一、绪言杨树是一种生长迅速、繁殖容易、应用广泛的树种,也是阔叶树材中的主要纤维用材和其他用途例如胶合单板、层积塑料、镟切制品等的优质材料。因此,随着国民经济建设的发展,发展杨树越来越显得重要。毛白杨在杨树中最能成大材,和其他杨树比较,它的木材的材质,一般也比较好。毛白杨雌雄异株。雄株材质好或雌株材质好?从材性来说,雌株和雄株木材的物理力学性质有无差别?差别多大?要怎样根据用途的不同来加以选择和发展?针对这些问 I. INTRODUCTION Poplar is a kind of high-growth material that grows rapidly, reproduces easily and widely, is widely used in tree species, and also is the main fiber material in broad-leaved trees and other uses such as veneer, laminated plastic and sliced ​​products. Therefore, with the development of the national economy, it is more and more important to develop poplar trees. Poplar in poplar can become the largest timber, and other poplar, its wood material, generally better. Populus dioecious. Male plant material is good or female plant material is good? From the material, the physical and mechanical properties of the female and male plant wood are there any differences? How much different? How to choose according to different uses and development?