该文通过对 7个毛白杨三倍体和 3个二倍体无性系的花序量、花粉量及生命力、种子品质的比较研究和生殖器官形态的观察 ,发现三倍体无性系的花序量明显比二倍体的少 ;雄性无性系每个花序的花粉量及其发芽率在三倍体和二倍体之间差异不大 ;而三倍体雌性无性系的结实能力、果实形态大小和种子品质明显较二倍体的差 .结果表明三倍体毛白杨的有性生殖能力较低 ,因此 ,种植三倍体毛白杨将会减少毛白杨早春散粉和飞絮对环境的污染 . In this paper, we observed the inflorescence, the pollen amount and vitality, the comparative study of the seed quality and the morphology of the reproductive organs in seven poplar trions and three diploid clones, and found that the inflorescences of the triploid clones were obvious Less than diploid; the pollen amount and its germination rate of each inflorescence of male clones are not much different between triploid and diploid; however, the ability of triploid female clones to grow, the shape of fruit and the seed The results showed that the triploid Populus tomentosa sexual reproductive ability is low, therefore, the planted triploid Populus tomentosa Populus tomentosa will be reduced in early spring loose powder and Fei Xu pollution of the environment.