Abstract:
ABSTRACT
Amaranth (Amaranthus spp.) is a promising vegetable species often grown under
semiarid conditions prone to both drought and salinity. This study was conducted to
evaluate the effect of organic acid to mediate the salt stress of red amaranth. Both lab
and pot experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka
to investigate the effect of organic acid to mediate the salt stress of red amaranth
during the period from January to February 2020 in Rabi season. Lab experiment
consisted of, red amaranth seed treated with eight salt concentrations: T
0
= 0 mM
NaCl (control), T
1
= 25 mM NaCl, T
2
= 50 mM NaCl, T
3
= 75 mM NaCl, T
4
= 100 mM
NaCl, T
5
= 150 mM NaCl, T
6
= 200 mM NaCl and T
7
= 250 mM NaCl. The pot
experiment was consisted of two factors (2) viz. Factor A: Three salt stress condition
viz., (3), S
0
: Control (0 mM NaCl), S
1
: Mild stress (50 mM NaCl) and S
2
: Severe
stress (100 mM NaCl) and Factor B: Different organic acid treatment viz. (3), A
0
:
(Control), A
1
: Ascorbic acid, and A
2
: Citric acid. Both lab and pot experiment was
laid out in Completely Randomized Design (CRD) with three replications.
Experiment result revealed that in lab experiment red amaranth seed treated with
extreme salt concentration (250 mM NaCl) impacted negatively and recorded
minimum germination (26.33 %), radical length (0.78 cm), plumule (0.27 cm) and
total length (1.06 cm) compare to other treatments from the lab experiment. In pot
experiment, different salt stress condition reduced yield which was minimum (120.02
g pot
-1
and 12.09 t/ha) in severe salt stress condition. Among different organic acid,
seeds treated with ascorbic acid performed best compare to citric acid or control
treatment and recorded maximum yield pot
-1
(211.11 g) and yield (21.26 t/ha) at 30
DAS. In case of combined effect, different salt stress condition along with ascorbic
acid performed the best and increased 30.94 and 99.98 % yield pot
-1
, and 30.92 and
99.98 % yield (t/ha) under mild and severe salt stress condition thus this treatment is
suitable for saline thrives area for higher red amaranth vegetable production.
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
AGROFORESTRY AND ENVIRONMENTAL SCIENCE
SEMESTER: JULY-DECEMBER, 2020
