Abstract:
A field experiment was conducted in the experimental field of Sher-eBangla
Agricultural
University,
Dhaka
to
determine
the
effect
of
nitrogen
levels
and
row
spacing
on
growth
and
yield
of
rapeseed.
The
experiment
consisted
of four levels of nitrogen i.e. 69 kg N ha
-1
(Urea=150 kg ha
)(N
1
), 92 kg N ha
-1
(Urea=200 kg ha
-1
) (N
2
), 115 kg N ha
-1
(Urea=250 kg
ha
-1
) (N
3
) and 138 kg N ha
-1
(Urea=300 kg ha
-1
) (N
); and three row
spacing i.e. 20cm (S
1
), 30cm (S
2
) and 40cm (S
3
4
). The experiment was laid
out in a two factors split-plot design with three replications assigning
nitrogen levels in the main plot and row spacing in the sub plot. Nitrogen
levels, row spacing and their interactions had significant effect on plant
height, number of branches plant
-1
, number of siliquae plant
, siliqua
length, number of seeds siliqua
-1
, 1000-seed weight, seed yield, stover
yield, and harvest index of rapeseed. The application of N @ 115kg ha
(Urea=250 kg ha
-1
) (N
3
) produced the highest seed yield(1393.3kg ha
)of
rapeseed showing the highest value for all the yield parameters except
harvest index. The S
(30 cm row spacing) treatment produced the highest
seed yield (1060.8 kg ha
2
-1
) of rapeseed also showing the highest values
for the mentioned parameters. Application of N @ 115 kg ha
with 30
cm row spacing (N
3
× S
) produced the highest seed yield. The lowest
yield was found in N
2
2
(855.6kg ha
-1
), S
1
(1140.8kg ha
-1
-1
-1
) and N
(1393.3kg ha
-1
) combination.
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
