The birch
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Last Update: 2020-11-18
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Source: Internet
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Author: User
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in the dense forests of Shishan in guangxi, southeastern Yunnan and northern Vietnam, there is a very hard wood tree called birch. The material of the birch wood is dense, into the water is sinking, hard as steel, knocking can make a metal-like sound, cutting, processing are very difficult, even nails can not be nailed in, can be said to be "knife and gun do not enter" steel wood.
so hard, in addition to its own very slow growth, dense texture, but also because it was born in limestone mountains. In order to absorb nutrients, its roots are deeply embedded in the rock seams, absorbing many calcium minerals, which gather in the wood, and thus become particularly hard. The wood color of birch wood is ruddy, does not bend, does not crack, is resistant to water and corrosion, is a high-quality wood. The texture of the birch also has a unique feature, in the cross-section of the tree, the wheel is wide and narrow on one side, the shape is similar to the texture on the shell, so it is called "the birch".
belong to the birch tree branch, is evergreen trees, generally can grow to more than ten meters high. Guangxi Longzhou County, a large birch, about 40 meters high, the trunk diameter of about 1 meter, age between 450-500 years old, this is probably the largest birch.
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