Vol. 8, Issue 10 (2019)

Author(s):
R Paikaray, A Baliarsingh, A Nanda, AKB Mohapatra, BS Rath, J Pradhan and G Panigrahi

Abstract:
Potential impacts of climate change on rice production have been estimated in several studies. This study was conducted to assess the impact of climate change on productivity of kharif rice cv. Hasantaa for the year 2030, 2050, 2070 for Ganjam district of Odisha, using four global climate change Representative Concentration Pathway (RCPs) scenarios namely 2.6, 4.5, 6.0 and 8.5. Weather parameters for climate change scenarios include projection of rainfall, maximum temperature, minimum temperature and solar radiation for Ganjam district by using Mark Sim GCM -DSSAT weather file generator. In this study growth, development and yield of four rice cultivars are verified under four different dates of planting. In cv. Hasantaa by increasing the CO₂ concentration combining with increase in rainfall and solar radiation as per RCP scenarios causes increase in yield of kharif rice however, grain yield decreased with increase in temperature of more than 2 ⁰C along with solar radiation more than 3.8 MJ/day. In 2030, there is an increase in yield but in 2050, there is almost no change in yield except for late transplanting date. However, in 2070 no significant changes in yield under early and late transplanting date but declines in midseason transplanting. RCP 8.5 scenario results in declining yield in all transplanting dates in 2070.