ORYZA Training Program for Basic Applications

13-17 April 2015

IRRI, Philippines


Crop modeling and systems analysis have become important tools in modern agricultural research. The model ORYZA version 3 is a major rice crop model which simulates growth and development of rice in situations of potential production, water- , nitrogen-, and water-and-nitrogen - limitations. ORYZA has been used on: 

  • the optimization of water and nitrogen management for rice; 
  • the effects of water and nitrogen management on rice growth and yield; 
  • the identification of constraining factors following yield determination in site-specific conditions; 
  • the assessment of climate change effects on rice; 
  • the exploration of management options and sustainability of rice-based cropping systems; 
  • the evaluation of varietal performance and the effects of special traits on target environments; and 
  • the germplasm adaptation to climate change. 

Since 2009, Oryza2000 has been modified aimed mainly at abiotic stress and evolved from a rice crop model towards a rice-based cropping model. Several additional functions are currently being developed to enhance its capabilities for above mentioned application studies and also additional functions for severe abiotic stress, interaction of water and nitrogen, and continuous mono-culture rice cropping system.

As the successor of ORYZA2000, the ORYZA version 3 was  released and the Crop Modeling Group of International Rice Research Institute (IRRI) wishes to assist the current and potential ORYZA users during the transition through this short training course. 

Program Goal and Objectives

The overall goal of this training program is to familiarize participants with the basic functionalities and structure of the ORYZA (V3) model, the minimum data requirement, experimental data collection for ORYZA model evaluation, the calibration of parameters, and the use ORYZA on your own dataset. 

Program Highlights 

  • Demonstrate how processes of crop growth and development, water use, uptake of water, and nutrients and carbon dynamics can be simulated.
  • Make extensive use of “hands on” sessions that apply the ORYZA model to field experiments.
  • Describe procedures for collecting and managing crop, experimental, weather, and soil data for model evaluation.
  • Give participants the opportunity to work with their own data and determine the accuracy of the models for application to specific problems.
  • Analyze management alternatives for single seasons or over long-term crop rotations.