Abstract:
Role of chitosan powder on the production of quality Boro rice seedlings and its effect on
yield was examined. The experiment was conducted at the farm of Sher-e-Bangla
Agricultural University, Dhaka. There were six treatments and three replications in the
experiment. The treatments were as follows: T
1
= 100 g powder/m
2
, T
2
= 200 g powder/m
,
T
3
= 300 g powder/m
2
, T
4
= 400 g powder/m
2
, T
5
= 500 g powder/m
2
, T
6
= 0 g powder/m
. A
significant variation was observed in the seedlings height, biomass production and chemical
properties of the seedbed soils due to the application of chitosan powder in the seedbed. The
maximum seedlings height, fresh weight, oven dry weight were observed in the treatment T
and the minimum seedlings height, fresh weight and oven dry weight were recorded in the
treatment T
, control. Whereas, the maximum level of organic carbon, organic matter and soil
pH were recorded in the treatment T
6
and the minimum level of organic carbon, organic
matter and soil pH were recorded in the treatment T
5
, control. Chitosan powder increased the
level of organic matter in a dose dependent manner. Quality of the rice seedlings were
improved due to the application of the chitosan powder in a dose dependent manner and the
treatment T
4
(400 g powder/m
2
6
) was the more effective than other treatments. All the
treatments were produced good rice seedlings having more chlorophyll level than control
treatments. Application of chitosan increased plant height, effective tillers hill
, number of
panicle/m
2
, panicle length, grain yield and straw yield over control. Most of the
morphological, yield attributes and grain yield were increased with increasing the dose of
chitosan in the seedbed. Maximum grain yield was observed in T
4
-1
treatment followed by T
,
T
5
, T
2
,T
1
and T
(control). Results indicate that primary tiller production become earlier,
effective tiller become higher, flowering and maturity time become earlier resulting higher
yield. These results might be due some growth promoting hormones (especially GA3, Auxin
etc.), soil alkalization nature and other some macro-micro nutritional supplementation which
might be induced some early flowering genes (ELF1, ELF2, ELF3).
6
2
2
4
3
Description:
A Thesis
Submitted to the Department of Soil Science
Sher-e-Bangla Agricultural University, Dhaka,
In partial fulfillment of the requirements
For the degree of
MASTER OF SCIENCE (M.S.)
IN
SOIL SCIENCE
SEMESTER: JULY-DECEMBER, 2016
