INFLUENCE OF AGRONOMIC MANAGEMENTS ON GROWTH AND YIELD OF BORO RICE
Date
2020
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF AGRONOMY
Abstract
The experiment was conducted at the experimental field of Sher-eBangla
Agricultural University, Dhaka during the period from
December, 2018 to April 2019 to study the influence of agronomic
managements on growth and yield of Boro rice. The experiment
comprised of two factors having two varieties viz. BRRI dhan84 (V
),
and BRRI hybriddhan5 (V
) in the main plots and seven agronomic
managements viz. no management (M
2
), no weeding but all other
managements (M
1
0
), no fertilizer application but all other managements
(M
), no irrigation in reproductive and ripening stage but all other
managements (M
2
3
), no insecticides but all other managements (M
), no
fungicides/ bactericides but all other managements (M
) and complete
managements (M
6
5
) in the sub-plots with three replications. Significant
variation was recorded for weed severity, different yield contributing
characters and yield of Boro rice. The lowest weed population (13.83 m
2
) was recorded in M
4
and weight of weed biomass (2.81 g m
) was
recorded in M
6
, whereas the highest weed population (144.83 m
) was
found in M
0
(no management) but the highest weight (77.17 g m
) was
found in the M
treatment. The tallest plant of 24.81 cm, 51.56 cm, 86.71
cm and 119.21 cm were recorded at 20, 45, 70 DAT and at harvest,
respectively. Higher grain yield (5.36 t ha
1
-1
) and lower straw yield (4.97
t ha
-1
) were recorded from V
2
compared to that of V
. Irrespective of
agronomic managements, the higher plant height was given by BRRI
dhan84 except no management. The highest grain yield (6.70 t ha
1
) was
observed from M
6
and the highest straw yield (6.55 t ha
-1
. In
respect of interaction, the highest grain yield (7.35 t ha
-1
) were observed
from V
2
M
6
where V
2
M
5
statistically identical and V
1
M
4
-2
-2
-2
-1
) from M
, V
,
V
2
M
3
, V
2
M
4
statistically similar and highest straw yield (7.37 t ha
)
were observed from V
1
M
4
where V
1
M
3
, V
1
M
6,
V
2
M
3
, V
2
M
statistically
similar, while the lowest grain yield (1.00 t ha
-1
) from V
and straw
yield (2.07 t ha
-1
) from V
2
M
0
1
. Irrespective of variety, the highest yield
reduction in BRRI dhan84 was 84% in no management that followed by
80% in no fertilizer treatments whereas the rate was 71% for BRRI
hybriddhan5 of Boro rice.
Description
A Thesis
Submitted to the Department of Agronomy, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka in partial
fulfillment of the requirement for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
Keywords
AGRONOMIC MANAGEMENTS, BORO RICE