Er-Raki S. auteur aut IRD Khabba S. auteur aut IRD Erraji T. auteur aut IRD Ezzahar J. auteur aut IRD Jarlan Lionel auteur aut IRD Le Page M. auteur aut IRD Chehbouni Abdelghani auteur aut IRD Hanich L. auteur aut IRD text conferencePaper eng text/pdf born digital access Sap flow measurements based on heat balance method gives a direct measurement of the mass flow rate of sap in the stem. However, extrapolation of these measurements from the stem to the field scale is an important challenge. In this study, 15 branches of citrus trees with different diameters were equipped with Dynamax sap flow gauge. These individual branch measurements have been after extrapolated to the canopy transpiration by using two up-scaling methods. The first one uses the relationship between sap flow and branches diameter and the second one uses the distribution of the branch diameter in the orchards. The results showed a good agreement between the two methods estimates (R2=0.95). A comparison between scaled-up transpiration from sap flow and measured evapotranspiration (ETed) by eddy covariance showed an average daily difference of about 0.87 mm/day which represents 25% of ETed. This substantial amount of water was lost through soil evaporation and part of it could be saved by improving the drip irrigation management. specialized EVAPOTRANSPIRATION CULTURE IRRIGUEE IRRIGATION VERGER METHODE D'ANALYSE ETUDE COMPARATIVE FLUX DE SEVE CHALEUR BRANCHE MAROC ZONE SEMIARIDE 076AGRO09 072AGRMET02 International Workshop on Sap Flow, 8., Volterra (ITA), 2011/05/08-12 951 259-267 Sebastiani L. ed. edt IRD Tognetti R. ed. edt IRD Motisi A. ed. edt IRD Leuven ISHS 2012 https://www.documentation.ird.fr/hor/fdi:010060188 [F B010060188] https://www.documentation.ird.fr/hor/fdi:010060188 https://www.documentation.ird.fr/intranet/publi/depot/2013-11-28/010060188.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2013-11-28 2014-04-28 fdi:010060188 fre