Author(s):

Uttam Kumar Diwan, Harshvardhan Puranik and Jawahar Lal Chaudhary

Abstract: The present experiment was carried out during rabi season of 2016-17 at the research cum instructional farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh to find out the heat units requirement of wheat crop influenced by genotypes and different thermal environments in Chhattisgarh plain zone. Raipur is located in south-eastern part of Chhattisgarh belongs to Chhattisgarh plain zone at latitudes, longitudes and altitudes of 21⁰16’ N, 81⁰36’ E and 289.5 m above mean sea level respectively. The experiment was laid out in factorial Randomized Block Design with three replications and two factors. First factor (thermal environment) viz., D₁ – 15 Nov. and D₃ – 15 Dec, second factor was varieties (3); V₁ -CG 1013, V₂-Kachan, and V₃ –HD 2967.The fertilization, irrigation and management practices as recommended in the packages of practices for wheat crop in the Chhattisgarh plain zone were strictly applied. The weather data required for the study were collected from the Agrometeorological Observatory of the Department of Agrometeorology, of Indira Gandhi Krishi Vishwavidyalaya, Raipur Chhattisgarh. The results observed in this experiment indicate that highest values heat units (GDD, PTU & HTU) recorded when crop sown on D₁-15^th Nov. followed by D₂ – 30 Nov. In case of cv. HD-2967 accumulated highest GDD, PTU and HTU.

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