ALLELOPATHIC EFFECT OF MIKANIA (Mikania micrantha) IN KHARIF SEASON TO CONTROL Fymbristylis miliacea WEEDS
M.J.Ullah*,
J. Rahman, M. Yeasmin, K. Fatima, M.
Quamruzzaman
*Corresponding author; E-mail: Jafarullahsau@gmail.com
Abstract
The experiment was conducted at the weed museum of Sher-e-Bangla
Agricultural University, Dhaka to evaluate the allelopathic effect of mikania
on Fymbristylis miliacea during
kharif season of 2013. Soil from the
wheat field was collected, dried in sun and mixed with mikania fresh plants at 6 different rates (control, 2%, 4%, 6%, 8% and 10%; all of sundried soil by
weight) and allowed weed seeds to germinate and grow within the soil in earthen pots. Results revealed that mikania (M)
application showed significantly lower population of Fybristylis weed plant at
30 to 60 days after setting (DAS). Treatments
4 - 10% in comparison to control showed
significantly lower number of Fymbristylis
miliacea (46 - 76.50 pot-1 than the control (60.50 - 136.33
pot-1) reducing the Fymbristylis
miliacea population by 34 - 44% due to mikania application. But higher
plant heights (up to 38.50cm) were obtained with these treatments than control
(up to 31cm). In contrast to the
population, Fymbristylis dry weight increased due to mikania application after
30 DAS. The highest above ground biomass of 5.33g pot-1 was obtained
with 10% mikania at 60 DAS while the lowest of 5.04 - 5.37g pot-1
with control and M2 (i.e. 2%). M8 and M10 had significantly higher
root biomass than others (up to 0.72g pot-1) at 45DAS than the non-treated
ones (0.40g pot-1) and the mikania applications at 4-6% had
significantly higher total biomass ranges of
around 6 g pot-1 at 60 DAS as compared to those of other stages (2.0 - 5.5 g pot-1).
Mikania application also showed increased ranges of per plant biomass (0.097-0.120
g plant-1) at 60 DAS than control (0.045 g
plant-1). Total number of all
weeds pot-1 increased from 30 DAS (117- 156 pot-1) to 60 DAS
(151 - 271 pot-1) and thereafter decreased at 90 DAS (66 - 141 pot-1)
showing significantly the highest values with control. Conversely, mikania application increased
the total weight of weeds (45 - 50 g pot-1) compared to control
(30.55 g pot-1). Relative percentage by number (32 - 46%) of Fymbristylis miliacea gradually decreased
due to mikania application by 12 - 25% over mikania treatments. In contrast,
relative percentage by weight (11 - 21%) increased from 18 - 31% over the
treatments. Fymbristylis miliacea control
efficiency due to mikania application in respect of population significantly
increased up to 22 - 64 over control. However in respect of dry weight, it was
found only at 30 DAS (61 - 104%) over control.
Key words: Mikania,
allelopathy, Fymbristylis
miliacea and weed control.
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Return Volume: Journal of Experimental Biosciences 5(2): July 2014
