Abstract:
The present study was carried out at the roof top (indoor structure) of Dr. M. Wazed
Mia Central Laboratory, Sher-e-Bangla Agricultural University, Dhaka. during the
period from November 2020 to December 2020 to study the improvement of plant
growth and yield of Pakchoi under different LED-light spectrum in vertical farming.
Six treatments of the experiment viz. (i) T
(Fluorescent light – Full; control), (ii)
T
W
(White - Full), (iii) T
R
(Red - Full), (iv) T
FL-T5
ii
B
(Blue - Full), (v) T
(Red and Blue -
4:1) and (vi) T
RBG
RB
(Red, Blue with Green - 4:1:1) were laid out in a Randomized
Complete Block Design (RCBD) with three replications. PPFD of different LED light
was maintained at 115 µmol/m
2
/s and duration was 16 hrs per day. Results showed
that the highest plant height (24.41 cm), number of leaves plant
-1
(14.33) and leaf
breadth (9.10 cm) were found from the treatment T
(Red and Blue - 4:1) but the
highest leaf length (18.23 cm) was from the treatment T
RB
(White - Full) whereas the
lowest plant height (17.68 cm), number of leaves plant
-1
W
(9.00), leaf length (16.50 cm)
and leaf breadth (4.22 cm) were found from the treatment T
(Red - Full). Treatment
T
RB
R
(Red and Blue - 4:1) also registered the highest stem diameter (1.20 cm), average
diameter of whole plant (8.24 cm), leaf base breadth (1.92 cm), fresh weight plant
(336.67 g), total yield (1.29 kg) and total soluble solids (9.24 °Brix) but the highest
vitamin-C content (41.81 mg/100g) was achieved from T
(Red, Blue with Green -
4:1:1) whereas T
B
RBG
(Blue - Full) gave the highest SPAD value (42.04) and moisture
content (94.12%). The lowest stem diameter (0.70 cm) was recorded from the
treatment T
(Blue - Full) but the lowest diameter of whole plant (6.08 cm), fresh
weight plant
B
-1
(120.00 g), leaf base breadth (1.36 cm) and total yield (0.18 kg) of the
experimental area were recorded from the treatment T
(Red, Blue with Green -
4:1:1). T
W
(White - Full) showed lowest SPAD value (34.60) but T
RBG
(Red - Full) gave
the lowest vitamin-C content (38.24mg/100g). From the above results, the treatments
of different LED-light spectrum in vertical farming, T
RB
R
(Red and Blue - 4:1) can be
considered as the best treatment followed by control treatment T
(Fluorescent
light - Full) among all the treatments.
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
IN
HORTICULTURE
