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Provedor de dados:  AGRIAMBI
País:  Brazil
Título:  Biophysical controls of evapotranspiration in cowpea cultivation under different water regimes
Autores:  Souza,Daniely F. S. de
Pinto,João V. de N.
Costa,Deborah L. P.
Vieira,Igor C. de O.
Silva,Thieres G. F. da
Souza,Paulo J. de O. P. de
Data:  2019-10-01
Ano:  2019
Palavras-chave:  Vigna unguiculata (L.) Walp
Decoupling factor
Aerodynamic conductance
Stomatal conductance
Resumo:  ABSTRACT The objective of this study was to analyze the variations of the decoupling factor and the aerodynamic and stomatal conductances for cowpea subjected to different levels of water availability during the reproductive phenological stages of the crop. The study was conducted in the municipality of Castanhal located in the northeast of the state of Pará, Brazil, in an area planted with cowpea, in 2013, 2014 and 2015 with four irrigation treatments: T100 - replacement of 100% of the crop evapotranspiration (ETc); T50 - replacement of 50% ETc; T25 - replacement of 25% ETc; and T0 - without any replacement (without irrigation). The interaction between the crop and the atmosphere in water vapor exchange was estimated through the decoupling factor (Ω), which was between 0.5 and 1, except for the treatment without irrigation, indicating a moderate to high decoupling between the crop and the atmosphere, so that the water vapor exchange process was controlled by the energy supply, instead of stomatal control.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Departamento de Engenharia Agrícola - UFCG
Relação:  10.1590/1807-1929/agriambi.v23n10p725-732
Formato:  text/html
Fonte:  Revista Brasileira de Engenharia Agrícola e Ambiental v.23 n.10 2019
Direitos:  info:eu-repo/semantics/openAccess

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