核桃是重要的木本油料和珍贵的干果。它生长迅速、适应性强,也是优质用材树。核桃在我国分布很广、有两千多年栽培历史,但由于多数地区习惯采用实生繁殖,至今末能形成品种,目前所叫的“品种”大部分都是根据地区或果实特征命名的。例如:新疆核桃、石门核桃、绵瓤核桃、露仁核桃等。这些都是实生后代,性状分离很大,不是真正的“品种”。我国目前生产上栽培的核桃类型复杂,品质差异悬殊。从产量来看,在同样立地条件下,同龄树 Walnut is an important woody oil and precious dried fruit. It grows rapidly, adaptability, is also a good use of timber trees. Walnuts are widely distributed in our country and have a history of more than two thousand years of cultivation. However, since most areas are accustomed to adopting real-life breeding, the varieties can be formed at the present, and most of the varieties now called are based on the regional or fruit characteristics. For example: Xinjiang walnut, walnut Shek Mun, Mianpi walnut, walnut and other Luren. These are real offspring, traits great separation, not a real “variety.” China’s current production of walnut cultivation of complex types, quality differences disparities. From the yield point of view, in the same site conditions, the same age tree