Author(s):

Zuby Gohar Ansari, AS Gontia and Yogendra Singh

Abstract: A field experiment was conducted to study the photo thermal requirements of mungbean varieties under different photo thermal environment during summer seasons of 2017-18 and 2018-19 at the Research area, Department of Plant Physiology, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (Madhya Pradesh). The experiment was laid out in a factorial randomized block design replicated thrice treatments consisted of three sowing environments viz., Feb 12^th, Feb 27^th and Mar 14^th and five mungbean varieties viz., PDM 139, Pusa Ratna, Pusa Vishal, Pusa 1431 and TJM 3. Results revealed that duration to attain different phenophases and thermal units during sowing to maturity decreased with successive delay in sowing form November. Feb 27^th sowing produced significantly higher total dry matter accumulation, higher seed yield and biological yield as compared to Feb 12^th and Mar 14^th. Among mungbean varieties, PDM 139 outyielded (730.42 Kg ha^-1) other genotypes. In interactions PDM 139 on 27^th Feb (826.02 Kg ha^-1) revealed significantly higher total dry matter accumulation, higher seed yield and biological yield followed by other interactions.

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