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The use of ginkgo?
Ginkgo wood, not warped, not cracked, not deformed, coupled with beautiful wood grain, easy to process, glue force, strong nail holding power, is a wood carving, high-grade stationery, graphic boards, organ keyboards, high-grade furniture, high-quality wood. In industrial production, ginkgo wood is most suitable for the production of X-ray machine filters, textile printing and dyeing sticks, sanding machine molds, as well as the molds of lacquer, plywood panels, and so on, but also the valuable house of the interior decoration of the luxury building. The people in the ginkgo-producing areas are especially fond of ginkgo wood for their clubs. In Kaifeng Xiangguo Temple, the "Thousand Hands and Thousand Eyes Buddha" is carved from ginkgo wood. The Song Dynasty emperor's chair, the Yuan Dynasty ministers to the court holding the Chao Wat, also made of ginkgo wood, meaning that a thousand years.

In 1958, when the construction of the Great Hall of the People, from the city of Zhuji, Zhejiang Province, has taken a lot of ginkgo wood. Ginkgo wood on the market, its price is 5-10 times higher than the cedar, some manufacturers, sometimes also based on pounds and two to buy ginkgo wood, how precious it can be seen.

The sapwood and heartwood of ginkgo biloba wood is clearly differentiated. Sapwood 3-9 cm wide, cross-section sapwood yellowish or light red, longitudinal section of yellowish white. Heartwood due to the accumulation of calcium oxalate crystals, etc., become yellowish brown or reddish brown. After processing, the surface is glossy. Freshly cut face ginkgo's characteristic odor. This odor is also related to the wood cell contents.

Ginkgo wood specific gravity is light, about 0.45-0.53 grams per cubic centimeter, only about half of the water. Radial dry shrinkage rate of 16.9%, chordal dry shrinkage rate of 23.0%, less than half of the easily cracked oak. Subject to impact, each square centimeter to add force of 0.334 kg or more before breaking. End face per square centimeter to force 431 kg before damage. It took a force of 9.5-12.3 kg per square centimeter to split. All of these traits are significantly better than those of paulownia and fir.

The excellent properties of ginkgo wood are directly related to the anatomical structure of its wood. Ginkgo biloba wood only see tube cells, not see the conduit; tube cell size is not consistent, string diameter 30-40 microns, the largest 60 microns. The arrangement of the tubular cells is not neat, so the drying and shrinking will not produce the up and down through the cracks or some with the direction of the shrinkage inconsistency and the warping cracks. At the same time, in ginkgo wood, there is no resin tract organization, and no axial thin-walled cells, this structure makes its volume change when drying and shrinking is small. Ginkgo wood ray organization is not developed, the number of small and small, per millimeter of wood length only see 2-5 roots, and only one layer of cell composition, ray thin-walled cells and earlywood tubular cell cross-field grain holes and fir similar to the wood, so that it is not easy to form a crack in the wood on the cross-section.

Ginkgo wood contains calcium oxalate crystal clusters in many cells. It can inhibit the activity of certain putrefactive bacteria, so, in itself, with antiseptic effect. Only its ability to resist termite infestation is poor (level 3), the timber outdoor intact value of 82%, indoor intact value of only 45%. This may be related to the fact that ginkgo wood contains a lot of mannan (7.06%) and galactose (1.87%), which termites like to eat.

Some people in our country worship the ginkgo tree as a god tree, they only planted ginkgo, do not cut down the tree, they often marked with the child's birth year, month, day of the wooden card, paper hanging in the trunk, to express the wish that the child can also be like the ginkgo tree as long as the desire to live. However, because of its excellent material properties, incidents of ginkgo theft have occurred from time to time. In reality, people generally only utilize the wood of existing ginkgo trees. Because of the long life of the ginkgo, the volume of the vigorous growth period can be maintained for more than 100 years, the rotation period is very long, so, so far, China's real for the management of ginkgo timber and reforestation precedent is really difficult to find.