Published Paper Details:

A field experiment was conducted during Navarai season from February to June, 2017 at Agronomy farm of Pandit Jawaharlal Nehru College of Agriculture and Research Institute Karaikal, Union Territory of Puducherry, India to study the crop weather relationships on yield of aerobic rice under coastal region. The treatment consisted of three different date of sowing by weekly interval (February 6th, February 13th and February 20th) with five different seed priming practices. The treatments were evaluated in factorial concept of RBD with three replication. The results indicated that with respect to date of sowing, seeds sown on 6th February produced significantly the highest grain yield (2591.5 kg ha-1). This was followed by 13th February and 20th February of 1977.7 and 1236.8 kg ha-1, respectively. Correlation studies showed that the total bright sunshine hours did not significantly influenced the grain yield. However the mean maximum temperature, mean minimum temperature, total rainfall and total evaporation had a significant effect on grain yield. Considering the overall life span, the Agrometeorological indices viz., total Relative Temperature Disparity and total Relative Humidity Disparity did not influence the grain yield significantly, whereas all other derived weather parameters had a significant effect on grain yield. Regarding stepwise regression equations between grain yield of rice and weather parameters revealed that mean maximum temperature, mean morning relative humidity, mean evening relative humidity, total rainfall, total sunshine hours and total evaporation contributed to an extent of 90.5 per cent for total life span. The agrometeorological indices contributed significantly to the extent of 97.8 and 98.5 per cent during reproductive phase and total lifespan, respectively. From the study proved that the sowing window February 6th to be more effective for realizing higher productivity during Navarai season under aerobic rice cultivation at the coastal deltaic region.