世界上树木种质资源繁多，分有很不平衡，从外地引入有价值的树木可以改变现有树种布局，丰富树木种质资源，提高林业生产率，增加木材产量，美化城乡，改善生态环境。伊犁地区处欧亚腹地，由于地理气候条件，原生的乔灌木种类贫乏。据调查乡土树种仅有26科，52属，143种，但真 There are many tree germplasm resources in the world with very uneven points. Introducing valuable trees from abroad can change the existing tree species layout, enrich tree germplasm resources, raise forestry productivity, increase timber output, beautify urban and rural areas, and improve the ecological environment. Ili area Eurasian hinterland, due to geographical and climatic conditions, the native species of shrubs poor. According to the survey native tree species only 26 families, 52 genera and 143 species, but true