ALLELOPATHIC EFFECT OF Brassica BIOMASS TO CONTROL WEEDS AND YIELD OF WHEAT
Date
2009
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF AGRONOMY
Abstract
The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh during the period from October 2007 to February 2008
to study the al]elopathic effect of
Brassica
biomass to control weeds and yield of
wheat. The experiment consisted of two factors of which Factor A: 3 kinds of
Brass/ca
species viz. Si:
Brass/ca campesiris. S
2: Brass/ca juncea
and S
3
: Brc:ssica
napus
and Factor B: incorporation methods of
Brass/ca
biornass (5 levels) like: B
0:
Control (no bioniass application); B
1
: Spreading above the ground; B
2
: Mixed with
soil; B3
: Spreading in line and B
4:
50%
spreading + 50% mixed with soil. At 30 days
after sowing (DAS), the maximum numbers of weeds
(25.53
n12
) were found in the
plot treated with Brass/ca funcea
which was 44. 81°/a higher than
Brass/ca campesiris.
At 50 DAS. Bras's/ca juncea
also showed the highest weed population (20.20 m
2).
However, Brass/ca campes Iris
resulted with the best effect on weed control showing
the least number of weed population (14.07 rn
2
). At 30 DAS, the lowest weed
population (15.33 m 2
) was seen by 133
while the highest (26,89 m
2
) was found in the
B2
. At 50 DAS, the highest (20.89
1112)
weed population was found by B
2
whereas. B4
showed the lowest (13.11 m) population. S
1 B2
showed the lowest density of weeds
(8.67n12
) at 50 DAS which was significantly lower than S
2B0 (37.33n12
) and S3B2
(40.00m 2
) at 30 and 50 DAS respectively. Among the
Brass/ca
species, S
2 produced
the highest grain yield (3.52 t ha
d
) while the lowest (3.32 t ha
d
) was obtained from S.
The highest grain yield
(3.54
t ha
d
) was recorded from B
0
while the lowest (3.32 t ha
')was recorded from B2
. The S2 B1
had the highest grain yield (3.83 t ha") whereas the
lowest (3.06 t ha") was recorded from S
3B1
. It is appeared from the above results that
Brass/ca canzpeslris
and B4
incorporation method was mostly effective in controlling
weed. But yield was not affected by both species and incorporation methods
Description
A Thesis
Submitted to the Department of Horticulture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
Keywords
Brassica BIOMASS, CONTROL WEEDS, WHEAT