Abstract

The study was conducted in the Khordha district of Odisha during the Kharif season of 2014-2019, to see the effect of climate change, especially of temperature on yield, LAI, and yield attributes of Swarna rice variety. Mainly changes in maximum and average temperature i.e (0.5 – 4.0°C) and (0.5 – 3.0°C) respectively through the weather modification window of the DSSAT CERES Rice crop simulation model were tried for the anthesis stage (60-90 DAP) of the crop. The experiment was laid out as a split plot design and replicated three times. The results showed that the yield was decreasing with respect to the increase in temperature after the threshold limit. The interaction of maximum & average temperature with grain yield was significant only for 1st date of sowing and the rest 2nd & 3rd date of sowing showed nonsignificantly. The leaf area index (LAI) interaction with maximum and average temperature did not show signs for only the 2nd date of sowing but in the case of 1stand 3rd date of sowing showed significance. Likewise, the interaction of physiological maturity days with average temperature showed significance for all three dates of sowing, though the comparison between maximum temperature and physiological maturity days showed decreasing order there was no significant relation. The other two yield attributes like the number of panicles/m2 and harvest index also showed decreasing order while interacting with maximum & average temperature but there was no sign.
 

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