Abstract:
A field experiment was conducted at the Experimental Field of Sher-e-Bangla
Agricultural University, Dhaka from July to December, 2017 to investigate the
comparative morphological, phenological and yield traits of some Aman rice
varieties. Ten BRRI released Aman rice varieties viz. BRRI dhan40, BRRI
dhan41, BRRI dhan44, BRRI dhan51, BRRI dhan52, BRRI dhan53, BRRI
dhan54, BRRI dhan56, BRRI dhan57 and BRRI dhan62 were used as test
crops. The experiment was laid out in RCBD design with three replications.
Among the studied characters, plant height, number of total tillers hill
, flag
leaf length, flag leaf breath, flag leaf area, penultimate leaf length, penultimate
leaf area, panicle length, 1000-grain weight, grain yield and biological yields
were significantly varied due to varietal difference. BRRI dhan44 produced the
highest number oftotal tillers hill
-1
(21.1), flag leaf area (85.33 cm
) and
penultimate leaf area (93.83 cm
2
), productive tillers hill
-1
(20.0), fertile grains
panicle
-1
(124.11) and least number of non- productive tillers hill
(1.5) and
sterile grains panicle
-1
(7.39) followed by BRRI dhan54 produced the number
of total tillers hill
-1
(17.0), flag leaf area (74.86 cm
2
) and penultimate leaf area
(88.36 cm
2
). BRRI dhan44 takes the minimum time for panicle initiation (70
days), booting stage(80 days), panicle emergence (83 days), 50% flowering (91
days), milky stage (100 days) and dough stage (109 days) among all Aman
varieties. BRRI dhan62 produced the lowestnumber of total tillers hill
(10.5),
flag leaf area (37.89 cm
2
) and penultimate leaf area (33.47 cm
). The yield
contributing attributes viz. 1000-grain weight (36.38 g), The grain yield (6.23 t
ha
-1
) and biological yields (15.58 t ha
-1
) were produced by BRRI dhan44which
were the highest followed by1000-grain weight (35.00 g). The grain yield (5.27
t ha
-1
) and biological yields (14.23 t ha
-1
) were produced by BRRI dhan54.
BRRI dhan62 produced1000-grain weight (24.13 g). The lowest grain yield
(3.74 t ha
-1
) and biological yields (11.22 t ha
-1
) were produced by BRRI
dhan62.
2
-1
-1
-1
2
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 (MS)
IN AGRICULTURAL BOTANY
SEMESTER: JANUARY- JUNE, 2018
