Photo: Burmese teak logs
Teak, also known as annatto, purple teak, blood tree, fatty tree, purple oil wood (Yunnan), buried mulberry (Yong translation), hardwood tree (anonymous translation), stone salt, ring hole tree, is a kind of deciduous or half-deciduous Large trees, trees up to 40-50 meters, 22.5 meters in diameter, straight and straight. Teak is native to Myanmar, Thailand, India, Indonesia, Laos, etc. It is the main afforestation tree species in Southeast Asia and one of the world's most valuable materials. Known as the "King of Wanmu", it is called "National Treasure" in Myanmar and Indonesia.
Morphological characteristics
Teak is a tropical tall and broad-leaved tree with a height of 39-45 meters and a breast diameter of about 1.5 meters. Bark brown or gray, branches quadrangular, stellate. Leaves opposite, maximal, ovate or elliptic, densely pubescently pubescent. The panicles are broad, flowering in autumn, white in flowers and aromatic. World treasure grapefruit seedling
Expensive wood species; chopped teak leaves by hand, with blood red stains to color the fingers, and difficult to wash at a time, so call it a rouge tree or blood tree. Suitable growth temperature: absolute maximum temperature of 43-48 ° C and absolute minimum temperature of 2 ° C.
Vertical distribution is more common in low hills and plains with altitudes below 700-800 meters. The teak is a hi-light tree species. The annual average temperature of the origin is 20 °C-27 °C, the absolute temperature is 2 °C, the annual rainfall is 1100-3800 mm, and the dry and wet season is obvious. Strongly positive tree species can grow on sand shale, red soil and red soil developed by granite, and enjoy deep, moist, fertile and well-drained soil. It can be planted in places where there is no low temperature frost (-1 °C - 2 °C), shallow roots, large crowns, wind damage, and shelter from the wind. Teak grows fast, has strong sprouting ability, and can be germinated and renewed after cutting. The tree height is up to 50 meters and the breast diameter is 2.5 meters. The trunk is straight. Branchlets quadrangular. Single leaf, alternating opposite, large blade, obovate, broadly elliptic or round. Flowers arranged in large panicles terminal or axillary, calyx campanulate, 5--6 shortly lobed, sessate, ovate or pot-shaped; fruit globose, densely rust-colored, sate in persistent membranous calyx.
Teak wood properties: teak luster, best made in Myanmar, teak oily, uniform color, texture straight. From the texture point of view, teak has obvious ink lines (or blood bands) and oil spots. The ink lines are distributed in a straight line. The finer the more, the higher the oil quality, the better the quality. The older the tree, the higher the density, the higher the annual ring Irregular distortion, after the crosscut, the beautiful pattern of the awe-inspiring work, meticulous and beautiful, is called a grimace by the expert. The coarse fiber in teak structure has medium weight and very small dry shrinkage coefficient. The shrinkage rate is 2.2% from raw material to air dry and 4.0% in chord direction. It is the smallest deformation coefficient in wood and has good bending resistance. Wear-resistant, air dry density of 0.65g / cm3 (dry weight of about 650 kg / m3). It is not resistant to water and fire resistance in the case of large changes in sun, rain and wet and wet; it is resistant to termites and sea worms in different sea areas, and is extremely resistant to corrosion. Good drying performance, good adhesion, paint and waxing. Because silicon is easy to blunt, it is difficult to cut during processing. With good grip strength and good overall performance, it is recognized as a valuable tree species in the world.
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