ESTIMATION OF REFERENCE EVAPOTRANSPIRATION USING REDUCED EVAPORATION PAN

Elena Grancharova, Galina Patamanska, Antoaneta Gigova, Ivan Mortev, Elena Dimitrova

Abstract


One of the most popular methods for determining reference evapotranspiration is by evaporation pan because of its easy application. The traditional Class A pan occupies a considerable area, so alternative solutions are sought. The use of a reduced pan is appropriate for greenhouse cultivation because of the smaller area occupied. A two-year experiment was conducted in a greenhouse in the period 2017-2018. The values of the reference evapotranspiration obtained by measuring the evaporation with a Class A pan and a reduced pan with a diameter of 60.35 cm were compared. Using regression analysis, a strong relationship (R2 = 0.92) between the compared values was obtained. The results show that a reduced size evaporator can be used to plan irrigation in a greenhouse.

Keywords


irrigation, evapotranspiration, pan

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References


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New knowledge Journal of science is financed by the National Science Fund of the Republic of Bulgaria - contract № КП-06-НП1/5 of 17.12.2019 in the competition of Bulgarian scientific periodicals – 2019

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