What is the history of ginkgo trees?

Ginkgo biloba first appeared in the Carboniferous period 345 million years ago. Ginkgo biloba was widely distributed in Europe, Asia and America in the northern hemisphere, widely distributed in the northern hemisphere in Mesozoic and Jurassic, and began to decline in the late Cretaceous. By 500,000 years ago, it was extinct in most parts of Europe, North America and Asia, and only China's was preserved. Ginkgo biloba distribution mostly belongs to artificial cultivation areas, mainly cultivated in China, French and South Carolina. Ginkgo biloba abroad was directly or indirectly introduced from China.

Ginkgo biloba is a rare tree species left over from Mesozoic era, and it is a specialty of China. There are only wild trees in Tianmu Mountain, Zhejiang. They are born in acidic yellow soil with good drainage at an altitude of 500- 1000 meters, and often mix with coniferous and broad-leaved trees such as Cryptomeria fortunei, Torreya grandis and Orchidaceae, and grow vigorously.

Extended data:

Ecological function of ginkgo tree;

The ecological benefits of Ginkgo biloba are mainly reflected in: Ginkgo biloba is not only a fruit tree-dried fruit, but also a tree species, a protected tree species, an insect-resistant tree species, a long-lived tree species and an anti-pollution tree species. Ginkgo biloba is an ideal tree species for fast-growing and high-yield forest, farmland shelterbelt, road shelterbelt, bank protection forest, beach shelterbelt, village shelterbelt, forest-grain intercropping and "four sides" greening.

1, Ginkgo biloba is resistant to pests and diseases, recognized as a pollution-free tree species, and the most ideal tree species for ornamental greening. The greening effect of ginkgo trees is good and the speed is slow. It takes two years for young trees to have good results. It takes 3-5 years to restore the beautiful function of large trees after planting.

2. Ginkgo biloba can purify the air and has the functions of pollution prevention, fireworks prevention and dust prevention. It can naturally purify the air, reduce the content of suspended solids in the air and improve the air quality. Ginkgo biloba has the functions of water conservation, wind and sand fixation, and soil and water conservation. In areas where deforestation, soil erosion and sandstorm erosion are serious, ginkgo shelter forest, shelter forest, road shelter forest, bank protection forest, beach shelter forest, sand prevention forest, etc. Planting is to maintain soil and water and improve the ecological environment.

3. Ginkgo biloba has the function of killing crop diseases and insect pests, especially cotton, spider mite, peach aphid, Chilo suppressalis and so on. Planting ginkgo around agricultural areas is the natural enemy of crop pests and protects crops.

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