Vol. 8, Special Issue 12, Part C (2024)

The present experiment was carried out during Rabi season of 2022-23 at the research and instructional farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh, to analyse different agrometeorological indices for different varieties of wheat crop under different growing environment at Raipur District. The experiment was laid out in factorial Randomized Block Design with three replications and two factors. First factor (Sowing dates) viz., D₁- 30^th Nov, D₂- 10^th Dec, D₃- 20^th Dec and second factor (3 Varieties) viz., V₁ -Kanchan, V₂-HD-2967 and V₃ -CG-1013. The weather data required for the study were collected from the Agromet observatory, Department of Agricultural meteorology, COA, IGKV, Raipur. The results observed in this experiment indicate that highest accumulated GDD, PTU, HTU, HUE and RUE were found in growing environment D₁ (30^th Nov.) followed by D₂ (10^th Dec.) and D₃ (20^th Dec.). Among three varieties, HD-2967 variety showed highest accumulated growing degree day (AGDD), accumulated photo thermal unit (APTU) and accumulated helio thermal unit (AHTU) i.e. 1924.5 to 2064.2 °C days, 22146.0 to 23441.6 °C day hours and 11537.8 to 11733.0 °C day hours, respectively. Kanchan variety reported highest heat use efficiency (HUE) 1.23 to 2.45 g/m² deg day and radiation use efficiency (RUE) 3.19 to 6.49 g/m² /MJ, respectively.