很多人喜欢吃核桃,因为其营养丰富,富含蛋白质、亚油酸、亚麻酸以及多种维生素和微量元素,是世界著名的“四大干果”之一。核桃是重要的经济树种,广布于北美洲、欧洲和亚洲的多个国家和地区,在我国24个省(市、区)有栽种,其中,云南、陕西、山西、四川和河北等省为主要的核桃生产大 Many people like to eat walnuts, because of its nutrient-rich, rich in protein, linoleic acid, linolenic acid and a variety of vitamins and trace elements, is the world famous “four dried fruit” one. Walnut is an important economic tree species widely distributed in many countries and regions in North America, Europe and Asia. It is planted in 24 provinces (cities and districts) in China. Among them, Yunnan, Shaanxi, Shanxi, Sichuan and Hebei provinces are The main production of walnut