Evaluation of components of energy balance in banana crop during the first year

• Autor(es):

  Teixeira, Antônio H. de C. (Embrapa Semi-Árido).

• Fonte:

  Revista Brasileira de Engenharia Agrícola e Ambiental; volume 5, número 1, páginas 28-32. Abril 2001.

• Assuntos:

  Musa sp.;

  latent heat flux;

  sensible heat flux;

  soil heat flux;

  net radiation.

• Resumo:

  Data of net radiation, soil heat flux, temperature and vapor pressure gradients, collected at Agrometeorology Experiment Station of Embrapa Semi-árido, at Petrolina, PE, Brazil, were used to evaluate the diurnal and seasonal beheavior of energy balance throughout the phenological phases of the banana crop in the first production cycle, irrigated by microaspersion. On average, the net radiation was 63% of the global solar radiation. The Bowen ratio was used to measure the latent and sensible fluxes. The higher portion of net radiation was utilized as latent heat flux (87%), followed by soil heat flux (11%) and by sensible heat flux (2%). The lower value of net radiation used as sensible heat flux may be because of the nearness of the São Francisco river that promoted humidity advection to the crop.

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