GROWTH AND YIELD OF BLACKGRAM AS AFFECTED BY AGRONOMIC MANAGEMENTS

Abstract

A field experiment was carried out at the research field of Sher-e-Bangla Agricultural University, Dhaka during the period of March to June 2019 to study the growth and yield of two blackgram varieties under different agronomic managements. The experiment comprised of two factors; Factor A: Variety (2) viz. BARI mash-1 (V ), BARI mash-3 (V 2 ) and Factor B: Agronomic Managements (7) viz. Control (No management) (M ), No fertilizer but all other managements (M 2 1 ), No weeding but all other managements (M ), No irrigation but all other managements (M ), No insecticide but all other managements (M 5 4 ), No fungicide/bacteriocide but all other managements (M ), Complete management (recommended) (M 7 6 ). The experiment was laid out in split-plot design with three replications. Data on different growth parameters, yield attributes and yield of blackgram were significantly varied for different treatment variables. The maximum germination percentage (99.62%), plant height (49.64 cm), number of leaves plant -1 (8.37), plant dry weight (0.78 g), days required to flowering (33.48), number of seeds pod (6.01), weight of 1000 grain (37.90 g), shelling percentage (67.86%), total grain yield (763.99 kg ha ), total shell yield (372.21 kg ha -1 ), biological yield (4508.46 kg ha -1 ) and harvest index (17.69%) was recorded from BARI mash-3 (V 2 ). The complete management (M ) resulted maximum germination percentage (100%), plant height (25.11 cm), number of leaves plant -1 (8.47), number of total pods plant -1 -1 (47.40), total grain yield (1072.53 kg ha ), total shell yield (547.39 kg ha -1 ) and harvest index (22.87%). The maximum germination percentage (100%), plant dry weight (0.93 g), total grain yield (1044.59 kg ha ) and harvest index (19.55%) was recorded from V 2 M . The overall result showed that BARI mash-3 (V 2 ) along with complete management (M 7 ) gave better growth and yield of blackgram. Compared to that of complete management, the highest yield reduction was observed in no management (77.08%) that followed by no weeding (73.04%), no insecticides (29.19%), no irrigation (25.50%), no fungicides (15.36%) and no fertilizer (12.93%).