Abstract:
A pot experiment was conducted at the net house of the Department of Agricultural
Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, during Boro rice
cropping season of the year of 2017-18 to observe the effect of potassium in
mitigating adverse effect of salt stress on growth, development and yield of rice plant
(Oryza sativa L.). The experiment was conducted using two salinity levels with
potassium viz. S
0
= Control, S
1
= 4dSm
-1
salt, S
1
K
1
= 4dSm
-1
salt + 80 ppm potassium,
S
1
K
2
= 4dSm
-1
salt + 160 ppm potassium, S
2
= 6 dSm
-1
, S
2
K
1
= 6 dSm
+ 80 ppm
potassium, S
2
K
2
= 6 dSm
-1
+ 160 ppm potassium. The experiment was conducted in
Randomized Complete Block Design (RCBD) having one factor with three
replications. The results and the effect on morphological characters indicated that all
parameter were influenced by salinity and potassium. Among 3 salinity level (0, 4 &
6 dSm
-1
), the damaging effect was found more in higher stress (6 dSm
).But
potassium supplementation along with salt greatly reduced the damaging effect of salt.
Out of the 2 levels of potassium 160 ppm potassium significantly reduced the
damaging effect of salt. Therefore, for cultivation of BRRI dhan67 under saline
condition 160 ppm potassium application could be a better practice for getting higher
yield.
Description:
A Thesis
Submitted to the Department of Agricultural Botany
Sher-e-Bangla Agricultural University, Dhaka, in partial
fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE
IN
AGRICULTURAL BOTANY
