Evaluation of the crop growth model WOFOST under irrigation management
2011
Amiri, E., Assistant Professor of Islamic Azad University Lahijan Branch | Rezaei, M., Scientific Member of the Rice Research Institute of Iran | Motamed, M. K., Assistant Professor of Guilan University, Rasht, Iran | Emami, S., M.Sc. Student Guilan University, Rasht, Iran
The model WOFOST, which simulates the growth and development of annual field crops under conditions of potential production, water and nutrient limitations. The model was evaluated against a data set of field experiments. The study was laid out in RCBD with 3 replications for one popular traditional landrace Hashemi carried out in 2005 at Rice Research Institute of Iran, Rasht. The irrigation management were I1 with continuous irrigation while I2, I3, and I4 were irrigation 1, 3 and 5 days after water disappearance of pounded water and I5, I6 were irrigation at 5 and 8 days intervals. We compared simulated and measured leaf area index (LAI) and biomass panicles and total aboveground biomass by adjusted coefficient of correlation (R2), T test of means, absolute and normalized root mean square errors (RMSE) and modeling Efficiency (EF). On average, RMSE of model were 389-553, kg ha-1 for total biomass, 139-246 kg ha-1 for panicle biomass and 0.46-0.58 cm2cm-2 for LAI. For these crop variables, normalized RMSE values were 10-14 for total biomass, 7-16 for panicle biomass, and 54-83 for LAI. The WOFOST model Simulated LAI generally exceeded measured values.
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