The scientific name Dalbergia cochinchinensis Pierre
Common name Siamese Rosewood
Other names Ka Du Sen Yung Red Chinese rosewood.
Rosewood is the name of the native tree species. It has colloquially vary. Local such as freckles, her freckles mosquitoes (Cambodia - Surin) Ka Yung (Thailand) Pradoelai (Chonburi) rosewood silk (Saraburi) Du Sen (Trad) Du Slough (Monday Buri) Fanny's color Maw (China), etc. (full. Smiti Noonan 2523) is the scientific name Dalbergia cochinchinensis Pierre in the subfamily. Papilionaceae family Leguminosea a brand name in the international market, the Siamese Rosewood or Thailand Rosewood originated in
Thailand, Myanmar, Cambodia, Laos and Vietnam rosewood trees are classified as the economic importance of the country. And it is not the economy that are the most expensive. One in the international market as well. However, statistics from the wood Made out of the woods during the years 2528 to 2532 in the year 2530 are made out of rosewood top. But volume is only 662 cubic meters, which is less compared to wood (37,278 m) and wooden doors.(51,937 cubic meters) in the same year (Forestry Department statistics, 2532) may be regarded rosewood in Thailand. Are exposed to conditions that lure brilliant to extinction or extinct.
The genetic diversity Species conservation activities, it is important and urgent for this type of wood.
generalization
Rosewood trees are medium to large trunk has a range of up to 25 meters, 10-15 meters, with smooth gray bark peeling a thin crust of brown and yellow. Usually there is a wide bush. The branches are broken into separate sub-branches of branches. Most eyes will be on the new branch.
Users usually on a small area of the outer branches of a bush. The leaves are composed of a bunch of feather leaf length 10-15 cm, with leaves 7-9 leaves arranged alternately. The leaves are leathery like parchment thin look spacious oval, 3-4 cm long, 4-7 cm tip of the peninsula, supporting small white flowers on inflorescences composites. Along the branches or leaves near the top wishbone. Flowering month May-July The rosewood is a totally separate parallel flat and flimsy width 1.2 cm long, 4-6 cm area directly overlooking the seed coat. Nerves unclear When the pods rosewood will not break out like a red sheath or scabbard Maceaomg pods will fall by the seeds in the seed pod of 1-4 seeds are flat, kidney-shaped, dark brown skin, seeds, rather, it measures approx. 4 mm long. 7 mm. 
The natural distribution
Since wood is wood that is native support in many countries. Climate and rub the two countries and an ecosystem that vary. The natural distribution, so, depending on factors such as the nature and genetic elements that will allow the species. Adaptable to the environment Ecosystems and the species composition of the structure of the ecosystem, which will vary based on terrain and climate. This factor which will determine the evolution together within individual plants vary. The vegetation is different and each locality and appropriate. Will result in variations between genetic origin. Since natural selection Thailand Pa mosquitoes are found naturally.
Hotels in moist mixed deciduous General and dry The east and northeast. In the space of about 100-200 meters above sea level.
Propagation and seedling production.
Although current science of cultured tissue can be applied. Propagated plants of various kinds. Including forest some time. It also limits the level of experimentation is most particularly for the trees. Due to the use of the tool is still under development, modern and high budgets.The process is quite complex Propagated by seeds rosewood is most convenient and affordable way. How to produce and nursery seedlings and rosewood. There is a difference and complexity from. Production of other types of forest tree seedlings because the seeds as a stun rosewood shell some seeds.
If it is to be effective and uniform germination. It should eliminate the issue by stun the shell. Treat seeds before planting One way Perhaps with a dip in cold water for 25 hour or soaked in sulfuric acid concentrations for 1 minute, then wash off the acid with water for 30 minutes (yellow skin and the winner in 2532), and seeds. And planted in the sand box provided. Cover the seeds with sand, a little watered regularly but not wet rosewood seed will germinate within seven days after sowing. Once the seeds have germinated rosewood about 10-14 days, which is not soft, about 1 inch in height and has one cotyledon pair can move in grocery bags or containers are generally prepared using a 4 x 6-inch plastic drill pattern. 8-12 hole for the materials used in the Plant. There may be a tribute mix varies. The results showed that combination. Sediment along the Creek: Sand: RHA: Composting = 5: 2: 2: 1 is optimal (Sukont Sim Siri et al 2531), the time spent in kindergarten brave rosewood in nurseries are different. Based on the maintenance and care generally takes about 3-5 months to get the right size for seedling transplanting. This should have not less than 30 cm in order to have the strength and courage to compete with weeds.
Selection and preparation for planting.
