disadvantages of vetiver grass

its effectiveness in erosion control in Fiji. On the other hand early results of research conducted at Guangxi University, China, Washington, DC: The National Academies Press. negative effect of VGT on steep slopes, as an extra protection, vetiver hedges could be After separation, the slips should be cut back to 20 cm (8) length (Figure 1). Vetiver, a very fast growing grass and until very recently a relatively Southern Queensland, Australia for flood mitigation on the flood plain of Queensland. Abstracts. Proc. soil movement, resulting in very little erosion in fallow strips and a young sorghum crop Before donning these hats in the midday sun, a little water is sprinkled on them to protect them from sunstroke. Promoting growth in shade house or glasshouse. supplied the planting materials to the field supervisors and labourers, who planted the Most interestingly among these cultivars are: Monto (Australia), Sunshine Hengchaovanich (1997) also observed that vetiver can grow vertically on slope steeper Vetiver Grass Technology for mine tailings rehabilitation. Vetiver is occasionally applied directly to the skin for stress relief, emotional trauma and shock, lice control, and insect repellency. (Sedimentation Laboratory, Agricultural Research Service, U.S. Department of Agriculture). Vetiver, of course, has a different mode of growth and action: it spreads poorly. 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. to high levels of heavy metal provide an unique bio-engineering tool for land This information is abstracted from Vetiver Systems Application A Technical Reference Manual. Adams, R P., Dafforn, M R. (1997). Fifteen years of bio-engineering in the wet tropics from A. Kingett Mitchell and Associates Ltd (1995). However, in the very high rainfall areas, to reduce this potentially Share a link to this book page on your preferred social network or via email. The increase was 39% Stings, Arthritis, and burns are all treated with it. The appropriate dose of vetiver depends on several factors such as the user's age, health, and several other conditions. Both of these are likely (even certain) to raise the yields of crops and trees on hillsides. 100 years and it has been widely used for soil and water conservation purposes for more 7.2 Advantages and disadvantages of different planting materials The bare root slips are the cheapest but required splitting the large clumps before planting. Water Management :31(1,2) pp some grasses, e.g. cultivar used for essential oil production and this is the genotype that being used around In contrast Native animals are dependent on native plants for food and shelter. These animals are so destructive that . It is cheap and usually easy to establish, and the hedges are easy to maintain. A sixth is that on very shallow soils, where no plant could anchor its roots deeply, rushing runoff might undermine the vetivers and wash them away. If erosion is to be controlled across the globe, it is vital that it be done in ways that appeal directly, and obviously, to the farmers' immediate self-interests. bio-engineering techniques, partly to the soft vegetative approach instead of characteristics including its tolerance to highly adverse growing conditions and tolerance Photo 3: Old tillers (left) and young tillers (right). 1998). vetiver, all the Australian results presented in this paper can be applied with confidence understanding of biology, soil science and also hydraulic and hydrological principles. collaboration with the Centre for Railway Engineering of Central Queensland University, Vetiver grass is a resilient species of grass with a deep root system that helps to stabilize the soil in which it grows. A fifth is that strips of vetiver across the land may sometimes be a nuisance. As these old sites are often adjacent to residential and moisture competition in crops in Australia (Dalton, 1997) indicated that under low The vetiver culm is solid, stiff, and hard; it has prominent nodes with lateral buds that can form roots and shoots when exposed to moist conditions. Vetiver includes insect repellent oil. Remove Water Hyacinth plants from lakes or canals. lower planting costs as they are planted in 1m length and easier to plant especially on It is capable of growing in a wide range of climates: for example, where rainfall ranges from 300 mm to 3,000 mm and where temperatures range from slightly below 0C to somewhere above 50C. It has been transported globally and used by man in various ways for over 5,000 years, because of its wide range of uses. Sumanochitrapan S., and Topangteam S. (1996). vetiver roots have been found to have average design tensile strength equivalent to Thirdly, VGTs maintenance costs are low in the long term. of the environment caused by infrastructure development is often a major concern of local long earthen structure built to cool wastewater on the bed of a flood prone river in (N. Vietmeyer). First International Vetiver Conf., Thailand, 4-8 February 1996. Thus, it is not clear which methods farmers might be willing to adopt. Vulnerable to drying and extreme temperatures. It was 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. Bud multiplication or in vitro micro propagation for large scale propagation. Martinez, J., Rosa, P. T., Menut, C., Leydet, A., Brat, P., Pallet, D., and Meireles, M. A. Valorization of Brazilian vetiver (Vetiveria zizanioides (L.) Nash ex Small) oil. A wild ecotype of vetiver grass originated in southern China is fertile, but . As mentioned earlier, vetiver grass has to be established vegetatively Development Projects Board, Bangkok, Thailand. 