Author(s): A. HOQUE, D. MAJUMDER, S. BANERJEE, M. GHOSH AND L. DAS

Abstract: A trial was directed at the Jaguli Instructional Farm of Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal to evaluate the heat indices of ten blackgram varieties during post-kharif season of 2018. Mean cultivar days from sowing to emergence, flower initiation, pod initiation and maturity of blackgram were found to be 4.93, 42.17, 57.57 and 83.40 days, respectively. Among 10 blackgram varieties, number of days to maturity varied between 81.33 days (V₆) and 84.67 days (V₃ and V₄). The average summed GDD, HTU and PTUs for entire life cycle were recorded as 1339.59^oC day, 8542.07^oC hour and 15881.29^oC hour, respectively. Genetic variation in plant height of blackgram was noted between 25.93 and 30.67 cm at 30 DAS, 32.33 and 41.67 cm at 45 DAS, 44.33 and 52.93 cm at 60 DAS; and 51.10 and 60.27cm at maturity in the study. KU 16-77 (V₈), Pant U 35 (V₃) and Pant U 19 (V₁) gave higher seed yield (1144.81, 1097.22 and 1057.17 kg ha^-1). The variation in Heat use efficiency was noted between 0.607 kg ha^-1p C day^-1 (Pant U-31) and 0.852 kg ha^-1°C day-1 (KU 16-77). In case of protein content in seeds, KU 15-07 (V5) recorded highest value (24.42%) while KU 15-102 had lowest protein content (19.07%).

DOI: 10.22271/09746315.2021.v17.i2.1456

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