International Journal of Biometeorology

, Volume 12, Issue 1, pp 11–14 | Cite as

The black Bellani-type atmometer as an instrument to estimate the evapotranspiration of crop plants

  • A. C. Carder
Article
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Abstract

Comparisons of water loss from black Bellani plate atmometers with soil moisture use by crop plants in the field showed that the instrument gave but a very approximate measure of evapotranspiration. Close collation was obtained only when the foliage of the crop was frequently wetted by rain and adequate supplies of moisture were available to the roots.

Keywords

Soil Moisture Plant Physiology Water Loss Crop Plant Environmental Medicine 
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Zusammenfassung

Vergleiche des Wasserverlusts eines Messgeräts schwarzer Platten nach Bellani für den Verbrauch an Bodenfeuchte bei Getreidepflanzen auf dem Feld zeigten, dass das Instrument nur ein sehr angenähertes Mass für die Verdunstungsmenge gab. Ein besseres Ergebnis wurde nur erreicht, wenn die Blätter der Pflanze häufig durch Regen befeuchtet wurden und vergleichbare Feuchtigkeitsmengen an den Wurzeln vorhanden waren.

Resume

Des comparaisons faites entre les pertes d'eau d'un atmomètre noir de Bellani d'une part et l'utilisation de l'eau du sol par un champ de céréales d'autre part montrent que le dit instrument ne donne qu'une valeur très approximative de l'évapotranspiration. Un rapport étroit ne fut obtenu que si les feuilles des plantes étaient souvent mouillées par de la pluie et que le ravitaillement en eau était suffisant au niveau des racines.

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References

  1. CARDER, A.C. (1960): Atmometer assemblies, a comparison. Can.J.Plant Sci.,40: 700–706.Google Scholar
  2. CARDER, A.C. and HENNIG, A.M.F. (1965): Soil moisture regimes under summerfallow, wheat and red fescue in the upper Peace River region. Agric.Meteor., 3: 311–331.Google Scholar
  3. ROBERTSON, G.W. (1954): Latent evaporation: Its concept, measurement and application. Processed Bull.Can.Dept.Agr., Ottawa, 18 pp.Google Scholar
  4. ROBERTSON, G.W. and HOLMES, R.M. (1959): Estimating irrigation water requirements from meteorological data. Publ. 1054, Can.Dept.Agr., Ottawa, 11 pp.Google Scholar

Copyright information

© N.V. Swets & Zeitlinger 1968

Authors and Affiliations

  • A. C. Carder
    • 1
  1. 1.Research Station Canada Department of AgricultureBeaverlodgeCanada

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