Ammar Abbas.(1)*
(1). Research Center of Latakia, General commission for scientific agriculture research, Syria.
(*Corresponding author: Dr. Ammar Abbas, E-mail. ammarabbas1984@hotmail.com).
Received:25/08/2023 Accepted: 31/12/2023
Abstract:
The research was carried out based on the daily climatic data of Al-Basil Airport station in Lattakia Governorate during the period 2000-2016 and it included both maximum and minimum temperatures, average relative humidity, wind speed, and solar radiation in order to estimate the values of evapotranspiration (ET0) during the different phonological stages of wheat crop ( Germination, tillering, stem elongation, flowering, seed formation, maturity) using the ET0 Calculator model, which is based on the Benman-Monteith equation modified according to the publications of (FAO n56). Due to the large number of parameters required for the accuracy of the model, which may not be available in some cases, the values calculated by the model have been compared with the values resulting from experimental equations that need less number of inputs, the two experimental equations (Hargreaves and Evanov) were adopted. The correlation coefficient was determined between the values of the model and the values of the equations for each phonological stage of wheat crop. The results indicated the accuracy of the ET0 Calculator model, and the values of the correlation coefficient between the model and Evanov equation values were the highest in different growth stages compared to the Hargreaves equation
Keywords: evapotranspiration, model, correlation coefficient, ET0 Calculator, Evanov equation
Full paper in Arabic: PDF