Effect of heat use efficiency and thermal unit at different phenophases of rice (Oryza sativa L.) cultivars

A field experiment was conducted during kharif season of 2017 on the topic entitled “Effect of heat use efficiency and thermal unit at different phenophases of rice (Oryza sativa L.) cultivars.” in sandy loam soil of N.D. University of Agriculture and Technology, Kumarganj, Faizabad (U.P.). The experiment consisted of nine treatment combinations comprised of three transplanting dates viz., July 5th, July 15th and July 25th and three varieties viz., NDR-97, NDR-3112 and BPT-5204. Results reveal that Highest Heat use efficiency (HUE) was recorded in growing environment of July 25th transplanting at all the stage followed by July 15th and July 5th transplanting while among the variety NDR-3112 recoded highest HUE followed by BPT-5204and NDR-97.