Effect of Weather Parameters on Yield and Yield Attributes under Aerobic Rice Cultivation during Navarai Season

A field experiment was conducted during Navarai season of 2017 at research farm of Agronomy, Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal, Puducherry, India on investigate the performance of seed priming practices at different dates of sowing (February 6th, February 13th and February 20th) under aerobic condition. The results indicated that among the dates of sowing, crop sown on 6th February produced higher grain yield of 2591 kg ha-1. Correlation studies revealed that the direct weather parameters such as maximum and minimum temperature, rainfall, morning and evening relative humidity, total evaporation were significantly contributing to the rice grain yield and DMP. Similarly, the derived weather parameters viz., mean Diurnal Variation Temperature (DVT) total Growing Degree Day (GDD), total Helio Thermal Units (HTU), total Photo Thermal Units (PTU) and total Heat Unit Efficiency (HUE) were also significantly contributing to the rice grain yield. From the studyprovedthatthe sowing window February 6thto be more effective for realizing higher productivity of aerobic rice during Navarai season at Karaikal district of Puducherry.