EFFECT OF NITROGEN AND POTASSIUM ON THE GROWTH AND YIELD OF ONION
Date
2021-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF SOIL SCIENCE, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, SHER-E-BANGLA NAGAR, DHAKA
Abstract
The experiment was conducted at the Research Farm of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh in Rabi season during December 2019 to March 2020.
The experiment was undertaken to investigate the effect of nitrogen (N) and potassium
(K) on the yield of onion. Eight treatments viz. T
1
= N
0
P
45
K
0
S
30
Zn
3
B
1.5
=
N
80
P
45
K
80
S
30
Zn
3
B
1.5
kg ha
-1
, T
3
= N
100
P
45
K
80
S
30
Zn
3
B
1.5
(Control), T
2
kg ha
=
N
100
P
45
K
100
S
30
Zn
3
B
1.5
kg ha
-1
, T
5
= N
120
P
45
K
100
S
30
Zn
3
B
1.5
kg ha
=
N
120
P
45
K
120
S
30
Zn
3
B
1.5
kg ha
-1
, T
7
= N
140
P
45
K
100
S
30
Zn
3
B
1.5
kg ha
=
N
140
P
45
K
120
S
30
Zn
3
B
1.5
kg ha
-1
were used in this experiment. The experiment was laid out
in a randomized complete block design (RCBD) with three replications. Results of the
experiment revealed that N and K significantly influenced yield parameters and yield of
BARI Piaz-4. Among different treatments, T
7
performed the best in respect of all yield
and yield contributing characteristics while the lowest value of those parameters was
observed in the control treatment T
1
. The highest plant height (57.28 cm) at harvest was
recorded in T
7
followed by T
8
(53.67 cm) treatment and the shortest plant (42.32 cm)
being found in T
1
when the crop was not fertilized with N and K. The treatment T
7
produced the highest number of leaves plant
-1
(12.00) at 70 DAP which was significantly
higher than all other treatments. Among different treatments the highest leaf length (53.83
cm) was noted with T
7
at harvest which was statistically identical with and the lowest leaf
length (39.67 cm) observed in T
1
treatment
at harvest. The maximum fresh weight of
leaves plant
-1
(35.2 g), dry matter content of leaves (16.83 %), diameter of bulb (5.57
cm), length of bulb (5.93 cm), fresh weight of bulb plant
-1
(67.52 g), dry matter content
of bulb plant
-1
(14.33 %), yield plot
-1
(10.92 kg) and bulb yield (21.83 t ha
) was noted
in T
7
treatment. Therefore, it is concluded that the treatment T
7
(N
140
P
45
kg ha
-1
) may be recommended for maximizing the yield of BARI Piaz-4 at Tejgaon series
soil of SAU Research Farm.
-1
-1
, T
4
-1
, T
6
and T
8
-1
K
100
S
30
Zn
3
B
1.5
Description
A Thesis
submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka-1207,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
SOIL SCIENCE
SEMESTER: JANUARY-JUNE, 2021
Keywords
NITROGEN AND POTASSIUM, ONION