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 effect of chitosan raw material powder and seedling age on the
performance of BRRI dhan88. The experiment was consisted of two factors and
following Randomized Complete Block Design (RCBD) with four
replications. Factor
A: Level of chitosan raw material powder viz; C
0
= 0%, C
1
= 0.1%, C
=
0.3%, C
4
= 0.4% and C
5
= 0.5% and Factor B: Different seedling age viz; S
= 25
days old seedling, S
2
= 30 days old seedling and S
= 35
days old seedling.
Experimental results revealed that among different levels of
chitosan raw material
powder, seedling treated with C
4
(0.4 %) treatment a n d S
3
(35 days old seedling)
perform
well and recorded the maximum average seedling height (20.45 cm), fresh
weight per 100 seedling (44.6 g), oven dry weight per 100 seedling (
17.2 g
), seedling
strength (
8.41
mgcm
-1
) , effective tillers hill
-1
3
(22.75), minimum days for first
flowering (74.5), minimum days for 50 % flowering (77.2), minimum days for 100 %
flowering (79.25), maximum grain yield pot
-1
2
= 0.2%, C
(68.91g), maximum straw yield pot
(85.5 g), maximum biological yield pot
-1
(153.45 g).
Chitosan raw
material powder
also have some positive residual effect on pH, total nitrogen, organic carbon and
organic matter.
Chitosan raw
material powder strongly improved the seedling
characters at low temperature conditions, yield and yield attributing characters of
BRRI dhan88. Thus, for cultivation of BRRI dhan88, it is suggested that optimum
level (0.4%) of chitosan raw material powder could be applied in the seedbed soil
along with transplanting young (35 days old) seedling perform well for obtaining
higher grain yield.
