杨树是目前吉林省西部风沙干旱草原地区营造农田防护林带和用材林的重要树种。种籽杨树一般在5月下旬—6月上旬种籽成熟,不论由外地或本地采种,每年最早能在6月中旬开始播种,由于播种期晚,苗木生长期减少,加之吉林西部的恶劣环境条件,因而常使当年 Poplar is an important tree species for planting farmland shelterbelts and timber forests in the windy arid steppe region of western Jilin Province. Seed poplar Generally in late May - early June seed maturity, either by field or local seed, the earliest start of planting in mid-June each year, due to late sowing, seedling growth period reduced, combined with the harsh environment in western Jilin Conditions, which often make the year