Wood Encyclopedia - Ash
Latin family name: Oleaceae (Chinese name: Oleaceae) English name: ChineseAsh Fraxinus mandshurica (scientific name: Fraxinus mandschurica) is a plant of the genus Oleaceae (also known as the genus Asteraceae). Distributed in North Korea, Japan, Russia, and mainland China, Shaanxi, Gansu, Hubei, Northeast, North China, etc., growing in the area of ​​700 meters to 2,100 meters above sea level, generally growing in hillside sparse forests or gentle valleys in the valley, currently not artificial Introduction and cultivation. And the yellow pineapple and the walnut are also called "the three strong and broad in the Northeast." Fraxinus mandshurica (scientific name: Fraxinus mandschurica) is a plant of the genus Oleaceae (also known as the genus Asteraceae). Distributed in North Korea, Japan, Russia, and mainland China, Shaanxi, Gansu, Hubei, Northeast, North China, etc., growing in the area of ​​700 meters to 2,100 meters above sea level, generally growing in hillside sparse forests or gentle valleys in the valley, currently not artificial Introduction and cultivation. And the yellow pineapple and the walnut are also called "the three strong and broad in the Northeast." Latin family name: Oleaceae (Chinese name: Oleaceae) English name: ChineseAsh feature Large deciduous trees, up to 30 meters, with a breast diameter of more than 1 meter; bark gray, saplings of smooth saplings, longitudinal and thick longitudinal divisions after ageing; branchlets slightly quadrangular, glabrous, with lenticels. Odd-pinnate compound leaves, opposite, 25–30 cm long, with rachis grooved, very narrowly winged; leaf blade 7–11(~13), sessate or subsessate, ovoid oblong or elliptic Shaped lanceolate, long (5~) 8~14 (~16) cm, width 2~5 cm, light end length acuminate, base wedge-shaped, asymmetrical, sharp serrated edges, hairless or sparse bristles on top Below the leaf veins are sparse yellow-brown bristles, and the small leaves and the leaf axis are densely dense yellow-brown fluff. Dioecious, panicles born in the upper part of the last year's leaf axils, inflorescence axis with extremely narrow wings; calyx campanulate, fruit detached, without corolla; male flowers with stamens; female ovary 1 locule, stigma 2-lobed, with 2 The stamens are not developed. The wings are slightly twisted, oblong-lanceolate, 2 to 3.5 cm long, 5 to 7 mm wide, apex obtuse or dimpled. It is a broad-leaved tree with hard material, straight texture and beautiful patterns. The wood section has a large diameter and is suitable for planing and rotary cutting. The diameter of the cut surface is a beautiful parallel strip pattern, and the half-chord-to-print surface is obviously changed with a strip pattern. Generally, it is a high-quality veneer material. The production is made of 0.8~1.0 mm thick slice (sheet) as a veneer material. . Trees are scattered throughout the Changbai Mountain and Xiaoxing'an Mountains. The trunks are usually tall and straight. The trees are 25 to 30 meters high and 40 to 60 cm in diameter. The largest ones are more than 35 meters long and the diameter can exceed 1 meter. characteristic The central area of ​​Fraxinus mandshurica is a humid temperate monsoon climate, and the soil is a meadow grayed brown soil or raw forest soil developed on the alluvial parent material. It grows in the first terrace of the river valley downstream of the floodplain and mountain rivers. The main associated species are Pinus koraiensis Sieb. et Zucc., Picea jezoensis var. microsperma (Lindl.) Cheng et LKFu., Changbai fish scale Picea jezoensis var. komarovii (V.Vassil.) Cheng et LKFu. , Zilia Tilia amurensis Rupr., Astragalus Phellodendron amurense Rupr. It is a positive tree species that is slightly resistant to shade at young age and needs sufficient light after ageing. Like moist, but not resistant to water stains, in areas with poor seasonal drainage, poor growth or even death, poor growth under drought conditions, most like the gentle lower slopes of the lower abdomen and the gentle valleys and river banks; slightly salt-tolerant, At a pH of 8.4, a saline-alkali soil with a salt content of 0.1% can also grow; it is cold-tolerant and develops normally under the severe cold conditions of Daxinganling at -40 °C, but artificial seedlings are susceptible to frost damage. The main root is short, the lateral roots are developed, the cutting roots have strong sprouting, and the sprouts grow rapidly. In early spring, the first leaves are flowering, and the flowering period is from April to May. In the natural state, it began to solidify in 15 to 20 years, and the samara began to mature in August. The ash is mainly produced in the northeast and north China. Yellowish white (sapwood) or brownish yellow (heartwood). The annual rings are obvious but uneven, the wood structure is thick, the texture is straight, the pattern is beautiful, shiny, and the hardness is large. The ash has the characteristics of elasticity, toughness, wear resistance and moisture resistance. However, it is difficult to dry and warp easily. Good processing performance, but should prevent tearing. Smooth cut surface, paint, good adhesion performance. Processing performance: The processing performance of ash is good. It can be fixed with nails, screws and glue. It can be dyed and polished to obtain a good surface. Suitable for dry weather, with minimal aging and small changes in performance. Physical properties: Compared to its weight, ash has excellent overall strength properties, good shock resistance and steam bending strength. Durability: There is no heartwood anti-corrosion in ash, white wood is susceptible to powder beetles and common furniture beetles foraging. Xinmu has moderate anti-seepage effect on anti-corrosion treatment agent, and white wood has penetration. Practicality: good flooring and furniture materials. It can be used as a precious wood species such as white yuan, oak, walnut, etc., and its use value is extremely high. Crystal Diamond Surface/Laminate Flooring Laminate Floor,Laminate Flooring,Laminated Flooring Hongda Anxin Decorative Material Co., Ltd. , http://www.hb-flooring.com