This genus is distributed in the northern hemisphere of Asia, Europe, America and Africa. Native to China, distributed in Vietnam, Taiwan and mainland China, Liaoning, Inner Mongolia, Beijing, Tianjin, Hebei, Shanxi, Shaanxi, Shandong, Jiangsu, Anhui

Shanghai, Zhejiang, Jiangxi, Fujian, Henan, Hubei, Hunan, Hainan, Guangdong, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Tibet, etc., grows at an altitude of 370-2800 meters. meters, mostly found in mountainous areas.

It has been widely cultivated by artificial. Zunhua chestnut, after the ocean European chestnut and Japanese chestnut, Xinglong County, Qinglong Manchu Autonomous County chestnut produced by the highest sweetness, and soft and sticky taste.

Zunhua chestnut, Houyang chestnut, and European chestnuts and Japanese chestnuts, Xinglong County, Qinglong Manchu Autonomous County, the chestnut produced by the highest sweetness, and soft and sticky taste. Lutian County, Hubei Province, Massachusetts City, Shunhe Township, Huangtugang, Guishan, Yantian River, Muzidian, Zhangjiafan and other townships (townships) townships have a large area of chestnut planting has become one of the Massachusetts City, the local farmers to increase income.

Tongbai County, Henan Province, Shangcheng County and other places are also rich in chestnut. Xingtai County, Hebei Province, the western Taihang Mountains area is widely planted, there is still a millennium chestnut tree remains. p>I. Morphological characteristics:

Chestnut is the chestnut family (beech family) chestnut genus of trees or shrubs in the general term, there are about 7-9 species. China is generally divided into 2 kinds: wild chestnut and hybrid improved chestnut. China's common planting is a hybrid cultivation of improved varieties, because of the large, sweet taste, disease resistance is widely planted in China.

The chestnut is native to the temperate regions of the northern hemisphere, most of the chestnut trees 20 to 40 meters high, for the deciduous trees, only a few are shrubs. All kinds of chestnut trees bear edible nuts, simple leaves, elliptic or long elliptic, 10-30 centimeters long, 4-10 centimeters wide, the edge of the prickly hair-like teeth.

Male and female are monoecious, with male flowers in erect catkins and female flowers alone or several in the involucre. The nuts are enclosed in the involucre densely spiked, which is 5-11 centimeters in diameter, and there are 1-7 nuts in one involucre. Flowering period is May to June, and fruit ripening period is September to October.

Two, history:

Chestnut has a long history. Sima Qian in the Western Han Dynasty in the "Records of the Grand Historian" in the "Cargo Shik Lianzhuan" in the "Yan, Qin Thousand Tree Chestnuts ...... this their people are with the Thousand Husband Husband, etc." a clear record.

"Su Qin biography" in the "Qin said Yan Wenhou day: South of the Jieshi Yanmen's spare, north of the jujube and chestnut benefit, although the people are not fine work, but enough in the jujube and chestnut to carry on, this so-called heavenly capital also" said.

Western Jin Lu Ji for the "Poetry" as a note also said: "Chestnuts, five parties have, but Yuyang Fanyang born of sweet and delicious long, less than the place." This shows that China's working people as early as 4,000 years ago has been cultivated chestnut.

Chestnuts are mostly born in the low hills and gentle slopes and riverbanks, Guangxi Pingle, Anhui Jinzhai, Hebei (Xinglong - 2006, in the State Forestry Administration of the second batch of "China's famous economic forest townships," the review process, Xinglong was named "China's chestnut townships ".

Qianxi - chestnut production base, Kuancheng Manzu Autonomous County - chestnut production base), Shandong (Tancheng chestnut), Hubei (Lutian, Yingshan, Macheng (Yantianhe Town)), Xinyang Luoshan, Xinyang Sunshine Mountain, Xinyang Pingqiao District, Zhen'an in Shaanxi Province and so on are all famous chestnut production areas.

References:

Baidu Wiki -Chestnut