胡杨（Populusdiversifolia）是天山南北平原地区落叶乔木树种之一，具有很强的抗逆性，耐盐、耐涝、抗旱、抗寒、抗沙埋。由于胡杨幼苗期生长缓慢，按常规育苗一般2～3年出圃，不能满足造林的需要，同时土地利用率和育苗经济效益低。近几年来，我们对胡杨育苗进行了不同播种期 Populus diversifolia is one of the deciduous tree species in the northern and southern parts of Tianshan Mountains. It has strong stress resistance, salt tolerance, waterlogging resistance, drought resistance, cold resistance and sand resistance. Due to the slow growth of Populus euphratica seedling, nursery plants are generally out of nursery for 2-3 years according to conventional methods, and can not meet the needs of afforestation. At the same time, land utilization and economic benefits of nursery are low. In recent years, we conducted different sowing dates for Hu Yang nursery