Summary:
Published in Canadian Journal of Forest Research 19: 575-579
A soil water budget was established to estimate the water loss from the 0- to 60-cm layer as a result of evapotranspiration in a forest tree nursery. Estimated evapotranspiration totaled 69% of potential evapotranspiration (as estimated by the Penman equation) for 36 selected periods from May 15 to July 30, 1975. The root zone (0- to 15-cm layer) supplied 58% of the total evapotranspired water from the soil profile. Evapotranspiration from this layer was found to be a good predictor of total water loss. Evapotranspiration from the root zone, expressed as a percentage of potential evapotranspiration, was related to soil water tension at 3 cm depth. This relationship, combined with a knowledge of soil hydrodynamic properties, can be used to estimate evapotranspiration from the 0- to 60-cm soil profile, which in turn can be used to predict irrigation needs. For practical purposes, a relationship using net radiation instead of potential evapotranspiration can also be used. Depending on the available information, either of these two relationships may be used for irrigation planning.
Sector(s):
Forests
Catégorie(s):
Scientific Article
Theme(s):
Forestry Research, Forests, Seeds and Forest Seedlings Production
Departmental author(s):
Author(s):
PRÉVOST, Marcel, Jean STEIN and André P. PLAMONDON
Year of publication:
1989
Format:
Paper
How to get the publication:
Keyword(s):
nursery, evapotranspiration, soil water budget, root, irrigation, soil water potential, soil water tension, seeds and forest seedlings production, production de semences et de plants, production de plants, pépinière, évapotranspiration, bilan de l'eau du sol, racine, irrigation, potentiel de l'eau du sol, tension de l'eau du sol