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http://dx.doi.org/10.5532/KJAFM.2017.19.4.270

Development of a Gridded Simulation Support System for Rice Growth Based on the ORYZA2000 Model  

Hyun, Shinwoo (Department of Plant Science, Seoul National University)
Yoo, Byoung Hyun (Department of Plant Science, Seoul National University)
Park, Jinyu (Research Institute of Agriculture and Life Sciences, Seoul National University)
Kim, Kwang Soo (Department of Plant Science, Seoul National University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.19, no.4, 2017 , pp. 270-279 More about this Journal
Abstract
Regional assessment of crop productivity using a gridded simulation approach could aid policy making and crop management. Still, little effort has been made to develop the systems that allows gridded simulations of crop growth using ORYZA 2000 model, which has been used for predicting rice yield in Korea. The objectives of this study were to develop a series of data processing modules for creating input data files, running the crop model, and aggregating output files in a region of interest using gridded data files. These modules were implemented using C++ and R to make the best use of the features provided by these programming languages. In a case study, 13000 input files in a plain text format were prepared using daily gridded weather data that had spatial resolution of 1km and 12.5 km for the period of 2001-2010. Using the text files as inputs to ORYZA2000 model, crop yield simulations were performed for each grid cell using a scenario of crop management practices. After output files were created for grid cells that represent a paddy rice field in South Korea, each output file was aggregated into an output file in the netCDF format. It was found that the spatial pattern of crop yield was relatively similar to actual distribution of yields in Korea, although there were biases of crop yield depending on regions. It seemed that those differences resulted from uncertainties incurred in input data, e.g., transplanting date, cultivar in an area, as well as weather data. Our results indicated that a set of tools developed in this study would be useful for gridded simulation of different crop models. In the further study, it would be worthwhile to take into account compatibility to a modeling interface library for integrated simulation of an agricultural ecosystem.
Keywords
Rice yield; ORYZA2000; Gridded simulation; Input data; Output data;
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Times Cited By KSCI : 3  (Citation Analysis)
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