The color of huanghuali varies from yellow brown to reddish brown to purple brown. The pattern is beautiful and the material is fine. The price is like gold. The exquisite handicrafts and furniture made with it have become a treasure of practicality, appreciation, preservation and collection, and are very popular among consumers and collectors.
Huanghua pear is a common name for fragrant wood. It belongs to the genus of the genus Diptera and Dalbergia. There are about 120 species of Dalbergia. The genus has three kinds of valuable commercial materials, such as red rosewood, black rosewood and fragrant wood. Among them, fragrant wood is the most precious, and its wood dry density (water content 12%) is greater than 0.8g/ Cm3, the average diameter of the tube hole chord is not more than 120μm, the wood has a special spicy aroma, and is different from other tree species. The fragrant wood species are produced in Hainan, China and northern and southern Vietnam. Produced in Hainan, known as Hainan huanghuali (referred to as Haihuang), produced in Vietnam, known as Vietnamese huanghuali (referred to as the more yellow). Sea yellow is mainly referred to as Dalbergia odorifera, which is endangered and rare.
The huanghua pears circulating in the market are mainly from Vietnam, but they have not been able to identify specific species. The three teachers of Nanjing Forestry University, Xu Yongji, Zhang Yaoli and Yan Shimei passed the Tokyo Yellow from the Wood Specimen Room of Vietnam Forestry University. The study of the tree species of Dalbergia tonkinensis Prain confirms that the Japanese Dalbergia species belong to the fragrant wood, which can be commonly known as the Vietnamese huanghua pear. Because the Tokyo Dalbergia trees are very rare and endangered, they were listed as protected trees of the IA group by the Vietnamese government on March 30, 2006.
Extended reading: identification of Dalbergia chinensis (red rosewood)
Tokyo Dalbergia, also known as Vietnamese Dalbergia. Domestically known as fragrant wood, can be commonly known as Vietnamese huanghuali . Mainly distributed in northern Vietnam, with information showing that there is also a distribution in Hainan, China. It often grows below 500m above sea level. Arbor, 3-15m high. When the baby is young, the trunk is curved, the surface is smooth, and the young skin is grayish white. After ripening, the bark is yellow-brown or gray, with longitudinal lobes.
Heart and sapwood are clearly distinguished, sapwood is light, grayish yellow, heartwood is yellowish red, reddish brown to purple reddish brown, often with brown or dark stripes. The new cut mask has a spicy aroma, and the spicy fragrance reveals the mellow fragrance. For a long time, the smell becomes light and the growth wheel is not obvious. The porous material has a tendency to be semi-dispersed. The tube hole is small, slightly visible under the naked eye, the number is small to slightly less, the distribution is uneven; scattered. The tube hole often contains yellow brown or reddish brown gum. Axial parenchyma is evident under the naked eye, thin banded, winged and poly winged. The wood ray is fine, visible under the magnifying glass, and the chord surface marks are obvious. The structure is fine, the texture is staggered or oblique, and the air-dry density is 0.80-1.03g/cm3.
Extended reading: the difference between Tokyo Dalbergia and Dalbergia
The cross section of the catheter is oval or round, single tube hole, a few diameter tube (2-4, most 2-3); 3-10 tube holes/mm2; small tube hole, maximum string direction Up to 210μm, with an average diameter of 108μm; the tube hole has a gum; the tube molecule has a single tube hole; the tube has a pattern of pores inter-column, which is an appendage type pit. The axial thin-walled tissue is rich, wing-shaped, poly-winged, thin banded and star-polymerized (Fig. 2); the parenchyma cells in the parenchyma cells contain 10 or more rhombohedral crystals. Wood fiber wall thickness; stacked; wall with a single hole or slightly narrow. The wood ray is superimposed, and the single-row ray is very small. The multi-row ray is 2-3 cells wide, 3 columns are more, and the height is usually 7-9 cells; the ray tissue is homomorphic, the iso III type trend, and the erect cells are even visible. The pattern between the ray and the tube is similar to the pattern between the tubes.
For a period of time, how to determine the sea yellow and the yellower, mainly rely on experience, no clear data support. In the future, the Dalbergia sinensis and the Dalbergia sinensis have their own clear structural standards for tree structure. The identification can be clearly distinguished. In theory, the yellow sea is clearer at a glance. There is only one problem that can't be solved at all, and that is the identification report. According to the regulations of the Academy of Forestry, the appraisal report is only issued to the class and is not written to the tree species. That is to say, although the experts have identified the species and know whether it is Dalbergia or Dalbergia, but the identification report for you is just to write "fragrant wood", so you can't determine whether it is sea yellow or more. yellow.
But at the same time there is also a serious problem. According to the current national standard, there is only one tree species of fragrant Dalbergia under the fragrant branch, and the fragrant Dalbergia refers to Hainan huanghuali. In theory, fragrant wood is equal to the fragrant Dalbergia, which is equal to Hainan huanghuali. This problem is big, which means that all the fragrant branches are judged to be Hainan huanghuali. To solve this problem, only the identification report is issued to the tree species. However, the current identification report can only be issued to the class and cannot be planted. Therefore, the "å°´å°¬" can only be sustained. Even if the national standard is revised, the Tokyo Dalbergia is written under the incense stick. However, the result of the identification to the class is still no different from the original.
Vietnamese huanghuali is not actually a kind of Tokyo Dalbergia
While studying the Vietnamese huanghua pear, the experts also discovered that another Dalbergia sp., also known as Vietnamese huanghuali, circulates on the market. It looks like Tokyo Dalbergia, but it is not Tokyo Yellow. Tan, is not the fragrant Dalbergia. It is not yet possible to determine the name of its tree species. It seems that it is really a wave of unrest. Many people say that the "redwood" water is too deep, which is evident.
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