The influence of plant height and leaf area on the process of real evapotranspiration of barley

During modelling the process of real evapotranspiration in basins used for agricultural purposes, there is a problem of differentiation of evapotranspiration value among the plants growing in a basin. Most of the time it is assumed, that meteorological factors (temperature, water vapour pressure, wind speed and sunshine duration) within a basin are the same and actually the only factors differing evopotranspiration among plants cultivated in basins are the plant height and the area of its foliage. These two factors were put by the author of this paper into the Shuttleworth-Wallace formula as function considering, this way, continuous growth of a plant and its leaf area.

Przy modelowaniu procesu ewapotranspiracji rzeczywistej jęczmienia uwzględnia się dwa czynniki, które wpływają na wielkość ewapotranspiracji roślin uprawianych w zlewni użytkowanej rolniczo. Są to wysokość rośliny i powierzchnia jej listowia. Do modelu wprowadza się je w postaci funkcji logistycznych.