大青杨树(Populus ussuriensjs KOMAROV)是我省长白山地区生长快、材质好、环境适应性强、抗性强的优良乡土树种,由于它的种子调制和保存(特别是越年保存)困难,除元性繁殖外,多年来均采用夏季种子成熟季节现采现育的办法培育苗木.而且在种子加工调制过程中,因为种粒小,种絮密,种子散失和机械损伤太多,利用率不高,因此种子调制与播种方法已成为大青杨树育苗造林的关键性问题之一.今年 Populus ussuriensjs KOMAROV is an excellent native species that grows fast, has good material, strong environmental adaptability and strong resistance in Changbai Mountain of our province. Due to the difficulty of seed preparation and storage In the process of seed processing and modulation, because seed size is small, seeds are dense, seed is lost and mechanical damage is too much, utilization rate is not high Therefore, seed modulation and sowing methods have become one of the key issues of poplar seedling afforestation.