Er-Raki S., Khabba S., Erraji T., Ezzahar J., Jarlan Lionel, Le Page M., Chehbouni Abdelghani, Hanich L. (2012). Evaluation of the sap flow measurements determined with heat balance method for citrus orchards in semi-arid region. In :
Sebastiani L. (ed.), Tognetti R. (ed.), Motisi A. (ed.). Proceedings of the VIIIth international workshop on sap flow. Leuven : ISHS, p. 259-267. (Acta Horticulturae ; 951). International Workshop on Sap Flow, 8., Volterra (ITA), 2011/05/08-12.
Titre du document
Evaluation of the sap flow measurements determined with heat balance method for citrus orchards in semi-arid region
Année de publication
2012
Type de document
Colloque
Auteurs
Er-Raki S., Khabba S., Erraji T., Ezzahar J., Jarlan Lionel, Le Page M., Chehbouni Abdelghani, Hanich L.
In
Sebastiani L. (ed.), Tognetti R. (ed.), Motisi A. (ed.), Proceedings of the VIIIth international workshop on sap flow
Source
Leuven : ISHS, 2012,
p. 259-267 (Acta Horticulturae ; 951).
Colloque
International Workshop on Sap Flow, 8., Volterra (ITA), 2011/05/08-12
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.
Plan de classement
Etude du bilan hydrique et ses applications au suivi hydrique ry-farming et pilotage de l'irrigation [072AGRMET02]
;
Irrigation / Drainage [076AGRO09]
Descripteurs
EVAPOTRANSPIRATION ; CULTURE IRRIGUEE ; IRRIGATION ; VERGER ; METHODE D'ANALYSE ; ETUDE COMPARATIVE ; FLUX DE SEVE ; CHALEUR ; BRANCHE
Description Géographique
MAROC ; ZONE SEMIARIDE
Localisation
Fonds IRD [F B010060188]
Identifiant IRD
fdi:010060188
