Abstract:
This present study was conducted at an indoor structure on the 5
floor of
Dr. Wazed Mia Research Centre, Sher-e-Bangla Agricultural University,
Dhaka. During the period from November to December, 2020. The
experiment comprised of single factors that is viz., Five different
concentrations of LEDs light (White light L
1
II
: 100; Red light L
2
: 100; Blue
light L
3
: 100; Red: Blue light L
4
th
: 70:30 and Red: Green: Blue light L
5
:
70:10:20). Four different crops (C
1
: Mustard, C
2
: Lettuce, C
3
:
Broccoli) were used as microgreen crops. Results showed that the highest
hypocotyl length of C
1
, C
2
, C
3
and C
4
were (10.53cm, 8.47cm, 15.23cm and
11.43cm) from the treatment of L
4
C
1
, L
4
C
2,
L
4
C
3,
and L
4
C
4
whereas the
lowest (7.67 cm, 5.53 cm, 11.2 cm and 7.73 cm) were found from the control
treatment L
1
L
4
C
3,
and L
4
C
1
C
4
, L
1
C
2
L
1
C
3
and L
1
C
4
respectively. Treatment of L
4
registered the highest fresh weight of C
1
, C
2
, C
3
(0.1,
0.1, 0.1 and 0.1kg) and yield (0.115, 0.110, 0.135 and .125kg). The treatment
L
4
C
1
, L
4
C
2,
L
4
C
3,
and L
4
C
4
gave the highest SPAD value C
1
(16.9nm), C
3
(55.3nm) and C
4
(49.9nm), nitrogen (%) of C
1
(16.93%), C
3
(55.27%) and C
4
(93.93%), potassium (%) of C
1
(0.19%),
C
2
(0.19%), C
3
(0.22%), C
2
(0.22%) and C
4
(0.23%), C
3
: Radish, C
4
C
1
and C
4
, L
4
(38.2nm), C
2
(38.23%), C
2
(0.16%) and antioxidant capacity of C
1
(0.19%) and C
4
(0.18%). The highest and lowest
gross income was obtained from L
4
C
1
, L
4
C
2,
L
4
C
3,
and L
4
C
4
treatment and
L
1
C
1
, L
1
C
2
L
1
C
3
and L
1
C
4
treatment. The highest (4.1, 3.9, 4.9 and 4.5) and
lowest (2.6, 2.4, 2.7 and 2.6) benefit cost ratio was noted for L
4
L
4
C
3,
and L
4
C
4
treatment and L
5
C
1
, L
5
C
2
L
5
C
3
and L
5
C
4
treatment. So, Red
and Blue (70:30) light can be economically used.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
HORTICULTURE
