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Comparison of continuously recorded plant-based water stress indicators for young lemon trees

AuthorsOrtuño Gallud, Mª Fernanda ; Alarcón Cabañero, Juan José ; Nicolás Nicolás, Emilio ; Torrecillas Melendreras, Arturo
Plant water relations
Sap flow
Trunk diameter fluctuations
Issue Date20-May-2005
CitationPlant and Soil 267(1-2): 263-270(2005)
AbstractContinuously recorded plant-based water stress indicators (sap flow and parameters derived from trunk diameter fluctuations) were compared in potted young lemon trees (Citrus limon (L.) Burm. fil, cv. Verna) grafted on sour orange (C. aurantium L.) rootstock submitted to deficit irrigation. Daily maximum (MXTD) and minimum (MNTD) trunk diameters and daily trunk diameter shrinkage (MDS) were directly influenced by the water supply to the trees from the soil. The continuously recorded plant-based water stress indicators presented different degrees of sensitivity when used to estimate the water status of the plants. Sap flow (SF) and MDS were more immediate and sensitive than MXTD and MNTD. However, the higher signal intensity: noise for SF and the fact that its signal intensities remained clearly above unity during the stress period, indicating that the soil water was depleted, point to the greater reliability of this indicator. Also, the possibility of developing further baseline relationships between SF and air vapour pressure deficit in fully irrigated trees in field conditions increases the feasibility of using this parameter in automatic irrigation systems.
Publisher version (URL)http://dx.doi.org/10.1007/s11104-005-0108-3
Appears in Collections:(CEBAS) Artículos
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