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The Development of Invasive Alien Plant Species Management In the Framework of Rehabilitation of Invaded Ecosystems at Gunung Gede and Pangrango National Park
Abstract
Chimonobambusa
quadrangularis (Franceschi) Makino, is
an invasive alien bambu species, belonging to Poacae family , originated from
China and Formosa (Suzuki 1978). However
this species was introduced from Japan
around 1920 to Cibodas Botanical Gardens (Widjaja 2001). It
spreads vegetative via the belowground rhizome carrying bud in each nodes. Mutaqien et al. (2011) suggested that this bambu invaded Gunung Gede and
Pangrango National Park, since this bambu has been utilised as the fence
separating the Cibodas Botanical Garden area. Driven by this recommendation activities
were organised and researches were designed to study the control and the
eradication of this bambu. A factorial experimental design was carried out
combining two factors, one was slashing
of bambu culm consisting of 2 levels, i.e. slashing the culm by leaving (1) one nodes, and (2) slashing culm leaving
3 nodes. The second factor was tretments consisting of 4 levels, (1).
Slashed at monthly interval, (2). after slashing the cut culms were
immediatelly brushed with 10% triclopyr disolved in diesel oil, (3). 2 months
after slashing the growing shoot were
sprayed with equivalent glyphosate at 6 l/ha in 400 l water/ha with a knapsack
sprayer, (4), slashing at 2 months interval. The experiment was carried out in
GGPNP on an area dominated by bambu kersik under the trees of rasamala
(Altingia exelsa). The combined treatments were 8 and replicated 3x tgiving a
total of 24 plots. The plots were 2x 3 m2 delineated around by a ditch of 25 cm
wide. C.quadrangularis (bambu kersik) is a strongly rhizomatous
perennial bambu which proliferates well
under the condition of mild environment of Pangrango Mountain. even
under the shade of trees. Due to its
rhizomatous growth form and intermingling of different genets, C. quadrangularis genets are very difficult to identify in the
field. The bambu culm density in plot
varied from 26 -62 culms/plot, statistically they were not different
significantly with the mean 39.29 ±9.9 culms/plot. slashing followed by brushing with triclopyr at 10% disolved in diesel
oil was good enough to control the growth of bambu culm, Two months after
treatments, analysis of Variance on data of total living bamboo culms in each plots
indicated no interactions among the
factors, but each factors affected the number of living bambu culms significantly. The mechanism of
expansion was deliberatly proposed.
Another set of observation was done at another location to have a duplicate. Three bambu kersik community sites of different
ages are to be identified, and selected as plots, these plots shall be widely
apart and the sampling metods will be carried out as the following: 1. Two line transect of 50
m are laid randomly in each plot. 2. A single bambu kersik culm along the
tansect will be selected at random and a kuadrat of 1 x 1 m is laid
perpendicular to the transectat an interval of 10 m. 3. The sampling will be
carried out from August to October each month to obtain a representative
distribution of ramet, rhizome, bud and tillers.
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