Abstract:
A pot experiment was conducted under the net house of Sher-e-Bangla Agricultural
University (SAU), Dhaka, Bangladesh, during November 2019 to April 2020, to
investigate the improvement of late sowing. Boro seedling characters and yield by using
chitosan raw material powder in seedbed soil. The experiment was consisted of two
factors and following Completely Randomized Block Design (RCBD) with four
replications. Factor A: Level of chitosan raw material powder(w/w) (06) viz; T
1
= 0%,
T
2
= 0.1%, T
3
= 0.2%, T
4
= 0.3%, T
5
= 0.4% and T
6
= 0.5% and Factor B: Different
seedling Number hill
- 1
(3) viz; S
1
=Single seedling hill
- 1
. S
2
= Two seedling hill
and
S
3
= Three
seedling
hill
- 1
. Experimental results revealed that among different levels of
chitosan raw material powder, maximum average seedling height (21.93 cm) was
obtained in T
(0.4 % chitosan raw material powder) treatment.
Seedling treated with
T
2
(0.1%) treatment perform
well
fresh weight seedling
5
-1
(371.33 mg), oven dry weight
seedling
-1
(83.337 mg), maximum seedling strength (4.65 mgcm
-1
- 1
)
,
grain yield pot
(69.85 g)
,
maximum
harvest index (50.54 %).
In case of different seedling number hill
1
,
effective tillers pot
-1
(22.67), first flowering (65.66),
maximum grain yield pot
(65.168 g),
the maximum harvest index (49.46%) was
obtained in S
1
(Single seedling
hill
-1
)
. In case of combined effects, The maximum grain yield pot
-1
(76.27 g)
was
obtained in T
3
S
1
treatment combination. Chitosan raw
material powder strongly
improved the seedling characters at single seedling number hill
-1
, yield and yield
attributing characters of BRRI dhan88.Thus for cultivation of BRRI dhan88, it is
suggested that optimum level (0.1%) of chitosan raw material powder could be applied
in the seedbed soil along with transplanting single seedling hill
-1
perform well for
obtaining higher grain yield.
