Abstract:
An experiment was carried out at the Horticultural farm of Sher-e-Bangla Agricultural
University, Sher-e-Bangla Nagar, Dhaka-1207 during the period from October 2018 to
February 2019 to find out the effect of gibberellic acid (GA
3
) and potassium (K) on
growth and yield of cauliflower (variety ‘Snowball’). The experiment was laid out in a
Randomized Complete Block Design (RCBD) with three replications. It consisted of two
factors. Factor A: four levels of GA
3
(G
0
: 0 ppm GA
3
ii
(control); G
1
: 95 ppm GA
3
:
115 ppm GA
3
and G
3
: 135 ppm GA
3
) and factor B: three levels of potassium (K
0
: 0 kg
K
2
O/ha (control); K
1
: 75 kg K
2
O/ha and K
2
: 100 kg K
2
O/ha). In case of gibberellic acid,
the highest plant height (64.13 cm) at harvest, curd diameter (24.36 cm), marketable yield
per hectare (34.39 t/ha) was recorded from G
1
and the lowest was recorded from G
0
. In
case of potassium, the highest plant height (60.05 cm) at harvest, curd diameter (21.80
cm), marketable yield per hectare (31.42 t/ha) was recorded from K
2
and the lowest was
recorded from K
0
. In case of combination of gibberellic acid and potassium, the highest
plant height (66.73 cm) at harvest, curd diameter (25.73 cm), marketable yield per
hectare (35.50 t/ha) was recorded from G
1
K
2
and the lowest was recorded from G
0
.
The highest benefit cost ratio (1.89) was noted from the treatment combination of G
1
and the lowest (1.34) was obtained from G
0
K
0
. From economic point of view, it is
apparent from the above results that the combination of G
1
K
2
was more profitable than
rest of the combination.
