Physiological responses of ‘Arbequina’ olive trees to summer deficit irrigation

Centeno Muñoz, Ana and Gómez del Campo Valcárcel, María (2015). Physiological responses of ‘Arbequina’ olive trees to summer deficit irrigation. "Acta horticulturae" ; ISSN 0567-7572.

Description

Title: Physiological responses of ‘Arbequina’ olive trees to summer deficit irrigation
Author/s:
  • Centeno Muñoz, Ana
  • Gómez del Campo Valcárcel, María
Item Type: Article
Título de Revista/Publicación: Acta horticulturae
Date: 2015
ISSN: 0567-7572
Subjects:
Freetext Keywords: Stomatal conductance, relative extractable water, stem Potencial hídrico, Olea europaea L., déficit de presión de vapor, condiciones atmosféricas
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Most olive growing areas in the Mediterranean region are characterized by scarce water resources, especially in summer. This lack of water negatively affects the physiological development of the plant and thus its productivity. However olive tree seems to be less sensitive to water stress during summer. To evaluate the physiological responses of olive trees to water stress during this period three deficit irrigation treatments were applied. Control trees (CON) were irrigated to maintain the root zone close to field capacity. Two severe water deficit treatments were applied during summer by irrigating 30% CON in July (1st period) in DI-J or in August (2nd period) in DI-A. Moderate water deficit was applied from July to August (1st and 2nd periods) by irrigating 50% CON in DI-JA. Midday stem water potential (Ψs) and stomatal conductance (g) were measured during the irrigation period. Relative extractable water (REW) was determined from soil water content. Vapour pressure deficit (VPD) and ETo were calculated. The irrigation treatments modified g during summer, in response to the different amounts of water applied. When irrigation was reestablished these differences between treatments disappeared, showing a high capacity of the olive tree for a use of water when this is available. In moderate stresses trees (Ψs>-1.5MPa) g was linearly and curvilinearly related to REW and VPD respectively. Only when water atmospheric demand was lower than 5.5 mm•d-1, g was significantly correlated with Ψs.

More information

Item ID: 43472
DC Identifier: http://oa.upm.es/43472/
OAI Identifier: oai:oa.upm.es:43472
Deposited by: Dra. Ana / A. Centeno
Deposited on: 06 Oct 2016 08:21
Last Modified: 06 Oct 2016 08:21
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