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杨树是实现北京地区绿化和农村木材自给的主要速生树种。但杨树品种复杂,不同品种的适生条件,抗性,生长速度,木材价值等方面又都不尽相同。回顾我市杨树的发展情况是:自解放初期的美杨;到五十年代末期的加杨;六十年代以来的北京杨、箭杆杨、新疆杨;到七十年代推广的群众杨、沙兰杨、15号杨等。几经品种更替,由于未能提出它们的不同适生条件,有的地区不是因地裁种,给林业生产发展也造成了一些紊乱和损失。 1975年10月在北京市召开了杨树良种及其丰产技术经验现场评选会,确定出杨树良种及部分杨树良种的森材物理力学性质、造纸性能以及木材加工使用的比较鉴定,做为品种配套和宣传推广的依据。
Poplar is the main fast-growing tree species for afforestation and rural wood self-sufficiency in Beijing. However, poplar varieties are complex, different varieties of suitable conditions, resistance, growth rate, timber value and so on are different. Recalling the development of poplar in our city are: since the liberation of the United States Yang; to the late 1950s Yang; since the 1960s Beijing Yang, arrow Yang, Xinjiang Yang; populace to promote the seventies Yang, Sally Young, No. 15 Yang and so on. After several varieties of replacement, due to their different living conditions can not be presented, and some areas are not cut because of places, to the development of forestry has also caused some disruption and loss. October 1975 in Beijing held a poplar seeds and high-yielding technical experience on-site selection will determine the poplar varieties and some poplar varieties of wood physical and mechanical properties, papermaking and wood processing and use of comparative identification as Variety support and promotion of the basis.