Abstract:
The experiment was carried out in the farm of Sher-e-Bangla Agricultural University,
Dhaka, Bangladesh during the period from March to August 2018 to study the effect
of foliar application of gibberellic acid on morpho-physiological characters and yield
of okra. The experiment considered of two factors. Factor A – two okra variety; V
1
=
BARI dheros-1 and V
2
= Lal teer hybrid dheros and Factor B: Gibberellic acid (GA
3
)
- 4 levels; G
0
= Control (0 ppm GA
3
), G
1
= 50 ppm GA
3
ii
, G
2
= 100 ppm GA
3
=
150 ppm GA
3
and G
4
= 200 ppm GA
3
. The experiment was laid out in Randomized
Complete Block Design (RCBD) with three replications. Data on different growth,
yield components and yield of okra were recorded. Different growth and yield
parameters were significantly influenced by variety and GA
3
and also with their
combinations. Results showed that the variety V
2
(Lal teer hybrid dheros) gave
highest yield and yield contributing parameters compared to V
1
(BARI dheros-1).
Again, regarding, GA
3
effect, the treatment G
2
(100 ppm GA
3
) it gave the best
performance on yield and yield contributing parameters. Considering treatment
combination of variety and GA
3
, the highest SPAD value (68.35 at 50 DAS), length
of fruit (11.70 and 14.90 cm at 60 and 90 DAS, respectively), diameter of fruit (1.86
and 1.92 cm at 60 and 90 DAS, respectively), number of fruits plant
(24.60), fresh
weight of fruits plant
-1
(348.20 g), fruit yield plot
-1
-1
(6.26 kg) and fruit yield ha
(17.88 t) was obtained from the treatment combination of V
2
G
2
whereas the lowest
SPAD value (40.65 at 50 DAS ), length of fruit (6.67 and 8.87 cm at 60 and 90 DAS,
respectively), diameter of fruit (1.34 and 1.42 cm at 60 DAS and 90 DAS,
respectively) number of fruits plant
-1
(24.60), fresh weight of fruits plant
(198.70 g),
fruit yield plot
-1
(3.47 kg) and fruit yield ha
-1
(9.92 t) were observed from the
treatment combination of V
1
G
O.
These results suggested that gibbrellic acid increased
the yield of okra.
Description:
A Thesis
Submitted to the Department of Agricultural Botany
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN AGRICULTURAL BOTANY
