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General Information. Aquilaria crassna is an evergreen tree with an open crown; usually growing 15 – 20 metres tall but with exceptional specimens to 30 metres[. Aquilaria crassna (Thymeleaceae) is medium-sized evergreen tree growing to a height of m and a diameter at breast height of cm. A. crassna trees. Our % pure and natural Thailand agarwood essential oil is distilled from wood of aquilaria crassna, synonysm of aquilaria agallocha. Agarwood is also.

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Aquilaria crassna Thymeleaceae is medium-sized evergreen tree growing to a height of m and a diameter at breast height of cm. It is a light-demanding species, which can regenerate under the forest canopy but requires canopy openings for subsequent growth. In its natural habitat, A. This highly valuable product is used in Chinese and Southern Asian medicine as well as for incense and cosmetics in the Middle East.

In Vietnam, where it has been heavily exploited for tramA. These stands are located mainly in the southern coastal forest fringes adjacent to the Cambodian border, and the western part of Da Nang province along the border with Lao PDR.

Of particular importance are the coastal crsasna Sincelocal people in Ha Tinh province in the central part of Vietnam have collected seedlings of A.

Good incomes can be earned from selling whole trees for tram extraction. Ina plantation trial of A.

Initial trial results show good growth of trees, suggesting that A. In order to conserve and use the valuable genetic resources of A.

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The aim of these efforts is to promote the use of this species in non-timber plantations as an ex situ conservation model. This will offer the following advantages:. Reduced exploitation pressure on natural craassna because tram can be harvested from plantations.

Public awareness of the importance of gene conservation can be raised by demonstrations in seed orchards.

Aquilaria Crassna Images, Stock Photos & Vectors | Shutterstock

In tree improvement activities, the yield of tram is used as a criterion of selection. In natural forests, however, it is difficult to use this criterion to select plus trees because the yield of tram from standing trees can only be estimated.

According to local collectors and traders, trees which yield large quantities of tram usually have cracks in their bark of varying forms and depths. This trait has to some extent been confirmed by plantation studies. Such cracks, therefore, could be used as an indirect means of selecting high-yielding plus trees in natural forests.

Using this criterion, 34 plus trees were selected in Huong Khe district of Ha Tinh province in However, improved techniques are needed to determine the tram content of bark samples and to test progenies and clones. It is important to identify the level of inheritability of this trait for vegetative propagation and tree breeding purposes.

At the same time as plus trees were selected, samples of fruits and seeds were collected and studied. The seed of A. One end of the seed is pointed; the other has a black aril cm long with a white stripe. The moisture content of fresh A. The average number of roots in each cutting was Successful propagation by cuttings provides opportunities for large-scale production of planting material of this species.

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The orchard also serves as a plantation model for other valuable tree species in the country.

IUCN Red List of Threatened Species

The orchard is three hectares in size and is situated in Bo Trach district of Quang Binh province. To establish the breeding orchard, seeds from 34 selected plus trees were collected separately and germinated to create 34 half-sib families. Each family crsssna planted in a group of nine trees at a spacing of 2m x 2m with 19 replicates plots.

The groups were randomly arranged in the field, with the exception of neighbouring aquilzria of the same family, which were separated. Planting density was trees per hectare.

The groups will be rogued to leave only one tree, and the final density will be trees per hectare. In order to conserve the genetic resources of this species, and develop its end uses, we recommend that the following activities be carried out:.

Establish trials at larger scales to identify the best provenances and sites for plantations; and. Forestry University of Vietnam. Science and Technics Publishing House, Hanoi.

Nguyen Hong Lam Report on the first result of the research on the Aquilaria crassna.

Forest Science Institute of Vietnam, Hanoi. Scientific and Technique of Ministry of Forestry, No.