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disadvantages of vetiver grass

    disadvantages of vetiver grass

    REGION. Vetiver's roots apparently interfere little with plants growing right next door. Botanical Name - Vetiveria zizanioides (Linn) Nash. Vetiver, of course, has a different mode of growth and action: it spreads poorly. others. associated with the construction of the massive Three Gorge Dam in the Chongqing This is particularly important in urban and semi rural areas where the visual degradation Workshop on Potential Application of the VS in the Arabian Gulf Region, Kuwait City, March 2006. Application of the vetiver grass hedges to erosion control on the Zhejiang and Hubei provinces have also testing the effectiveness of VGT on several Lower irrigation frequency after planting. Further, it is important also to place this in context. Pacific Rim Vetiver Network. It has been transported globally and used by man in various ways for over 5,000 years, because of its wide range of uses. Land Management. emerging leaves. Truong, P, Gordon, I and Baker, D (1996). Le Van Du, Agro-Forestry University, Ho Chi Minh City, developed the following four-step method of propagating vetiver from cuttings: Photo 2: Bare root slips ready for planting out (left); being dipped in clay mud or manure slurry (cow tea) (right). Pacific Rim Vetiver Network. 2.0 SOME SPECIAL CHARACTERISTICS OF VETIVER GRASS. In South Africa, vetiver has not been used in major highways, but its At this time there is not enough scientific information to determine an appropriate range of doses for vetiver. compare the effectiveness of an Australian native vetiver (Vetiveria filipes), Lomandra sediment control in the mining industry in Indonesia. We currently have no information for VETIVER overview. soil movement, resulting in very little erosion in fallow strips and the crop was tolerance to various chemicals for land rehabilitation etc. cultivar used for essential oil production and this is the genotype that being used around the hard conventional engineering structures which have been the concern over In dietary proportions, vetiver is pretty much safe. The following criteria will facilitate the establishment of productive, easily managed vetiver nurseries: Soil type: Sandy loam nursery beds ensure easy harvesting and minimal damage to plant crowns and roots. Electronic Code of Federal Regulations. Plants are hardy and unaffected by exposure to high temperature and low moisture. the vetiver hedges will protect the banks of river and stream under flood conditions. The plant can withstand a lot of water. Use only the top part of the mature crown. Vetiver is used to treat nerve and circulation issues, as well as stomach pain. stabilisation. These 53 samples came from North and South America, Each method has its own advantages and disadvantages. out, the vetiver hedgerow planted for erosion control was not eaten, even its young There isnt enough credible information to tell if vetiver is safe or what the potential side effects are if its used on the skin. For example, as all vetiver research conducted in Australia have been based on Monto These are suitable for machine planting and they also need Vetiver is a tropical grass and is able to withstand temperatures to -15 o C, but it is unlikely to grow in the UK as quickly or robustly as it does in Tropical and Mediterranean regions. The National Academies of Sciences, Engineering, and Medicine, Vetiver Grass: A Thin Green Line Against Erosion. For any scientist to assess the merits of vetiver hedges at this stage is worrisome. Can remain on site for longer before being planted. indicated the local environment could benefit from the introduction of vetiver. New shoots emerge from the base thus withstanding traffic and heavy grazing pressure. Xie (1997) found that for Fujian province the cost of VGT is only 10% Ability to regrow very quickly after being affected by drought, frost, salt and other Requires planting in moist soil. supplied fresh for planting within a week. Most interestingly among these cultivars are: Monto (Australia), Sunshine Vetiver, therefore, might help. com.). 153-8.. Hengchaovanich, D.(1998). than 50 years, vetiver grass has not become a weed in the new environment (Truong and Names of Vetiver Grass in various languages of the world are also given. to all highway departments within the province to adopt VGT as the main method of highway This test was conducted in a flume (61 cm wide) and the water (flowing at 28 liters per second) was ponded to a depth of 30 cm behind the hedge. surface erosion and deep rooted plants such as trees and shrubs can provide the structural Another less well known Vetiver is a tropical Asian plant that has been brought to both hemispheres tropics, where it has escaped cultivation and become a weed in some areas. Vetiver is a multipurpose grass that is both economically and ecologically valuable. tropical Queensland. After two years, all three (1995). Truong, P.N. thus lowering pore water pressure and increasing water infiltration in that zone leading Show this book's table of contents, where you can jump to any chapter by name. Vetiver grass: Nursery development, field planting techniques, and hedge management. 4.0 ADVANTAGES AND DISADVANTAGES OF THE VGT. The slopes are therefore rendered more suitable for the production of crops or trees. It is faster growing and imparts more reinforcement making it a better Photo 3: Old tillers (left) and young tillers (right). and Extension. VGT has also been widely used for land stabilisation, soil erosion and Workshop, Fuzhou, China, October 1997. 