Abstract:
The experiment was conducted at the Horticulture farm of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh during the period from October 2018 to January 2019.
Five French marigold cultivars viz. V
1
(Royal yellow fire), V
2
ii
(Royal red), V
3
(Royal
orange), V
4
(Royal bolero) and V
5
(Royal yellow) and four levels of GA
3
application
viz. G
0
(control; 0 ppm GA
3
), G
1
(50 ppm GA
3
), G
2
(100 ppm GA
3
) and G
3
(150 ppm
GA
3
) were considered for the study. The experiment was laid out in Randomized
Complete Block Design (RCBD) with three replications. In case of the combination of
cultivars and GA
3
, all the parameters were affected significantly. The maximum plant
height (34.67 cm) and number of leaves plant
-1
(25.40) were achieved from V
4
. The
lowest days to 1
st
visible flower bud (14.67), days to 1
st
flower (14.67), days to 50%
flowering (25.33) and days to 80% flowering (31.67) were recorded from V
4
which
also gave highest number of branches plant
-1
(9.87), floral diameter (6.53 cm), single
flower weight (5.33 g), total number of flowers plant
-1
(24.62) and number of flowers
ha
-1
(6154 thousand). Again, the minimum plant height (24.93 cm) and number of
branches plant
-1
(4.67) were recorded from V
5
G
0
which also contributed to the lowest
floral diameter (5.03 cm), single flower weight (2.00 g), total number of flowers plant
1
(15.05) and number of flowers ha
-1
(3763 thousand). Concerning economic study, the
highest gross return (Tk. 615400), net return (Tk. 397992) and BCR (2.83) were
obtained from V
4
G
2
whereas the lowest gross return (Tk. 376300), net return (Tk.
162162) and BCR (1.75) were obtained from V
5
G
0
. From the above results, it can be
concluded that the treatment combination of V
4
G
2
G
3
G
2
(Royal bolero with 100 ppm GA
3
)
showed highest yield advantage regarding flower yield of marigold and this treatment
combination can be considered as the best treatment combination.
