杨树是我区分布较广的乡土用材树种之一,是营造农田防护林、牧场防护林和城乡绿化的重要树种。为了尽快选出适合我区不同区域类型条件的杨树良种,加速实现杨树良种化,一九七三年春我区建立了杨树良种协作网,举办了生产、科研、教学三结合的良种选育训练班,为开展良种选育工作打下了基础。 Poplar is one of the widely distributed native tree species in our district, and is an important tree species for creating farmland shelterbelts, pasture shelter forests and urban and rural afforestation. In order to select the poplar varieties suitable for the different types of areas in our region as soon as possible and speed up the popularization of the poplar species, the cooperation network of poplar varieties was set up in the spring of 1973, and the seed selection of combination of production, scientific research and teaching was held Education training classes, laid the foundation for the breeding of seed breeding.