Sensitivity analysis to study the effects of temperature, carbon dioxide and solar radiation on sunflower under middle Gujarat Agro climatic region

The input weather parameters which include maximum and minimum temperatures, solar radiation and CO2 were used for sensitivity analysis The maximum and minimum temperatures were increased and decreased from 0.5 to 2.0°C at 0.5 increment level, solar radiation increased and decreased from 1.0 to 3.0 at 1.0 MJ day-1 increment level and CO2 increased from 330 to 530 ppm at 50 ppm increment level to assess the climate change impact on seed yield. [...]the results produced by the models during the present investigation can be used to make appropriate management decisions and to provide farmers and farming community with alternative options for their farming systems. [...]in the present investigation, the simplest approach by assuming a fixed climate change by modifying the data with a constant number, such as an increase considered as super optimum and decrease as sub optimum for maximum and minimum temperature (± 0.5, 1.0, 1.5 and 2.0 °C) and carbon dioxide concentration (± 380, 430, 480 and 530 ppm) was applied to daily weather data, and the crop simulation models were performed to determine the sensitivity of seed yield levels to varying weather variables and climate change impact for these modified inputs for sunflower crop.