Vol. 5, Issue 4 (2017)

A field experiment was conducted at Department of Agronomy, College of Agriculture, Dr. B.S. Konkan Krishi Vidyapeeth (Agricultural University), Dapoli, Maharashtra, India during rainy season of 2013 and 2014 to examine effect of weather on yield of different rice varieties under Konkan climatic condition of Maharashtra state. The experiment was laid out in split plot design with three main plot treatments consisting sowing times and nine sub plot treatments having varieties. Results in the pooled data revealed that the rice crop sown during 23rd meteorological week recorded significantly higher grain and straw yield over all other sowing times viz., 24th and 25th meteorological week in descending order respectively. The mean agroclimatic indices viz., growing degree days and hydrothermal units were numerically higher due to sowing during 23rd meteorological week in all the physiological stages as well as in the total duration of the crop as compared to remaining delayed sowings. Whereas, the numerical higher heliothermal unit was recorded in sowing during 25th meteorological week in all the physiological stages as well as in the total duration of the crop. While in case of varieties, the short duration hybrid Sahydri-4 recorded significantly the highest grain yield over rest of the varieties followed by the medium duration Jaya. However, significantly the highest straw yield was recorded by tall medium duration Karjat-5 as compared to rest of the varieties followed by short duration hybrid Sahydri-4 and medium duration variety Jaya. The correlation studies between agroclimatic indices and yield of different varieties revealed that growing degree days showed significantly positive correlation with grain yield of all the varieties studied. While, hydrothermal units showed significantly positive correlation with the grain yield of short duration varieties and the heliothermal units with that of long duration varieties.