The results are excellent at some sites and bad failures occurred at Vetiver Grass - The Hedge Against Erosion-A technology for soil and water conservation and embankment stabilization -- VIDEO This video was first prepared in 1995 and is a voice over slide production describing how vetiver grass technology works. Photo 9: In the south, left: Can Tho University; right: An Giang province. used to stabilise and rehabilitate a highly erodible acid sulfate soil on the coastal Finally, it should be noted that although some hedges have formed within a few months of planting, in many sites the erosion-blocking, contiguous barrier will take 3 years or more to form. As mentioned earlier, vetiver grass has to be established vegetatively Piers Blaikie,* for instance, claims that governments can create the right policy environment for attacking the causes of soil erosion by stimulating such actions as: Research (notably on specific techniques); Legislation (for example, banning very damaging practices); Supporting extension and facilitating credit (and tying both to the positive encouragement of soil-conserving crops); Rural development (for instance, strengthening local institutions); Improving administrative structures (so that bureaucratic decisions are based less on fiat and more on experience); Land tenure reform (so that farmers have a vested interest in erosion control); Adjusting prices for farm products and inputs (especially eliminating those that subsidize unsound practices); and. Fort Polk, Louisiana. To the causal observer, it may seem implausible that a hedge of grass only one plant wide could block the movement of soil under torrential tropical rainfall. Information from this source is evidence-based and objective, and without commercial influence. Third Annual Conf. Truong, P, Gordon, I and Baker, D (1996). Vetiveria can also be found as scented fibrous roots in Indian marketplaces. Low cost micro-propagation of vetiver grass Proc. It does not require careful layouts or high-quality control. The real causes of land misusesuch as the land tenure systemare never analyzed. Efficient, economic, and a quick way to prepare the planting material. conditions will have beneficial effects on slope stability. Chrysopogon zizanioides, commonly known as vetiver and khus, is a perennial bunchgrass of the family Poaceae.. Vetiver is most closely related to Sorghum but shares many morphological characteristics with other fragrant grasses, such as lemongrass (Cymbopogon citratus), citronella (Cymbopogon nardus, C. winterianus), and palmarosa (Cymbopogon martinii). 2 Case Studies | Vetiver Grass: A Thin Green Line Against Erosion |The Ushira - Vetiver is a coolant, but yet aids in digestion. Regional Waterboard Techn. lands caused by civil construction. Asia-Pacific and Southern African regions. Availability of farm machinery: Basic farm machinery is needed to prepare nursery beds, control weeds, cut grass, and harvest vetiver. (D.E.K. This dark green syrup with a woody flavor relieves stomach burning caused by Pitta in the summer. If youre breastfeeding, its also better to avoid vetiver. Flood erosion control on the floodplain. 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. of erosion control and land stabilisation which softens the harsh look often tests showed that vetiver hedges were successful in reducing flood velocity and limiting estimated that saving of A$100 000 would be made when VGT was incorporated in the design The establishment time depends on the site, on the climate, and on the numbers and sizes of the plants employed. Copyright 2023 National Academy of Sciences. It has the potential to result in a miscarriage. Apparently, the vetiver system also provides even more benefits, the most important being the fact that the stout lines of vertical thatch hold back moisture long enough to give it a chance to soak in. Use only the top part of the mature crown. Farmers are only moderately concerned about soil loss and will list numerous higher priorities for improving their farms. and extreme temperature from -14. bio-engineering purposes. tool for erosion control and slope stabilisation have been implemented for centuries but in the last decades. Physiologia Plantarum 15: 473-497. First International Vetiver Conf., Thailand, 4-8 . primary roads (21 500km) and gabion stabilisation. It is minimally dependent on public agencies or neighborly cooperation. common size for vetiver roots. Vetiver grass is a great source of nutrition for farm animals. From geotechnical perspective, these Select old culms, that have more mature buds and more nodes than young ones. Acid Sulfate Soils, Coffs Harbour, Irrigation method: Overhead irrigation will evenly distribute water in the first few months after planting. its popularity has increased in the last decades. Arsenic, Cadmium, Chromium, Nickel, Copper, Lead and Mercury which are highly toxic to suitably designed. Publ. The plant can withstand a lot of water. View our suggested citation for this chapter. Agri Res Svc: Dr. Duke's phytochemical and ethnobotanical databases. and information on vegetation are now available for application in engineering designs. 0.6m, forming a living barrier which slows and spreads runoff water. on Soil To every thoughtful observer, it is obvious that government policies, farming practices, excessive pressures on the land and its vegetationnot to mention foolishness, ignorance, and even a malevolent self-interest that sometimes verges on "eco-vandalism"all lead to soil erosion. 74. Vetiver has also been used to rehabilitate salt affected lands due to both There isnt enough credible information to tell if vetiver is safe or what the potential side effects are if its used on the skin. Stiff and erect stems which can stand up to relatively deep water flow (0.6-0.8m). Vetiver grass is a tall tufted bunchgrass that can grow to be 1.5 meters (5 feet) tall. Click here to buy this book in print or download it as a free PDF, if available. lands. In a soil block shear test, Hengchaovanich and Nilaweera (1996) also found that root Research conducted by Hengchaovanich and Nilaweera (1996) in Malaysia showed that the In: Abstracts of papers presented at Proc. Second National Conf. Plants are hardy and unaffected by exposure to high temperature and low moisture. On the other hand early results of research conducted at Guangxi University, China, subtropical Australia. Put plants into 20 litre plastic bag, and tie it closed. We currently have no information for VETIVER overview. 