RUMPUT VETIVER - AKAR WANGI ( PENGENDALI EROSI TANAH DARI LONGSOR )
RUMPUT VETIVER
What Is Vetiver Grass ? Rumput Vetiver, Chrysopogon zizanioides
General Information on Vetiver Grass
Vetiver
grass is a tropical plant which grows naturally. In Thailand, vetiver
grass can be found growing in a wide range of area
from highlands to lowlands in various soil conditions. The
species which is most common in Thailand is referred to in scientific
term as Vetiveria zizanioides. This species appears in a dense clump
and grows fast through tillering. The clump
diameter is about 30 cm. and the height is 50-150 cm. The leaves are
erect and rather stiff with 75 cm. of length and 8 mm. of width.
If planted along contours across
the slope, the clump which stands above the ground will produce
tillers, forming a green hedge. This thus makes it capable of trapping
crop residues and silts which are eroded by runoff and enabling them
to naturally form an earth embankment. Since
vetiver grass has a deep thick root system which spreads vertically
rather than horizontally, it can efficiently endure harsh conditions.
The roots densely bind together like an
underground curtain or wall enabling it to store water and moisture.
However, since the root system expands sideway up to only 50 cm., it
imposes no obstacle to the nearby plants and is thus considered an
effective measure for soil and water
conservation. Vetiver hedgerows maintain soil moisture and soil surface
and at the same time, are suitable for cultivating along with economic
crops. Growing vetiver grass is simple,
applicable and money-saving. The practice can lead to the strengthening
and sustainability of the farming system in rainfed areas and can be
applied in other areas for preservation and conservation of natural
resources such as along the banks of the
irrigation canals, reservoirs or ponds along the road shoulders and the
approach of a bridge, as well as in forests.
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