Assessment of Rice Yield Sensitivity to Changing Weather Conditions in Prayagraj Using DSSAT V4.7.5 Crop Simulation Model

The Field experiments were conducted during 2012-19 to determine the effect of changing weather such as (Tmax, Tmin, Tavg, Solar radiation and CO2 concentration) on grain yield, LAI, Anthesis days maturity four rice cultivars i.e (Swarna sub 1, Sarjoo 52, Pant Dhan 4 NDR 359) at college forestry farm , SHUATS Prayagraj. DSSAT-CERES model was calibrated validated, for under Prayagraj conditions it observed that values Percent error, RMSE, nRMSE Pearson correlation coefficient (r) good in agreement within permissible limit. Among all varieties 359 yields more followed by pant dhan 4, Swarna 1 sarjoo-52. result revealed increasing temperature Tavg) variety phenophases yield got reduced but increased condition concentration increased. In case LAI same phenophase flowering stage crop there no found. During interaction between with anthesis found Tmax Tavg. Other parameter has it. aturity significant 5% or 1% level henophases. research outcome indicates that, future farming will be challengeable due climate change, we must prepare suitable management plan tackle situation.