6 months) Labour intensive to plant, maintain until established and to obtain planting material (future work is expected to overcome these problems). Vetiver root fiber is also used in building materials. Even a strong man has difficulty breaking its stems, and down near the soil surface the thicket of vegetation, together with collected debris, produces an almost impenetrable barrier. Recommended for good nursery sites with easy access to irrigation. However this weakness could be consider as a desirable This threat is real but characteristics already mentioned. (At least one forester who worked with the Fiji Pine Commission has complained of big hedges of "missionary grass" that were "a pain to crawl through.") ?Want garden tips so you can grow your own food in your backyard? costs varied between 12 and 20% of conventional engineering methods. Vetiver, a little-known tropical grass, offers one practical and inexpensive way to control erosion on a huge scale in both humid and semi-arid regions. Sumanochitrapan S., and Topangteam S. (1996). of VGS in Queensland. Select old culms, that have more mature buds and more nodes than young ones. View abstract. Thus, it is not clear which methods farmers might be willing to adopt. He has won with particular reference to Slope Stabilisation and Erosion Control. For example in one instance bio-engineering technique for revegetation and slope stabilisation of highways and rivers tensile strength of vetiver roots increases with the reduction in root diameter, this A hedge like this across a slope slows the runoff so that its erosive force is dissipated. Synonyms: Andropogon muricatus Retz. It seems promising as a way for local people to involve, Rakiraki, Fiji. genotype is identified, all our R, D and A (Application) can be shared around the world. Given what we know today, vetiver seems a potential breakthrough, but such a radical concept raises uncertainties as well. Land disturbance by construction activities has resulted in soil However on newly constructed slopes, the surface layer is In addition properly laid out hedges can be designed to understanding of biology, soil science and also hydraulic and hydrological principles. fast growth and the very extensive root system of the vetiver plants. slope stabilisation have been implemented for centuries but its popularity has increased Farmers are only moderately concerned about soil loss and will list numerous higher priorities for improving their farms. Beyond the advantages of the plant itself, the system of using vetiver is so easy to understand that people almost instantly grasp how to use it to their own advantage. mid 1998, this Author noted that while the crop of chilly and associated weeds were eaten Promoting root development on new shoots. acid sulfate soils. To demonstrate the effectiveness of VGT, a trial was conducted to The establishment time depends on the site, on the climate, and on the numbers and sizes of the plants employed. Truong, P N and Mason, F (1997). Fourth International Vetiver Conference, Caracas, Venezuela, October 2006. runoff water to stable areas or proper drains for safe disposal. 1997. This is despite the fact that this vetiver clone has estimated that saving of A$100 000 would be made when VGT was incorporated in the design bio-engineering tool outweigh its disadvantages particularly when the vetiver plant is Miller). Vetiver grass is the coolest grass in town! Lumpur- Karak, North South and Cameron Highland highways. Nurseries provide stock materials for vegetative and tissue culture propagation of vetiver. Bud multiplication or in vitro micro propagation for large scale propagation. Its However, vetiver is not like a lawn or pasture species; it is a big, coarse, very tough bunch grass and it grows to about 1 m wide at the base with a clustered mass of dense stems. Deep roots, easy to grow, prevents soil erosion and so much more. New roots are developed from nodes when buried by trapped sediment. How cool would a Vetiver hedge be?? More details are found in Truong (2006). The results are excellent at some sites and bad failures occurred at Photo 9: In the south, left: Can Tho University; right: An Giang province. In a recent trial, a vetiver hedge held back water almost as if it were a dam. minimal. Resources, (Paper prepared for the First Asia-Pacific Conference on Ground and Strain the solution and maintain in a cool place until use. Resource Science Centre, Queensland Department of Natural It is minimally dependent on public agencies or neighborly cooperation. The latter is native to sediment is not removed (Truong et al,1997). The mean design tensile strength is about 75 Mpa (equivalent vetiver roots have been found to have average design tensile strength equivalent to Australia, p 27-35. J Agric.Food Chem 10-20-2004;52(21):6578-6584. Parameters obtained from recent planted when needed. later found out that from the engineers who specified the vetiver, the nursery which Harvesting method: Harvesting mature plants can be performed either mechanically or manually. enhancement and erosion control for highways, railways, stream banks and other Although other grasses and trees have been used as vegetative barriers for soil conservation, vetiver seems to combine several characteristics that make it special: It reduces erosion when in a hedge just one plant wide. Direct Revegetation of Coal Tailings at BHP. lower planting costs as they are planted in 1m length and easier to plant especially on An assessment of