Abstract:
An experiment was conducted from November 2020 to April 2022 to study the
effect of arsenic on the growth, yield and nutrients content of five boro rice
varieties viz. V
1
(BR-14), V
2
(BRRI dhan58), V
3
ii
(BRRI dhan67), V
4
(BRRI
dhan88), and V
5
(BRRI dhan92) which were comprised of five arsenic
treatments viz. As
0
(20 ppm), and As
4
(control; no arsenic added), As
1
(2 ppm), As
2
(40 ppm). In case of single effect, the maximum growth
(plant height, leaf length, leaves number, total tillers number) were found in V
3
(BRRI dhan67) variety whereas minimum growth parameters for plant height
and leaf length were found in V
5
, for leaves number V
4
and total tillers number
were found in V
2
. The control treatment As
0
(no arsenic) gave the maximum
growth that was decreased by increasing of As level. Maximum yield
parameters number of grains, number of filled grains, thousand grain weight
and grain yield were found in V
2
variety whereas minimum yield parameters
(panicle length, number of panicle) were found in V
5
but maximum straw yield
was observed in V
1
variety. The control treatment As
0
(no arsenic produced)
gave the maximum yield, which was decreased by increasing of As level. In
case of combined effect maximum plant height, number of grains per panicle,
number of filled grains per panicle, thousand grain weight and grain yield were
found from V
3
As
0
treatment whereas maximum straw yield obtained from
V
1
As
0
. P and K content decreased with increasing arsenic level but S and As
content showed opposite trend. Maximum arsenic content was observed in
V
4
As
4
treatment whereas minimum in controlled treatment. But considering
everything it can be concluded that V
2
(BRRI dhan 58) performed best in terms
of grain yield and As effect.
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
AGRICULTURAL CHEMISTRY
