The climate in the Russian state of Irkutsk is continental. About 76% of the area is covered by forests, with timber reserves of 9.2 billion cubic meters, accounting for more than 10% of Russian timber reserves. Irkutsk region is Russia's large timber base - second only after the Krasnoyarsk Territory in the Russian Federation. The quality index, the reserve concentration of the improved tree and the degree of development and utilization are all excellent.
Wood species: larch birch eucalyptus spruce ash white birch cedar eucalyptus
Larch: (scientific name: larch; alias: Xing'an larch, Italian pine, Daguo Xing'an larch, Dahurian larch)
Wood material: shiny, rosin smell. The texture is straight and uneven, and the structure is slightly thicker. Weight; soft to medium hardness, dry shrinkage, strength. Impact toughness. The cut surface is smooth; the dyeing and painting performance is better after the paint; the nail will be split and the nail holding power is strong. Corrosion resistant. It dries quickly, but it is easy to crack and twist, and it is easy to split outside the knot. It is about 30M high and has a breast diameter of about 0.5M. It has strong corrosion resistance and is one of the most resistant trees in coniferous trees. It has weak anti-ant properties and can resist the harm of marine drilling and wood, and it is difficult to handle anti-corrosion and infusion.
More oily, distributed in Russia, Siberia, the Far East and Northeast China. Mainly imported from Russia, the amount is large. Wood use: Because of its strength and corrosion resistance, it is large in coniferous trees. Logs and original strips are more suitable for pillars, utility poles, buildings, bridges, sleepers, piles, vehicles, ships, pits than redwoods. Wait for other occasions that require durability and strength. Sheets are used for racks, saw blades, wooden troughs, wooden ladders, ships, springboards, truck beams, and packing boxes. Identification points: The inner layer is bright purple after the skin is peeled off. The log section is thorny. The difference between heart and sapwood is very obvious. From early to late, the material is deep and hard. The gum road is small and small.
Birch: (scientific name: birch, alias: southwest birch, white red, red yellow)
Birch family; dicotyledonous plant, belonging to the Fagales. 6 genera, 140 species, mainly producing north temperate zone. There are 6 genera of China, more than 70 species, distributed in the north, central to southwest.
Ostryopsis is a Chinese specialty. Deciduous trees or shrubs. Root with ectomycorrhizal fungi. Young shoots and young leaves often have resin glands or glandular spots. Single leaf, alternate, with heavy serrations. Betula is fast-growing, most of the species are cold-tolerant, resistant to drought and thin soil, and are often the pioneer species of natural regeneration in the northern temperate zone. The texture is dense, straight, tough, elastic, easy to cut, strong in plasticity, smooth in planed surface, strong in material after drying, and strong in nail holding power. Birch and color wood are fine in structure, strong in strength, good in color and easy to process. However, they are easy to crack, warp and deform when dry. They should be specially used when used. They are suitable for furniture feet and door frames. Commonly, there are B. platyphylla, B. albo-sinensis, B. luminifera and the like.
椴木: (scientific name: 椴木; alias: Bodhi, American white wood)
The woody wood is soft, processing, tinting strength, paint performance is good, can also be dyed, bleached, dyed red can replace red fragrant wood, used for surface inlay, small shrinkage, not easy to deform. The white wood portion of the eucalyptus is usually quite large, milky white, and gradually merges into a light red to brownish heartwood, sometimes with deeper stripes. This wood has a fine uniform texture and a fuzzy straight line. The eucalyptus is light in weight, soft in texture and low in strength, and belongs to a class of wood which is resistant to steam bending. Without heartwood resistance, white wood is susceptible to common furniture beetles foraging. Penetrant antiseptic treatment.
Spruce: Spruce is an evergreen tree with white or grayish white bark that is split into irregularly thick oblong pieces; 1 or 2 years old branches are orange-red or yellowish-brown, with short or few hairless, micro There are white powder, the old branches are light gray; the winter buds are conical, brown, slightly resinous, the bud scales persist, and the apex recurs. The shape of the leaf is curved, and it is somewhat curved. It is 1 to 2 cm long and 1.5 to 2 mm wide. The tip is sharp and the cross section is square.
Fraxinus mandshurica: (scientific name: ash, alias: Quliu, leeches) distributed in northeast China and North China. North Korea, Japan and the Russian Far East are also distributed.
Ash: The material of the willow is slightly heavy and hard, the texture is straight, the pattern is beautiful, the corrosion resistance and water resistance are good, the processing is easy, the toughness is large, the coloring and coating performance are good, and the decorative performance is good. The material has better performance, the color is yellowish white to taupe, the wood structure is from medium to thick, the texture is straight, the string surface has a beautiful landscape pattern, the gloss is strong, and the waxy texture is slightly. The wood grain is obvious, the sapwood is yellowish white, the heartwood is brownish yellow, and the wood color is slightly cash yellow after sawing and processing. The material is hard, the texture is smooth, the pattern is beautiful, the processing performance and paint performance are good, water resistance and wear resistance, and deformation is small. The ash is the ideal surface material, and it should be made of high-grade furniture with imitation teak color. Today's home decoration, because of the lower price of ash, the color is more uniform, more used, but the ash pattern is large, the wood is not delicate, and the color is yellowish. The current replacement of ash with white peony and red carp The more you come.
White birch: (scientific name: white birch; alias: birch, pink birch, Xing'an white birch, birch tree, white birch)
White birch: the wood is shiny; there is no special smell and taste; the texture is straight, the structure is very fine and uniform. Moderate weight, soft or medium hardness, dry shrinkage, low to medium or medium strength, medium or high impact toughness. The material is slightly heavy and hard, the structure is meticulous, the processing performance is good, it is easy to saw, plan, car, spin, and the cutting surface is smooth. Strong nail holding power, but easy to nail and split, it is best to punch holes before nailing. Good paint and glue performance. The wood should be dry slowly to prevent cracking and deformation. Wood has poor corrosion resistance, especially for unpeeled wet materials; it is not easy to decay after drying, and it is easy to prevent corrosion. The birch is widely distributed, and the wood can be used for vehicle materials, parquet flooring, curved wood and furniture materials, plywood, doors, windows, buildings, etc.
Cedar: Arbor, up to 70 meters; bark is light gray, solid wood, dense texture, used for construction, bridges, sleepers, shipbuilding, etc.; seeds contain about 25% oil for industrial oil.
It is sensitive to hydrogen fluoride and sulfur dioxide in the atmosphere and can be used as an atmospheric monitoring plant. Seeds are bred, but in our province, artificially assisted pollination is required to obtain seeds; seedling shoots can also be propagated.
Elm: The wood is light yellow, the texture is straight, the string surface has a silver pattern, the wood is fine and hard, and the shrinkage is small, which is more suitable for the working class. The wood is hard, has a large specific gravity, high strength, dense structure, strong resistance to moisture and corrosion, abrasion resistance, good coloring performance, difficult processing, but smooth processing surface, which is a high-quality material for making furniture.
Elm and white oak are the same family of wood, so in the export of Chinese wood products, beech products account for a considerable proportion. The coffin produced in China is mainly produced in the northeast forest area. However, after the implementation of the “natural forest protection project†in 1998, the harvesting volume was limited, so the market demand was mainly imported from Russia. In recent years, China's imports of timber from Russia have grown rapidly, accounting for the first place in China's imported timber source countries, but the tree species are mainly Korean pine, white pine and larch, and there are few hardwoods. Recently, due to the large increase in demand for eucalyptus in the market, the amount of eucalyptus imported from Russia has been rising.
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