Developing ORYZA 1N for Medium- and Long-Duration Rice: Variety Selection under Non-waterstress Conditions
by Dillip Kumar Swain, Srikantha Herath, Burla Chandra Bhaskar, Prameela Krishnan, Kurkuri Srinivasa Rao, Sangram Keshari Nayak, and Rabindra Nath Dash
- The study aims to increase rice production in non-waterstressed rice-growing areas during the wet season in Asia.
- Researchers propose using an appropriate combination of medium- or long-duration rice varieties and nutrient management strategies.
- The ORYZA 1N crop growth simulation model is utilized to select rice varieties and optimize nitrogen (N) management.
- Calibrations of the model are conducted using field experiment data from Cuttack, India.
- Simulated results align well with observed values for medium-duration varieties, but deviate for long-duration varieties.
- The model accurately predicts grain yield, biomass, and leaf area index in the wet season of 2000.
- Late planting is shown to result in a decline in yield according to the model's simulations.
- The study recommends planting the variety Ranjit in favorable lowland areas without water stress during the wet season.
- An application of 80 kg N per hectare in four equal splits at specific growth stages is suggested.
- Technology verification trials showed increased rice yield compared to conventional practices.
