Evaluation of rice growth model 'ORYZA2000' under nitrogen limited conditions in irrigated environment

摘要

Rice (Oryza saliva L.) is grown in wide range of locations and climatic conditions under a different variety of hydrologic, cultural and seasonal regimes around the world. Simulation modeling is one of the most powerful tools for analyzing interactions in the soil, plant and atmosphere systems. ORYZA 2000 is a crop growth model for lowland rice (Oryza saliva L.) developed by the International Rice Research Institute and Wageningen University. This model has been evaluated extensively in a wide rangeof environments. Experiment was carried out for Evaluation of rice growth model ORYZA2000 under nitrogen limited conditions in irrigated environment. Experiment was laid out in randomized block design (RBP) with six nitrogen levels replicated four times.In this study, ORYZA2000 was calibrated and evaluated using data from field experiment of lowland rice. Crop growth parameters i.e. leaf area index, dry biomass were generated and calibrated at variable nitrogen conditions using ORYZA2000 rice model andwas evaluated by RMSE, normalized RMSE and correlation coefficient. The experiment was carried out with BPT5204 rice cultivar growing under irrigated condition.