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杨树在我国分布很广,从新疆到东部沿海,从黑龙江、内蒙古到长江流域都有分布。不论营造防护林或用材林,杨树都是主要的造林树种。尤其近十多年来,我国杨树造林面积不断扩大,已成为世界上杨树人工林面积最大的国家。杨树具有早期速生、适应性强、分布广、种和品种多、容易杂交、容易改良遗传性、容易无性繁殖等特点,因而广泛用于集约栽培。重点介绍了小乘黑杨树的育苗技术和造林技术,以及如何进行杨树病虫害防治。
Poplar is widely distributed in our country, from Xinjiang to the eastern coast, from Heilongjiang, Inner Mongolia to the Yangtze River Basin are distributed. Regardless of creating shelterbelts or timber forests, poplar is the main afforestation tree species. In recent 10 years, the area of afforestation in our country has been expanding constantly and has become the largest poplar plantation in the world. Poplar has the characteristics of early rapid growth, strong adaptability, wide distribution, multiple species and varieties, easy hybridization, easy heredity improvement and easy asexual reproduction. Therefore, poplar is widely used in intensive cultivation. It focuses on the nursery techniques and afforestation techniques of the aster Poplar trees and how to control poplar pests and diseases.