Abstract:
To investigate the performance of aromatic rice (cv. BRRI dhan34) in response to
seedling age and nutrient management, an experiment was carried out at the Sher-eBangla
Agricultural
University,
Dhaka
from
July
to
December
2021.
The
experiment
includes
three different ages of seedlings to be transplanted viz. 30, 45, and 60 days
old, and six nutrient management practices viz. control (no manures and fertilizers),
recommended dose of inorganic fertilizers (RDF) (150, 97, 70, 60, and 12 kg ha
urea, TSP, MoP, gypsum, and zinc sulphate, respectively), 50% of RDF + cow dung
@ 5 t ha
-1
, 75% of RDF + cow dung @ 5 t ha
ii
-1
, 50% of RDF + poultry manure @ 2.5
t ha
-1
and 75% of RDF + poultry manure @ 2.5 t ha
-1
. The experiment was laid out in
a randomized complete block design with three replications. The results revealed that
in the case of transplanting of different aged seedlings, the highest number of tillers
hill
-1
(13.17), number of effective tillers hill
-1
(11.53), plant height (113.34 cm), leaf
area index (5.74), total grains panicle
-1
(135.14), 1000- grain weight (12.45 g), grain
yield (3.29 t ha
-1
), straw yield (4.01 t ha
-1
), biological yield (7.30 t ha
-1
) and dry matter
hill
-1
(32.86 g) were recorded from transplanting 30 days old seedlings. Different
levels of nutrient management showed a significant impact on most of the parameters
under study. The highest plant height (115.70 cm), the maximum LAI (5.35),
chlorophyll content (42.87), total dry matter hill
-1
(34.02 g), number of effective tillers
hill
-1
(12.99), panicle length (24.63 cm), total grains panicle
-1
(140.17), 1000-grain
weight (12.54 g), grain yield (3.27 t ha
-1
), straw yield (4.15 t ha
-1
), biological yield
(7.42 t ha
-1
) and harvest index (43.03%) were also recorded in F5 (75% of RDF +
poultry manure @ 2.5 t ha
-1
) treatment. While considering the interaction effects
between the age of seedlings and nutrient management, transplanting 30 days old
seedlings along with the nutrient management of 75% of RDF + poultry manure @
2.5 t ha
-1
treatment improved yield contributing parameters and provided the highest
yield (3.76 t ha
-1
) of BRRI dhan34 compared to other treatment combination. So, the
application of 75% of RDF + poultry manure @ 2.5 t ha
-1
along with 30 days old
seedlings appeared as a promising practice to obtain better performance of fine
aromatic rice (cv. BRRI dhan34).
Description:
A Thesis
Submitted to the Department of Agricultural Botany,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements for the degree of
MASTER OF SCIENCE (M.S.)
IN
AGRICULTURAL BOTANY