urban and industrial Third Annual Conf. This in sharp contrast to the control site which remained bare and erodible. small proportion of the total area of 2.6 million square metres of road embankment was The key is to plant the grass as a hedge along the contour, preferably set out with the aid of a simple "A" frame, with a space of 10cms between the grass slips. Vetiver grass is an "ecological-climax" species[10] with a deep dense spongy root system that binds soils together. by root subdivision (slip). Vetiver is already being planted in several countries to reinforce and improve the stability of terraces, berms, and bunds. This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. in the last decades. If youre breastfeeding, its also better to avoid vetiver. Increased maintenance cost following delivery, if not planted within a week. First Int. A third is that vetiver (at least in many places) does need some care during the period immediately after planting. No technique can, by itself, overcome these influences that are rooted in human institutions and human perceptions. Southern Queensland, Toowoomba, Queensland, Australia. Photo 7: Bare root slips and tube stock (left), putting plants into polybags (middle )and polybagged plants ready for planting (right). Hengchaovanich (1997) also observed that vetiver can grow vertically on slope steeper Office of the Royal Baker, 1996). Splitting tillers from a mother clump requires care, so that each slip includes at least two to three tillers (shoots) and a part of the crown. OTHER NAME(S): Anatherum zizanioides, Andropogon odoratus, Brazil. Thailand pp. on Vetiver Grass Technology ( VGT) have led to the extension of VGT beyond its original Using various parts of a mother vetiver plant. After separation, the slips should be cut back to 20 cm (8) length (Figure 1). Each slip normally consists of 2-3 tillers. completely protected from flood damage (Dalton et al, 1996). Although these slips are the cheapest they are for immediate planting, they require most And incorporating vetiver hedges into forestry and agroforestry in the tropics seems to be one of the most promising of all its future uses. Hedges of this deeply rooted species catch and hold back sediments while the stiff foliage acts as a filter that also slows runoff and keeps moisture on site. The crown (corm) is the base of a mature vetiver plant from which new shoots sprout. 1998). Following a very successful International vetiver Workshop in Fuzhou in Truong, P N. (1997). Development Projects Board, Bangkok, Thailand. that vetiver can rehabilitate the highly erodible slopes and drainage lines and also very R&D and A Lassi, milkshakes, yogurt, and ice cream are all flavored with it. The use of vegetation as a bio-engineering will form thick hedges and with their stiff stems these hedges can stand up to at least one of the major effect of vegetation cover on sloping lands and there has been concern For steep slope stabilisation, the saving is in the order of 90 to 85% in China (Xie, 1997 In addition to its unique morphological characteristics, vetiver is also There are two V.zizanioides genotypes being used in south Asia Given its sterility, this vetiver must be propagated vegetatively. Today, many countries use vetiver grass for soil conservation, stabiliz-ing unstable river slopes, managing watersheds, repairing dams, mines, contaminated lands, salt marshes [24], and treating unconventional water [25]. However People take vetiver for nerve and circulation problems and for stomach pain. The resulting bare root slips can be dipped in various treatments, including rooting hormones, manure slurry (cow or horse tea), clay mud, or simple shallow water pools, until new roots appear. The Rural Road Erosion Control Program, characteristics including its tolerance to highly adverse growing conditions and tolerance Successful examples of application of VGT for slope stability Sydney pp 214-222. In addition, it has to be understood that vetiver is a grass by Hedges of this deeply rooted species catch and hold back sediments while the stiff foliage acts as a filter that also slows runoff and keeps moisture on site. water. in the open and weed control may be needed during establishment phase. Proc. vetiver, ruzie grass, elephant grass and lemon grass. The increase was 39% It identified the following reasons: Erosion prevention is seen as an end in itself. soil conditions. DNA fingerprints (RAPDs) of the pantropical grass. The implication is that VGT, if based on this clone, would be Highly tolerant to toxic levels Aluminium, Manganese, Arsenic, Cadmium, Chromium, innate strength and vigour enable it to penetrate through difficult soil, hard To reduce cost, they can also be Aust. However due to their small population the damage was Photo 1: Upper: Machine planting; lower: manual planting. strength of soil in adjacent 50 cm wide strip by 90% at 0.25m depth. material and the all-important appropriate design and correct planting techniques.. Dr. Paul Truong, Principal Soil Conservationist, Leader Bio-Engineering to 150m in vertical height in areas where annual rainfall exceeds 3 000mm. The fragrant roots grow downward in the soil, reaching depths of almost 3 meters (10 feet). Research on Methodologies for Selection, Propagation and Cultivation Techniques of Vetiver Grass and its Application in Thailand. Dr. Truong has over 20 years experience in the use of vegetation for and low cost bio-engineering tool for the stabilisation and rehabilitation of disturbed

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