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Walnuts, also known as walnuts and Qiang peaches, are walnut plants. And almond, cashew nuts, hazelnut and known as the world's four largest dry fruit". Walnuts are rich in nutrients, hectogram containing 15~20 grams of protein, more fat, 10 grams carbohydrates; and contain essential calcium, phosphorus, iron and other trace elements and minerals, and carotene, riboflavin, vitamins etc.. Beneficial to the human body, can strengthen the brain. Is one of the popular nut foods. It is called "long live son" and "longevity fruit"".

alias

Also called Qiang peach, walnut. In Shaanxi, Luo and many areas. Walnut tree, the leaf is thick and leafy, March flower like chestnut, the eight, September, shaped like a green peach. The fruit has a shell and is picked when autumn and winter are ripe.

Historical origin

Chinese people used to think that walnuts were introduced by Zhang Qian in the Han Dynasty from the western regions, but today's research shows that walnut is not a place but a source of many places, and China is also one of the country of origin. There are 7 genera and 28 species of walnut plants in China. They are now basically determined. There are 4 species native to China: Juglans mandshurica, Juglans mandshurica, Juglans mandshurica and Hebei walnut.

1972 found Cishan cultural sites, in the magnetic Hill excavation site of the ash pits, found two a pit at the bottom of a seed layer, which can be identified with hazelnuts, walnuts and celtis. Walnut is today's walnut, previously believed that the walnut is the Han Dynasty, Zhang Qian through the western regions into the mainland, the magnetic mountain site walnut unearthed, confirmed that more than 7000 years ago, this area has planted.