Abstract:
The field experiment was carried out at the central research farm of the Sher-e-Bangla
Agricultural University, Dhaka during the period from November, 2019 to June, 2020 in
boro season with a view to effect of phosphorus and potassium on growth and yield of
BRRI Hybrid dhan2. The experiment consisted of two factors. Factor A: Different levels
of phosphorous as P
0
= 0 kg P ha
-1
,P
1
=30 kg P ha
-1
, P
2
=45 kg P ha
-1
, P
3
=60 kg P ha
and
Factor B: Different levels of potassium as K
0
= 0 kg K ha
-1
, K
1
=30 kg K ha
=45 kg K
ha
-1
, K
3
=60 kg K ha
-1
. The experiment was laid out in Randomized Complete Block
Design with three replications. Four levels of both nutrients i.e. phosphorous and
potassium, total 16 treatments were tested in this experiment. In the study. N, P, K, S and
Zn were applied in the form of urea, triple super phosphate, muriate of potash, gypsum
and zinc sulphate respectively. The collected data were statistically analyzed. The result
revealed that there was a significant difference among the treatments. However, the
application of 45 kg P ha
-1
and 60 kg K ha
-1
together resulted in the maximum number of
tillers hill
-1
(24.33) and leaf area index (7.44), and with the combined treatment of P
2
(45 kg P+60 Kg K ha
-1
) also produced the height plant height (101.33 cm). The highest
grain yield 5.29 t ha
-1
was recorded from the treatment combination was P
3
(60 kg
P+45 Kg K ha
-1
). The highest biological yield (13.26 t ha
-1
) was noticed from the
treatment combination was P
3
K
2
(60 kg P+45 Kg K ha
-1
). So, the hybrid rice variety
“BRRI Hybrid dhan2” with application of 60 kg P ha
-1
and 45 kg K ha
considerably
more grain than the other treatment combinations. Comparatively, a control treatment
where no phosphorus and potassium applications were made during the research period
reported a minimum rice yield of 2.79 t ha
-1
.
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
MASTERS OF SCIENCE (MS)
IN
AGRICULTURAL BOTANY