However rosewood can be grown in many areas of the Northeast and the South (as my round in 2528) Selection and preparation for planting rosewood neither was there a difference or complexity of preparing the area for planting trees. no other much Preparation key areas It consists of weeding in plantations. The cultivation area as inhospitable terrain is flat and the collection and destruction of weeds and debris end.
How to grow and cultivate the right.
The extent (beginning at approximately 1 teaspoon) to provide the seedlings with nutrients. Adequate help in the early stages of setting-up and can compete with weeds.
To prepare the hole for planting saplings. Should dig deep enough to cover the root system if it runs out. Fertilizer before transplanting the seedlings and fertilizer at the bottom might not be necessary. If the area is planted with many termite exterminator should remedy the hole with. For proper spacing should be 2 x 2 or 3 x 3 meters, which yielded not much difference in the rate of growth (and the countless teachable 2531).
Rosewood can be planted in combination with other types of wood. The trees to be planted in combination with rosewood. Should the plants are similar. The growth rate And demand in ecological similarities in order to support the joint development of the root system and reduce strife and the canopy over the long term. Plants will be planted with rosewood, red sandal Maceaomg and so on.
Maintenance
Period for the maintenance of plantations, rosewood, it certainly was not determined. It depends on your budget and. Tree growth Planted areas that will be covered. The growth of weeds faster one. However, a preliminary conclusion that there should be enough. Maintaining at least three consecutive years.
Maintenance practices in the same manner as maintenance plants, other weed species should be carried out. At least 2 times a year, especially in the dry season should not be a weed or weeds are in converting scrap. It will become the fuel and cause a fire to get rid of weeds in the early summer.
It is very important and should be taken in conjunction with fire protection. This is important and necessary in the trees are still small. Fire Prevention should start
Since the month of November to May Or when certain No chance to fire again.
Fertilizer in the young trees are very important because they are in a condition to compete. The weed seedlings should be. Fertilizing at least three times per year, which is up to budget prevention. And insect infestations are severe, it is imperative. To the proper use of pesticides. The elimination Destroy wood that has been damaged by disease and insects. To prevent the spread of diseases and pests on. While young trees during the first 3-5 years of planting should not allow pets because pets planted those trees and trampled to eat the leaves and shoots, which will make the tree bad shape and may die.
Nourish the tree cutting and pruning for rosewood may not be necessary after all. Unless it is destroyed by pests and diseases. To prevent a further outbreak. Rosewood planting in narrow spacing, such as 2 x 2 m to the Rii is not the natural branches have grown over time.
For cutting away the specter extend that number to determine exactly when or when not to be, because of the size depending on the spacing. And the fertility of the soil around it. However, noted for the cutting comb is extended. When the canopy began to huddle close together. And cutting comb extension Consider the growth or stunting poorer than the other is.
Diseases, pests and natural enemies
Rosewood are natural enemies of the pests and diseases of many kinds. Insects are the seed drill as Antrocephalus sp. They eat the leaves like Plecoptera Feflexa, Psilogramma menephron they roll the leaves as Apoderus sp., And the drill stem as Sphenoptera sp., Etc. (Chawewan share talents flourish in 2526) for the common enemies of rosewood. while it is not often found in such rust (rust), which is caused by a fungus Maravalia pterocarpi (thir.) Thir. This will destroy all the leaves and stems of plants. The top branch and leaf spot (Tar spot), caused by the fungus by breaking the Ascomycetes (Bahadur Pong new and revolutionary 2531).
Growth and productivity
Despite a rosewood tree is economically important. But since wood is a relatively slow rate of growth has been very little interest in growing.
Plantations create awareness about the growth of young trees to cut my age and productivity in both weight and volume of wood cut in each age group.
However, it also limits the growth of rosewood. During a seedling. Or berry has studied and works as follows. When planted with spacing of 2 x 3 meters.
When the seedlings between one and two years, will have a height of 1.1 meters and 2.1 meters, respectively, and 4-year-old seedlings grown in a 2 x 2 m with a height of 4.4 meters.
(Infinite and teaching faculty in 2531), although there is no data to show the growth rate of trees older than 10 years if the growth rate in the age group 1-4 years, it is considered satisfactory.
Utilization
Benefits of rosewood, usually in the form of exploitation of the wood with beautiful colors and patterns can be considered as the most expensive types of wood.
One of the world Wood rosewood resolution Tough, hard and durable varnish for inspiration. Oil is often used in making Erืi heating appliances are used for carving.
And handle tools
The limitations of this type of wood
Despite rosewood trees are economically important and can be grown in many areas. But because the wood is grown relatively slowly. There is no clear information about the age cut-rate and the yield will be. Rosewood was not interested enough in the Reforestation seriously.
The book documents promoting reforestation Division, Department of Forestry.
By Mr.Chai Siri and the eligible parties.
