Abstract:
A field experiment was conducted at the research field of Sher-e-Bangla Agricultural
University, Dhaka during the period from October 2017 to January 2018 to study the
effect of growth regulators on growth and yield of mungbean under different late
sowing conditions in kharif-II season. The experiment was comprised of two factors;
factor A: growth regulators (6) viz. G
0
ii
= distilled water, G
= 20 ppm BAP
(Benzylaminopurine), G
2
= 40 ppm BAP, G
3
= 20 ppm GA
3
1
(Gibberellic acid), G
=
40 ppm GA
3
, G
5
= 60 ppm GA
3
and factor B: sowing date (2) viz. S
1
= sowing on 31
October, 2017, S
2
= sowing on 14
th
November, 2017. The experiment was laid out in
randomized complete block design (RCBD) in factorial arrangements with three
replications. Results revealed that in case of growth, plant height (38.35 cm), and dry
weight (9.57g) plant
-1
were significantly higher in G
5
(60 ppm GA
) treatment. In
terms of yield and yield attributes, number of pods plant
-1
(6.56), number of seeds
pod
-1
(5.52), weight of 1000- seeds (35.07 g), seed yield (0.26 t ha
), and harvest
index (37.75 %) were higher in G
5
(60 ppm GA
3
3
-1
) treatment). Sowing at 31
October
showed better results in case of all growth and yield parameters than sowing at 14
November. Results from Interaction effect between different levels of growth
regulators and different sowing conditions revealed that the highest plant height
(39.43 cm), number of pods plant
-1
(8.80), number of seeds pod
-1
(7.22), weight of
1000-seeds (38.74 g), seed yield (0.45 t ha
-1)
were observed in S
1
G
October with 60 ppm Gibberellic acid) interaction. The results in this study indicated
that the plants performed better in respect of growth, yield and others yield
contributing characters in S
1
G
5
(Sowing on 31
th
5
October with 60 ppm Gibberellic
acid) treatment.