3 Conclusions | Vetiver Grass: A Thin Green Line Against Erosion |The In Australia it has been 1995) and highly acidic (pH 3.5) tailings of a gold mine. with more shade tolerant species. Vetiver is able to This information is abstracted from Vetiver Systems Application A Technical Reference Manual. VGT in the stabilisation of some of the major highways in Malaysia such as the Kuala of vetiver hedges under deep flow were determined by flume tests at the University of Resources, Brisbane, Australia. Although it eventually needs little or no care, sometimes the plant has to be helped to form a hedge at the beginning. innate strength and vigour enable it to penetrate through difficult soil, hard world for over a century. been used for essential oil production for centuries and for other purposes around the the vetiver hedges will protect the banks of river and stream under flood conditions. Subscribe to our NEWSLETTER for daily update on Medicinal plants and their health benefits. 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). Vetiver System Technology, which is based on Vetiver grass (Chrysopogon zizanioides L. Roberty) has been successfully used as a phytoremediation tool to remediate both polluted water (municipal . 91-104. There are two Vetiver species being used for soil conservation Stings, Arthritis, and burns are all treated with it. In large projects, these plantlets can be Although the protocols of individual laboratories differ, tissue culture involves a very small bit of tissue, growing it in a special medium under aseptic conditions, and planting the resulting small plantlets in appropriate media until they fully developed into small plants. Cut culms in 30-50mm (1-2) lengths, including 10-20mm (4-8) lower the nodes, and strip off the old leaf covers. The implications are that, once the Research on Methodologies for Selection, Propagation and Cultivation Techniques of Vetiver Grass and its Application in Thailand. Vetiver grass is a perennial grass with a height and depth of 2 m and 3 m, respectively, which can be effectively applied to absorb soluble nutrients consisting of nitrogen, phosphorus, as well as heavy metals, such as zinc, copper, nickel, chromium, and lead [22,23]. Mature vetiver, however, thrives under waterlogged conditions. Certainly there is some truth in these assertions, but the mind-sets of today need not be those of tomorrow. Vetiver grass is a resilient species of grass with a deep root system that helps to stabilize the soil in which it grows. This cultivar for soil and water conservation purposes: The south Indian genotype is the main It is not difficult to remove if no longer wanted. surface erosion and deep rooted plants such as trees and shrubs can provide the structural It identified the following reasons: Erosion prevention is seen as an end in itself. the world for soil and water conservation purposes because of its unique and desirable 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. drainage lines resulting from massive earth shaping in industrial parks, has gained wide This is the final outcome of several steep slope recreational areas, the movement of these contaminated materials from the sites must be 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. Namwongprom K., and Nanakorn M. (1992). Currently VGT is being used in several road construction projects by Although clay loam is acceptable, heavy clay is not. at 0.50m depth and gradually reduced to 12.5% at 1m depth. Tolerance to extreme climatic variation such as prolonged drought, flood, submergence 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. In a related vein, a few years back, an FAO publication** highlighted what its authors considered the reasons why large-scale centralized soil-conservation schemes failed. Office of the Royal later. other bio-engineering technologies, VGT provides a natural and environment friendly method Dr. Truong has over 20 years experience in the use of vegetation for Vetiver grass hedges for erosion Poor land management can result from ignorance ormore oftenfrom economic, social, or political pressures. velocity and its erosive power. was registered in Queensland, Australia as Monto vetiver. Bands of vetiver across these slopes would work only if the farm is cultivated by hand. occurs regularly, have been effectively protected by VGT. The plant is used in dryland restoration to reduce soil erosiveness and is sometimes planted as a hedge. Faster establishment and growth after planting. Washington, DC: The National Academies Press. Do you want to take a quick tour of the OpenBook's features? Seedling Production from Seeds of a Wild Ecotype of Vetiver Grass Although vetiver is a tropical grass[179] can also tolerate extreme temperatures, from -15 to 60 [28]. A fifth is that strips of vetiver across the land may sometimes be a nuisance. highway network is expanding rapidly, for example during the 1992-1996, more than. 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. re-established themselves after a few years, providing a long term and natural solution to bio-engineering tool outweigh its disadvantages particularly when the vetiver plant is Evaluation of the root system of Vetiver grass ( Chrysopogon Use of vetiver grass for engineering purposes in Malaysia Asia, Oceania and Africa. Secondly, as with Successful examples of application of VGT for slope stability Southern and west Africa, its application is mainly restricted to the sub continent, and . vetiver, ruzie grass, elephant grass and lemon grass. Vetiver Conf., Thailand . effectively protected. characteristics in situations where a pioneer plant is needed to provide the initial unique grass in erosion and sediment control in agricultural lands, land stabilisation in In India, mats fashioned from vetiver roots and bound with ropes or cords are used to cool rooms in a house during the summer. technique and recently a bio-engineering tool, the application of VGT requires the vetiver roots have been found to have average design tensile strength equivalent to Vetiver is occasionally applied directly to the skin for stress relief, emotional trauma and shock, lice control, and insect repellency. In: Proc. (Dalton et al, 1996) (Fig.1). In the last 10 years he has concentrated on the application of the soil movement, resulting in very little erosion in fallow strips and the crop was Application of the Vetiver grass Water Bio-engineering, Manila April 1999), KEY WORD: Vetiver grass, erosion and sediment control, runoff, land It could be a boon to dozens of nations whose waterways are now filling with silt or suffering from seasonal cycles of flood and drought. by DNA typing, conducted by Adams and Dafforn (1997) have shown that of the 60 samples The accumulated experiences, as described in previous chapters, add up to a compelling case that vetiver is one practical, and probably powerful, solution to soil erosion for many locations throughout the warmer parts of the world.
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