一、技术优点(一)充分利用杨树伐根嫁接亲合力强、可再生的特点,将伐根变废为宝。(二)可将纯林改造成不同品种不同林龄的混交林、异龄林,使林分结构趋于合理,生物种群趋于稳定,增强林分抗病虫能力。(三)提高效益。当年嫁接苗生长量与2～3年生杨树大苗相 First, the technical advantages (a) make full use of poplar rootstock grafting affinity, renewable features, will be transformed into scrapped treasure. (II) The pure forest can be transformed into mixed forest and heterogeneous forest with different ages, so that the stand structure tends to be reasonable, the biological population tends to be stable, and the pest resistance of the forest stands is enhanced. (C) to improve efficiency. The amount of grafted seedlings and 2-3 years old poplar seedlings phase