Abstract:
An experiment was conducted to study the morpho-physiological
characters and yield of broccoli with different
planting times and
concentrations of GA
3
at Sher-e-Bangla
Agricultural University, Dhaka,
Bangladesh during the period of October 2016 to May 2017. The
experiment was consisted of two
factors one is different planting times
as- T
1
: 1 November, T
2
: 15 November and T
3
: 30 November; another is
levels of gibberellic acid-GA
3
as G
0
: 0 ppm GA
3
ii
, G
1
: 25 ppm GA
3
: 50
ppm GA
3
and G
3
: 75 ppm GA
3
. This two factorial
experiment was laid
out in Randomized Complete Block Design
(RCBD) with three
replications. Different planting times and GA
3 influenced significantly on
most of the parameters. The maximum plant height (57.94 cm), number
leaves plant
(17.80), longest leaf length (24.22 cm), diameter of stem
(12.19 cm), curd diameter (41.13 cm), weight of curd (517.6 g) and yield
(21.81ton ha
-1
-1
)
was found in T
2
(15 November) and 57.25 cm, 17.72,
21.96 cm, 11.89 cm, 39.92 cm, 490.3 g and 21.69 ton
ha
-1
in G
2
(50 ppm)
respectively. Whereas, lowest value of these parameters were
found in T
3
(30 November) and G
3
(75 ppm). In case of combined effect the highest
value was recorded from T
2
G
2
and lowest recorded in T
3
G
3
. In view of
overall performances, this study suggests that the transplanting time T
2
(15 November) and the foliar application of GA
3
, G
2
(Gibberellic acid) at G
2
(50 ppm)
independently as well as combinedly gave best performance.
From the study it was also discovered that application of more than 50
ppm GA
3
reduced the yield characters and yield of broccoli
