calibration of crop system model for growth simulation and yield estimation of canola

abstract the propose of this study was evaluation of cropsyst model on growth simulation and yield stimation of canola under different irrigation treatments. canola (talaye) was sown under 5 treatment and 4 replicants in completed randomized block designs at the college of agriculture, shiraz universityduring 2007-2008. during the growth season dry mass and lai was meseaured frequently, then model was calibrated by the resukts. obtained results showed very good esyimation by the simulation model, as the correlation coefficient square between dry mass and lai in defferent treatments were more than 0.99 and 0.95, respectively. also correlation coeficient between meseaured and simulated crop yeild was 0.96, that shows the accuracy of model in simulation on crop parameter. also the model was valuated by independent data. obtained results showed the accuracy of model simulation in dry matter as the correlation cofficient was achieved 0.9. also lai simulation in all treatments had good reults, as generaly is reliable in canola investigations.