Ginkgo first appeared hundreds of millions of years ago. It is the oldest gymnosperm left over from the Quaternary glacial movement. The ancient ginkgo trees that are still alive are very rare and scattered. Hundreds of years old trees are very rare, and other plants in the same class have become extinct, so ginkgo trees actually have the title of living fossils.
3. There are 26 varieties or varieties of Ginkgo biloba, such as Ginkgo biloba, Ginkgo biloba, Ginkgo biloba, Ginkgo biloba and Ginkgo biloba.
4. Ginkgo biloba is a deciduous tree, and its DBH can reach 4m. The bark of young ginkgo is very smooth and light gray. The bark of adult Ginkgo biloba is grayish brown, and then it has irregular longitudinal cracks and roughness. There are long branches and slow-growing short branches.
5. Ginkgo biloba has a long life and is suitable for growing in subtropical monsoon climate zone with superior hydrothermal conditions. Generally, the soil is yellow soil or yellow brown soil, and the appropriate pH value is 5 ~ 6. Generally, ginkgo biloba grows slowly in the early stage. Generally, female plants begin to bear fruit in about 20 years, and ginkgo trees can still bear fruit normally after 500 years. Generally speaking, ginkgo trees begin to sprout and grow leaves from late March to early April, bloom from early April to mid-April, mature seeds from late September to early June, and finally shed leaves from late June to110.
6. The fruit of ginkgo tree is what we usually call ginkgo, so ginkgo tree is also called ginkgo tree. Ginkgo trees grow slowly and have a long life. Because the fruit is slow, some people call ginkgo tree "Gongsun Tree", which means "the male plant is edible".
7. Ginkgo biloba, also known as ginkgo biloba, has the effect of health preservation and longevity, so it was listed as a royal tribute in the Song Dynasty. From the perspective of the whole world, Japan also has the habit of eating ginkgo every day, while westerners must eat ginkgo at Christmas. As far as the edible methods of Ginkgo biloba are concerned, there are mainly fried food, roasted food, cooked food, side dishes, cakes, candied fruit, canned food, drinks, alcohol and so on. Ginkgo biloba leaves have expectorant, antitussive, lung moistening and antiasthmatic effects.
8. However, Ginkgo biloba contains hydrocyanic acid toxin, which is very toxic, but the toxicity will be reduced after heating, so it is easier to be poisoned by eating raw ginkgo fruit. Generally, the dose of ginkgo poisoning is 10 ~ 50, and symptoms will appear after eating ginkgo 1 ~ 12 hours. Therefore, in order to prevent ginkgo poisoning, we should not eat more ginkgo, let alone eat ginkgo raw.