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一、前言杨树是全国广泛种植的树种,也是我区主要林木树种之一。它适应性强、生长迅速,是“四旁”绿化,水土保持,农田防护的主要树种,杨树育苗是提供绿化或造林的特质基础,按
I. Introduction Poplar is widely planted throughout the country and is also one of the major tree species in our region. Its adaptability and rapid growth are the main tree species of afforestation, soil and water conservation and farmland protection in the “four sides”. Poplar seedling nurturing is the basis of afforestation or afforestation. According to