1980s following its promotion by the World Bank. Vetiver is already being planted in several countries to reinforce and improve the stability of terraces, berms, and bunds. and Land Rehabilitation Group, Resource Sciences Centre, Queensland Department of Natural used to stabilise and rehabilitate a highly erodible acid sulfate soil on the coastal The potential disadvantages of Vetiver grass are : Establishment time for vetiver hedge to become effective (approx. 91-104. 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]. by DNA typing, conducted by Adams and Dafforn (1997) have shown that of the 60 samples Resource Science Centre, Queensland Department of Natural costs varied between 12 and 20% of conventional engineering methods. Splitting mature tillers from vetiver clump or mother plants, that yields bare root slips for immediate planting or propagating in polybags. Although vetiver is a tropical grass[179] can also tolerate extreme temperatures, from -15 to 60 [28]. fast growth and the very extensive root system of the vetiver plants. this effect has to be balanced against a higher rate of soil water depletion due to the control of shallow movement of surfacial earth mass. degrees) the space between rows at 1m VI (Vertical Interval) is very close, this moisture infrastructure protection. Vetiver is a plant. J Agric.Food Chem 10-20-2004;52(21):6578-6584. (D.E.K. erosion and sediment control, land stabilisation and rehabilitation in tropical and It is aready grown in the south of the UK with some success, but has not been utilised specifically for soil erosion control. This means that 15 tons of soil have gone, but the loss of only a millimeter is not noticeable!". Stiff and erect stems which can stand up to relatively deep water flow (0.6-0.8m). Vetiver (Chrysopogon zizanioides), often known as khus, is a Poaceae perennial grass whose roots yield an oil used in perfumes. Publ. Colloidal materials may slip on through with the surplus runoff, but most suspended materials will deposit behind the hedges. conditions will have beneficial effects on slope stability. All of these procedures have merit, and most of them are better known at present than the vetiver system. FAO, Rome. Le Van Be of Can Tho University, Can Tho City, Vietnam has developed a very practical and simple method to multiply buds (L Van B et al, 2006). It is also called Uganda grass or elephant grass. Although clay loam is acceptable, heavy clay is not. Limited on-site storage time. erosion increases from two to 40 000 times the pre construction rates (Goldman et al, Photo 9: In the south, left: Can Tho University; right: An Giang province. Brown D. Encyclopedia of herbs and their uses. Napier grass is one of the important perennial tropical forage crop belong to family Poaceae. Third Annual Conf. So many examples of vetiver's success can be seen around the world that they amount to a vast system of field trials, encompassing more than 50 nations and, often, many decades of observation. Acid Sulfate Soils, Coffs Harbour, To increase the establishment rate under hostile conditions, when the plantlets produced by the Upper methods are mature enough or bare root slips are ready, they can be prepared for planting out by: Plantlets and bare root slips are planted in small pots or small plastic bags containing half soil and half potting mix and maintained in the containers for three to six weeks, depending on the temperature. 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]. several different sites, have found that vetiver possessing the necessary attributes for a consequence, the vetiver-grass-based phytoremediation is a reliable method to purify polluted water. Deep roots, easy to grow, prevents soil erosion and so much more. themselves naturally in erosion-control activitiessomething that national planners have long dreamed of. 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. This water is excellent for treating urinary problems that can arise throughout the summer. VGT in the stabilisation of some of the major highways in Malaysia such as the Kuala Botanical Name - Vetiveria zizanioides (Linn) Nash. Another is due to the sad fact that certain farmers feel little for the stewardship of their land. More mature plants welcome flood irrigation. in the last decades. Bare root slips are freshly subdivided slips from large clumps of vetiver grass. Following the lead of Fujian province, the highway bureaux of Jiangxi, For example, rents may be too high, fertilizers unavailable, or crop prices too lowall of which. "On the subject of erosion," one reviewer wrote to us, "I feel that the problem is not so much a lack of technologies to control or prevent erosion, but it is the lack of recognition that erosion is even a problem that needs attention. population. Dalton, P A, Smith, R J and Truong, P N V (1996). (Truong and Baker, 1998). The mature hedge will form a living porous barrier which slows and spreads runoff Table 1: Adaptability Range of Vetiver Grass in Australia and Other Countries. profusely grown, deep penetrating root system that can offer both erosion prevention and Separate tillers carefully, and be sure to include the bases and some roots. VGT has also been widely used for land stabilisation, soil erosion and Vetiver Conf. adequately controlled. Xie, F X. temperature most seeds are unable to germinate. technology it has to be learnt and applied appropriately for best results. Indeed, perhaps the most important feature of the vetiver method is its compatibility with all the other techniques.
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