Abstract:
Roof top garden is suitable for vegetables cultivation in our country. Chili is an
important vegetable of robi season. Nitrogen (N) and phosphorus (P) play an
important role in growth of chili. An adequate amount of N and P exerts
significant effect on the growth and yields of this crop. This experiment was done
to evaluate suitable dose of N and P for different growth and yield contributing
parameters of chili in rooftop garden. The experiment was conducted at the roof
of third floor of Biotechnology department of Sher-e-Bangla Agricultural
University, Dhaka during October, 2016 to March, 2017. The two factorial
experiments were laid out in Completely Randomized Design (CRD) with three
replications. Three levels of nitrogen N
0
: 0 kg N ha-
1
, N
1
: 100 kg N ha-
: 130
kg N ha-
1
, P
2
1
and three levels of phosphorous P
: 80 kg P
2
O
5
ha-
1
0
: 0 kg P
2
O
5
ha-
1
, P
1
1
: 50 kg P
were used in this experiment. Growth and yield contributing
parameters significantly influenced by different doses of nitrogen and phosphorus
fertilizers. The dose of N
treatment gave the highest plant height (87.45 cm) and
most of the growth parameters increased with increasing nitrogen levels up to N
2
treatment. The dose of P
2
treatment
gave the highest plant height (79.45 cm) and
most of the growth parameters increased with increasing phosphorus levels up to
P
2
treatment. The treatment combination N
2
and P
gave the highest fruit diameter
(4.26 cm), fruit length (11.913 cm), yield of fruits plant-
2
1
(200 g), average fruit
yield plot-
1
(0.81 kg), individual fruit weight (0.84 g) and average fruit yield (6.79
ton/ha). Based on the present results, it can be suggested that the combined use of
130 kg N ha-
1
with 80 kg P
2
O
5
ha-
1
increased plant growth and fruit yield of chili
in rooftop garden. It is apparent that growth and yield of chili may be increased
by using nitrogen and phosphorus fertilizer.
