Abstract:
The field experiment was conducted at the Research Farm of the Department of
Agricultural Botany, Sher-e-Bangla Agricultural University, during the period from
February to June 2022 to find the effect of sowing time and the application of auxin
and gibberellin on growth and yield of mungbean. The experiment comprised of two
factors viz. Factor A: Sowing time (3), i) S₁ = 5 March, ii) S₂ = 15 March and iii) S₃ =
25 March; factor B: Plant growth regulators (4), i) G₀ = Control, ii) G₁ = IAA 30 ppm,
iii) G₂ = GA₃ 30 ppm and iv) G₃ = IAA 30 ppm + GA₃ 30 ppm. The results revealed
that S₃ treatment (sowing at 25 March) exhibited its superiority to other sowing time of
5 March and 15 March in terms of growth and seed yield of mungbean. Sowing time
(25 March) S₃ out-yielded over S₂ by 11.67% higher yield. As S₃ showed the highest
number of pods plant⁻
1
(23.80), the highest number of seeds pod⁻
ii
1
(10.41), highest
length of mungbean pod (7.82 cm), the highest weight of 1000-seeds (40.21 g) and the
highest seed yield plot⁻
1
(192.16 g) than other sowing time in this experiment.
Significant differences existed among different plant growth regulator treatments with
respect to yield and yield contributing parameters of mungbean. A yield advantages of
0.05 t ha⁻
1
, 0.05 t ha⁻
1
and 0.07 t ha⁻
1
was observed from G₃ treatment over G₂, G₁ and
G₀ treated plot, respectively. The higher amount of yield from G₃ treatment was
possibly aided by the highest number of pods plant⁻
1
(23.00), the highest number of
seeds pod
-1
(10.54), highest pod length (7.98 cm), the highest weight of 1000-seeds
(44.26 g) and the highest seed yield plot⁻
1
(183.06 g). Significantly the highest seed
yield ha⁻
1
(0.72 t ha⁻
1
) was recorded from S₃G₃ [25 March × (IAA 30 ppm + GA₃ 30
ppm)] interaction due to the the highest number of pods plant⁻
1
(27.60), the highest
number of seeds pod⁻
1
(12.23), highest pod length (9.13 cm), the highest weight of
1000-seeds (46.54 g), and the highest seed yield plot⁻
1
(205.84 g). Mungbean seed
sown at 25 March and applied with IAA 30 ppm + GA₃ 30 ppm seems promising for
producing significantly higher yield of mungbean under the climatic and edaphic
conditions of Sher-e-Bangla Agricultural University.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRICULTURAL BOTANY
