Abstract:
The experiment was conducted at the Sher-e-Bangla Agricultural University, Dhaka-1207,
Bangladesh, from June 2021 to December 2021 to study the growth and yield of black rice
(Oryza sativa L. indica) as affected by seedling age and seedling rate (no. of seedlings
hill
-1
). Black rice was used as the test crop for this experiment. The experiment comprised
two factors. Factor A: Seedling age (4 levels); 25 days old seedling, 30 days old seedling,
35 days old seedling, and 40 days old seedling, and Factor B: Seedling rate (no. of seedlings
hill
-1
) (3 levels): 1 seedling hill
-1
; 2 seedling hill
-1
and 3 seedling hill
-1
. The experiment was
laid out in a Randomized Complete Block Design (RCBD) with three replications. Due to
the combination effect of seedling age and seedling rate, the maximum number of effective
tillers hill
-1
(14.00) was found in the treatment combination of 35 days old seedlings
transplanted in 2 seedlings hill
-1
and the minimum number (2.00) in 25 days seedling age
with 3 seedlings hill
-1
. The longest plant height (184.87 cm) was found in the treatment
combination D
4
S
1
(40 days old seedling and 1 seedling hill
-1
), whereas the shortest plant
(161.60 cm) was found in the treatment combination D
1
S
3
(25 days old seedling with 3
seedlings hill
-1
). The maximum number of filled grains panicle
-1
(353.2) was found in the
treatment combination of D
3
S
2
(35 days old seedling and 2 seedlings hill
), and the
minimum number (270.73) was found in D
1
1
). The highest grain yield (5.56 t ha
-1
S
3
-1
(25 days old seedling and 3 seedlings hill
) was found in the treatment combination of D
3
(35
days old seedling and 2 seedlings hill
-1
), and the lowest grain yield (2.87 t ha
) was
observed from D
1
S
1
(25 days old seedling and 1 seedling hill
-1
), but the highest straw yield
(5.69 t ha
-1
) was found in the treatment combination of D
3
S
2
(35 days old seedling and 2
seedlings hill
-1
), and the lowest straw yield (3.66 t ha
-1
) was observed in the treatment
combination of D
1
S
3
(25 days old seedling and 3 seedlings hill
-1
). The 35 days old seedlings
planted in 2 seedlings hill
-1
showed a better response in most of the studied parameters.
Description:
A Thesis Submitted to
The Department of Agronomy, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTERS OF SCIENCE (MS)
IN
AGRONOMY
