有计划地引种国内外优良树种以丰富森林资源,改良现有树种,创造新品种和提高林木生产,是当前发展我国园林事业主要任务之一。所谓引种,就是把一个树种引到它现在自然分布范围以外的而环境条件基本相同或近似的地区进行栽种。如果引种地区的生态条件(如纬度、海拔的高低、光照、温度、水分、土壤等)能满足引种树木生长发育的要求,它就能 It is one of the main tasks to develop the garden business in our country to plan the introduction of excellent tree species both at home and abroad in order to enrich the forest resources, improve the existing tree species, create new varieties and improve forest production. The so-called introduction, is to introduce a tree species it is now outside the scope of the natural distribution of the same or similar environmental conditions for planting. If the introduction of ecological conditions (such as latitude, elevation, light, temperature, moisture, soil, etc.) to meet the requirements of the introduction of tree growth and development, it can