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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
08/09/1995 |
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Data da última atualização: |
18/04/2023 |
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Autoria: |
SAN JOSE, J. J.; BERRADE, F. |
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Afiliação: |
Centro de Ecologia, Instituto Venezolano de Investigaciones Cientificas, Apartado 1827, Caracas 1010-A Venezuela. |
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Título: |
Transfer of mass and energy in a cassava (Manihot esculenta Crantz cv. Cubana) Community 1. microlimate and water vapour exchange in a savanna climate. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Annals of Botany, v.52, p.507-520, 1983. |
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Idioma: |
Inglês |
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Conteúdo: |
The energy balance approach was used to evaluate the transfer processes which occur between a cassava community, growing during a savanna wet season, and its environment. Crop performance under these conditions was also analysed. During this season, the soil profile remained near saturation, hence net radiation absorbed by the cassava crop during typical low radiation days, mainly dissipated as latent heat (78-86pr cent); a process which depends on the growth state and on the foliage cover of the canopy. However, the seasonal root environment, with a sufficient water supply, contrasted with the extremely variable shoot environment, because the daily flux density of short wave radiation input reached values similar to those reported for typical dry season days.On these days, cassava responded to environmental stress by a reduction in transpiration. At the end of the wet season soil water content markedly decreased, an additional stress factor on the roots, which produced a notable reduction of cassava leaf area ondex. Therefore, the moderate changes in energy partitioning determined by morphological and physiological adaptive responses of cassava, produce a hindrance in the equilibrium between water vapour transfer and the surrounding savanna environment. |
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Palavras-Chave: |
Heat fluxes; Manihot esculenta Crantz. |
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Thesaurus Nal: |
cassava; energy balance; microclimate. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01895naa a2200193 a 4500
001 1647007
005 2023-04-18
008 1983 bl uuuu u00u1 u #d
100 1 $aSAN JOSE, J. J.
245 $aTransfer of mass and energy in a cassava (Manihot esculenta Crantz cv. Cubana) Community 1. microlimate and water vapour exchange in a savanna climate.$h[electronic resource]
260 $c1983
520 $aThe energy balance approach was used to evaluate the transfer processes which occur between a cassava community, growing during a savanna wet season, and its environment. Crop performance under these conditions was also analysed. During this season, the soil profile remained near saturation, hence net radiation absorbed by the cassava crop during typical low radiation days, mainly dissipated as latent heat (78-86pr cent); a process which depends on the growth state and on the foliage cover of the canopy. However, the seasonal root environment, with a sufficient water supply, contrasted with the extremely variable shoot environment, because the daily flux density of short wave radiation input reached values similar to those reported for typical dry season days.On these days, cassava responded to environmental stress by a reduction in transpiration. At the end of the wet season soil water content markedly decreased, an additional stress factor on the roots, which produced a notable reduction of cassava leaf area ondex. Therefore, the moderate changes in energy partitioning determined by morphological and physiological adaptive responses of cassava, produce a hindrance in the equilibrium between water vapour transfer and the surrounding savanna environment.
650 $acassava
650 $aenergy balance
650 $amicroclimate
653 $aHeat fluxes
653 $aManihot esculenta Crantz
700 1 $aBERRADE, F.
773 $tAnnals of Botany$gv.52, p.507-520, 1983.
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