Abstract:
A field experiment was conducted at Agronomy field laboratery, Sher-e-Bangla
Agricultural University (SAU), during July- December, 2010 with a view to fmd out
the varietal performance of
aman
rice as affected by different methods of urea
application. The experimental treatments included four varieties i.e. BRI I, BRRI
dhan33, BRRI dhan39, BRRI dhan46 and four urea application methods viz. 15 kg N
hi' as prilled urea at final land preparation + 15 kg N hi' as prilled urea at 30 DAT+
15 kgN hi' as prilled urea 50 DAT; 15 kgN hi' as prilled urea at 7 DAT + 15 kg N
hi' as prilled urea at 30 DAT + 15 kgN ha
4
as prilled urea at 50 DAT; 60 kg N hi'
USG (1.8 g) at 7 DAT; 15 kg N hi' as prilled urea at 15 DAT+ 15 kg N hi' as prilled
urea 30 DAT+ 15 kg N hi' as prilled urea at 50 DAT. The experiment was laid out in
a split- plot design with three replications having urea application in the main plots
and variety in the sub-plots. The results showed that urea fertilizer application method
significantly influenced plant height, tillering production, leaf area index, effective
, unfilled grains panicl&', total grains panicle',
tillers hilr', filled grains panicle
4
1000-grain weight, grain yield, straw yield, biological yield and harvest index.
Application of USO N as at 7 DAT gave highest yield (7.82 t hi') while application
of 15 kg N hi' as prilled urea 30 DAT+ 15 kg N
hi'
as prilled urea at 50 DAT gave
Varitetal influence were significant on tillering pattern, leaf
area index, effective tillers hill
4
, filled grains panicl&',lOOO- grain weight, grain yield,
lowest yield (4.88 t hi').
hi')
which was
statistically similar with BRRI dhan46 (7.3 t hi') while the lowest yield obtained
straw yield and biological yield. BRI1 gave the highest yield (8.17 t
from BRRI dhan33 (2.87 t hi'). Interaction effect of 1.8 g USO along with BR1 1
showed the highest effective tillers hilr' (14.00), 1000-grain weight (30.32 g), grain
yield (10.67 t hi'), straw yield (12.00 t hi') and biological yield (22.67 t hi').
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY