Articles
SAP FLOW MEASUREMENTS IN TRUNKS OF EUCALYPTUS GLOBULUS UNDER ATLANTIC CLIMATIC CONDITIONS
Article number
846_9
Pages
105 – 112
Language
English
Abstract
Sap flow velocities were measured in three Eucalyptus globulus trees in Northwest Spain using the Granier method from 20/2/2008 to 26/9/2008. A drift in the values of 
Tmax was observed, thus the estimation of this parameter was made using a linear regression equation with the day of the year, DDA. The daily average values of sap flow velocities were between 3.1502110-6 and 5.57710-5 m3 s-1 m-2 with an average value of 1.6697510-5 m3 s-1 m-2. In the days with high transpiration values some probes had a reduction in the sap flow density value when Vapour Pressure Deficit (VPD) values were high.
Soil water content was measured from 0 to 120 cm depth by Frequency Domain Reflectometry (FDR) device.
Soil water withdrawal assessed by FDR was in accordance with transpiration data obtained from sap flow density.
Tmax was observed, thus the estimation of this parameter was made using a linear regression equation with the day of the year, DDA. The daily average values of sap flow velocities were between 3.1502110-6 and 5.57710-5 m3 s-1 m-2 with an average value of 1.6697510-5 m3 s-1 m-2. In the days with high transpiration values some probes had a reduction in the sap flow density value when Vapour Pressure Deficit (VPD) values were high.Soil water content was measured from 0 to 120 cm depth by Frequency Domain Reflectometry (FDR) device.
Soil water withdrawal assessed by FDR was in accordance with transpiration data obtained from sap flow density.
Publication
Authors
J. Dafonte, G.M. Siqueira, J.M. Mirás, R. Mestas, A. Paz
Keywords
Granier method, no flux temperature estimation, soil water content
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