Abstract:
A field experiment was conducted at research field of Sher-e-Bangla Agricultural
University, Dhaka during the period from October 2020 to January 2021 in Rabi
season to study the on the effect of bio-fertilizer with reduced amount of chemical
fertilizer on growth, yield and quality of kohlrabi variety. The experiment consisted
of two factors, and followed Randomized Complete Block Design (RCBD) with three
replications. Factor A: Kohlrabi varieties (3) viz; V
1
= Quick star, V
= Challenger,
V
3
= Rapid and Factor B: Different fertilizer managements (3) viz; F
=
Recommended dose of NPK (Control), F
1
2
= 50 % NPK + 2 kg/ha biofertilizer, F
= 50
% NPK + 4 kg/ha biofertilizer and F
= 50 % NPK + 6 kg/ha biofertilizer.
Experimental results revealed that different varieties and application of different doses
of bio-fertilizers significantly influenced the growth, yield and quality of kohlrabi. In
case of different kohlrabi varieties the lowest yield (12.96 t ha
3
-1
2
) was observed in V
(Quick star) variety. Whereas cultivating Challenger (V
) variety gave the highest
fresh weight of knobs (128.12 g), dry weight of knob (8.16 g), knob diameter (6.43
cm), yield (14.24 t ha
-1
2
), magnesium content (0.89 %), potassium content (2.31 %),
manganese content (25.38 ppm) and vitamin C content (28.17 mg 100 g
). Among
different doses of bio-fertilizers application the highest fresh weight of knobs (140.64
g), dry weight of knobs (8.26 g), knob diameter (6.70 cm), yield (15.63 t ha
), and
nutrient status were observed in F
(50 % NPK + 6 kg/ha biofertilizer) treatment. In
case of combination, V
2
F
3
3
combination treatment gave the highest fresh weight of
knobs (150.67 g), yield (16.74 t ha
-1
), magnesium content (0.98 %), potassium content
(3.18 %), manganese content (34.98 %) and Vitamin C content (33.33 mg 100 g
) in
kohlrabi comparable to other treatment combination. Therefore, it was suggested that
cultivation of Challenger variety along with application of 50 % NPK + 6 kg/ha
biofertilizer (V
2
F
) combination treatment would help to influenced plant growth and
increase its ability to enhanced better yield and quality production of kohlrabi.
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
