RESPONSE OF MUNGBEAN GENOTYPES TO GIBBERELLIC ACID IN RABI SEASON

Abstract

A field experiment was accomplished in the Agronomy farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2019 to February 2020 to study the response of mungbean genotypes to Gibberellic acid in Rabi season. The experiment was comprised of two factors; factor A: Four varieties (4) viz. V 1 = Sonamug, V 2 = BARI mung-4, V 3 = BARI mung-5 and V 4 = BARI mung-6 and factor B: Three levels of GA 3 (3) viz. G 0 = 0 ppm GA 3 (control), G 1 = 40 ppm GA 3 and G 2 = 80 ppm GA 3 . The experiment was laid out in split plot design with three replications assigning variety in the main plot and GA 3 in the sub plot. Data on different growth and yield attributes were taken in which all the treatment showed significant variations. In the case of varieties, maximum plant height (31.16 cm), number of leaves (15.45), leaf dry weight (2.14 g), stem dry weight (1.90 g), pod length (6.62 cm), pods plant -1 (35.44), seeds pod -1 (10.77) and 1000 seeds weight (41.06 g) were recorded from V 4 (BARI mung-6) treatment. In the case of GA 3 , maximum plant height (31.16 cm), number of leaves (15.58), leaf dry weight (1.99 g), stem dry weight (1.60 g), pod length (6.63 cm), pods plant (10.44) and 1000 seeds weight (36.83 g) were recorded from G 1 -1 (29.41), seeds pod ) treatment. The maximum seed yield (1188.10 kg ha -1 (40 ppm GA 3 ) was recorded from V 4 (BARI mung-6) and on the other hand, the lowest seed yield (638.10 kg ha -1 ) obtained from V 1 . Significantly higher seed yield (917.10 kg ha -1 ) was recorded from G 1 (40 ppm GA 3 ) while the lowest seed yield (842.68 kg ha -1 ) from G 0 treatment. In the case of the combination effects of treatments, the maximum yield (1276.80 kg ha ) was recorded from V 4 G 1 while that of the lowest was found (500.60 kg ha ) recorded from V 1 G 0 treatment. Thus, it was apparent from the above results that V 4 combination of treatments was found best in the terms of seed yield of mungbeen under study.