A. PEREIRA, USP/ESALQ; IZAEL MARTINS FATTORI JÚNIOR, USP/ESALQ; LUIZ RICARDO SOBENKO, USP/ESALQ; FÁBIO RICARDO MARIN, USP/ESALQ. |
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Título: |
Soybean irrigation requirements and canopy-atmosphere coupling in Southern Brazil. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Agricultural Water Management, v. 218, p. 1-7, Jun. 2019. |
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DOI: |
10.1016/j.agwat.2019.03.003 |
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Idioma: |
Inglês |
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Conteúdo: |
The lack of base information on crop water requirements under tropical conditions is one of the causes for inefficient water use and inadequate irrigation management. The crop coefficient (Kc) approach is universally adopted for scheduling and quantifying the water management and, recently, its relation with the evaporative atmosphere demand has been included in this approach to improve the decision-making on irrigation management. In this paper, we measured crop evapotranspiration (ETc) in two experiments as evaporative heat flux from a centre pivot-irrigated soybean plantations in tropical Brazil to quantify the crop water needs. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from FAO-56 (Allen et al., 1998). In this study, the average Kc value obtained was 0.92, which is nearly 20% lower than those recommended by the FAO-56 (Allen et al., 1998) and varied inversely as a function of ETo. Based on aerodynamic and leaf diffusive resistance (rs) data, Omega was computed and presented values relatively high compared to other crops, which means a relatively poor coupling of soybean canopies to the atmosphere. Throughout both experiments, the Kc value decreased by up to 44.8% when the ETo increased from 2 to 4 mm d-1, depending on the phenological phase, indicating the need for taking into account the ETo values when selection the Kc values for improving the irrigation management in tropical soybean. |
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Palavras-Chave: |
Acoplamento dossel-atmosfera; Coeficiente de colheita; Condutância foliar; Uso da água. |
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Thesagro: |
Colheita; Manejo de Água. |
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Thesaurus Nal: |
Couplings; Crop coefficient; Leaf conductance. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02384naa a2200301 a 4500
001 2107159
005 2019-11-08
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1016/j.agwat.2019.03.003$2DOI
100 1 $aSILVA, E. H. F. M. da
245 $aSoybean irrigation requirements and canopy-atmosphere coupling in Southern Brazil.$h[electronic resource]
260 $c2019
520 $aThe lack of base information on crop water requirements under tropical conditions is one of the causes for inefficient water use and inadequate irrigation management. The crop coefficient (Kc) approach is universally adopted for scheduling and quantifying the water management and, recently, its relation with the evaporative atmosphere demand has been included in this approach to improve the decision-making on irrigation management. In this paper, we measured crop evapotranspiration (ETc) in two experiments as evaporative heat flux from a centre pivot-irrigated soybean plantations in tropical Brazil to quantify the crop water needs. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from FAO-56 (Allen et al., 1998). In this study, the average Kc value obtained was 0.92, which is nearly 20% lower than those recommended by the FAO-56 (Allen et al., 1998) and varied inversely as a function of ETo. Based on aerodynamic and leaf diffusive resistance (rs) data, Omega was computed and presented values relatively high compared to other crops, which means a relatively poor coupling of soybean canopies to the atmosphere. Throughout both experiments, the Kc value decreased by up to 44.8% when the ETo increased from 2 to 4 mm d-1, depending on the phenological phase, indicating the need for taking into account the ETo values when selection the Kc values for improving the irrigation management in tropical soybean.
650 $aCouplings
650 $aCrop coefficient
650 $aLeaf conductance
650 $aColheita
650 $aManejo de Água
653 $aAcoplamento dossel-atmosfera
653 $aCoeficiente de colheita
653 $aCondutância foliar
653 $aUso da água
700 1 $aGONÇALVES, A. O.
700 1 $aPEREIRA, R. A.
700 1 $aFATTORI JÚNIOR, I. M.
700 1 $aSOBENKO, L. R.
700 1 $aMARIN, F. R.
773 $tAgricultural Water Management$gv. 218, p. 1-7, Jun. 2019.
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Embrapa Solos (CNPS) |
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| Registros recuperados : 3 | |
| 3. |  | GONÇALVES, A. O.; SILVA, E. H. F. M. da; GASPAROTTO, L. G.; ROSA, J. M.; CARMO, S. do; FATTORI JÚNIOR, I. M.; MARIN, F. R. Improving indirect measurements of the leaf area index using canopy height. Pesquisa Agropecuária Brasileira, v. 55, e01894, 2020. Título em português: Melhoria das medições indiretas do índice de área foliar com uso da altura do dossel.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Solos; Embrapa Unidades Centrais. |
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| Registros recuperados : 3 | |
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