Ecology, Environment and Conservation Paper

VALIDATION OF THE ORYZA 2000 MODEL TO SIMULATING RICE YIELDS UNDER INTERVAL IRRIGATION

R. Jenabi, E. Pazira, E. Amiri and H. Babazadeh

Abstract

The ORYZA2000 model was tested in Iran for simulating the response of two rice genotypes to water management. Study was carried out in a Randomized Complete Block Design between 2012 and 2013, with 3 replications at Rice Research Institute of Iran, Rasht. Irrigation management (4 regimes) was the main plot and rice genotypes was the sup-plot. Evaluation simulated and measured final biomass and yield, by adjusted coefficient of correlation; T test of means; and by absolute and normalized root mean square errors (RMSE). Results show, with normalized root mean square errors (RMSEn) of 6–10%, ORYZA2000 satisfactorily simulated final biomass and yield. Grain yields and biomass of genotypes rice were adequately simulated by the model (differences between simulated values and observations were less than 10%).