Chinese elm


There are more than 60 species of genus Moss in China, covering all parts of the country, from Daxing'anling in the north to Hainan Island in the south. It is an important forest species, among which the eucalyptus and moth are often simple forests. Maize forest is one of the main hardwood forests in China. Its forest area accounts for about 12% of the total forest area of ​​the country, and its accumulation accounts for about 10% of the total volume of wood. Domestically, there are mainly beech trees in the northeast, paralysis of the Yellow River and the south of the Yangtze River basin, cork oak, and alfalfa. There are only white genus in China, and the genus White genus is divided into 6 groups. The most common ones are the palsy group and the scorpion group. According to the national standard GB/T 16734-1997 "China's main wood name", the eucalyptus is divided into two groups, namely the paralyzed group and the scorpion group, mainly including the following species: Paralyzed group: Q. aliena, cork Q. variabilis, Q. chenii, etc.槲栎 group: Q. variabilis, Q. mongolica, Q.glandulifera, Q. fabri, Q. liaotungensis, eucalyptus (Q. dentata) )Wait. The two groups of wood can be distinguished from the organizational structure. Among them, the wood of the paralyzed group is a ring hole material, the hole of the late material tube is less, the single tube hole, the oval shape, the diameter column; the wood of the sputum group is also a ring hole material, but the tube hole of the late material is more, the single tube hole and The diameter of the compound tube is polygonal, and it is buried in a light-colored structure and has a flaming path.

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