ISHS Acta Horticulturae 449: II International Symposium on Irrigation of Horticultural Crops
POSSIBILITY OF USING REFERENCE EVAPOTRANSPIRATION ESTIMATED BY METEOROLOGICAL FORMULAS FOR WATER BALANCE CALCULATIONS IN APPLE ORCHARDS: A PRELIMINARY STUDY |
| Authors: | G. Toller, F. Turri, F. Bigaran, L. Pedron |
| Keywords: | Penman-Monteith, Penman, Hargreaves, Blaney-Criddle, TDR |
| Abstract:
In an apple-growing alpine zone of NE Italy the possibility of keeping a soil water balance was tested, replacing the presently used class “A” pan with reference evapotranspiration estimates based on both complex and simplified meteorological formulas. Penman-Monteith, FAO Penman, Hargreaves-Samani and FAO Blaney-Criddle formulas were adopted, directly using the results of all of them in the water balance algorithm. Regression lines were calculated on 11 years of historical meteorological data between Penman-Monteith estimates and the other formulas, thereby testing the possibility of linear transformations to better approximate the results of other formulas closer to Penman-Monteith. Weekly TDR soil moisture measurements were formed to validate the outputs of the balance model. | |
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