Evaluation of the CERES-Rice for the rice variety IRGA 424 in Rio Grande do Sul
Keywords:DSSAT, Productivity, Calibration, Genetic coefficients
AbstractThe objective of this paper was to calibrate and validate the CERES-Rice model in relation to the productivity estimate for the cultivar IRGA 424 in Rio Grande do Sul, using only information found in the literature. CERES-Rice is a model that simulates the development and productivity of a cultivar. To achieve this goal, it is necessary to obtain the genetic coefficients of the cultivar through the calibration process. The genetic coefficients describe the behavior of the plant in the soil-plant-atmosphere system. The GENCALC module present in the DSSAT was used for the calibration. After the calibration process with 30% of the assembled experiments, the validation was performed in the others. The results for productivity were considered acceptable, since most of the values were below 15%, only one of the results showed an error of 16,88%. Note that the model did not consider neither phenological stages nor fertilization or water issues in the calibration and validation process.
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