Abstract:
A field experiment was conducted at Agronomy research field, Sher-e-Bangla
Agricultural University (90°33' E longitude and 23°77' N latitude), Dhaka,
Bangladesh during November, 2012 to March, 2013 in
rabi
season with a view
to find out the influence of source of nitrogen and different weed control
methods on growth and yield of wheat. The experiment was carried out with
four different sources of nitrogen
i.e.
N,,= control (no nitrogen fertilizer), N
1
urea supergranules (1.8 g) @ 60 kg N ha',
N2=
urea supergranules (2.7 g) @
90 kg N ha
1 and N3
= prilled urea (92 kg N ha
d
) in the main plot and four weed
control methods viz. W
0
= control (no weeding), W
j= two hand hoe weeding at
20 DAS and 40 DAS, W
2
= Topstar 80WP (Oxadiargyl 400 g L) @ 75 g h&'
as post-emergence and W
3
= Sunrice 150WG (Ethoxysulfuron 150 g kg') @
100 g ha
1
as early post-emergence herbicide in the sub plot in split plot design.
The highest (4.10 t ha
1
) grain yield was recorded from application of urea
supergranules 1 .8g (N
1
) and urea supergranules 2.7g (N
2
) produced the second
highest (3.64 t ha) grain yield. Urea supergranules 1.8g (N
1
) produced highest
(259.6)
total tiller m 2
, the highest (305.6) effective tiller m
2
, higher (17.20 cm)
spike length, highest (18.27) number of spikelets spike', the highest
(53.28)
number of filled grains spike
d
, the highest
(52.15
g) 1000-grain weight. And
thus it recorded the highest (4.10 t ha') grain yield, highest
(5.54 t had
) straw
yield, maximum (9.64 t ha
1
) biological yield and the highest (42.34 %) harvest
index. Among the weed control methods Sunrice 1 5OWG (W
3
) produced the
highest (3.86 t ha
d
) grain yield, the highest
(5.32
t ha') straw yield, the highest
(9.18 t ha') biological yield and the highest (41.26 %) harvest index. Among
the source of nitrogen treatments urea supergranules 1.8 g (N
1
) produced the
highest (2.04) benefit cost ratio and Sunrice 1 5OWG (W
3
) produced the highest
(2.24) benefit cost ratio among the weed control methods.
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
