白榆又称榆树或家榆,是榆科榆属的落叶乔木。由于白榆生长快、材质好、用途广、适应性强,深受广大群众喜爱,所以,白榆人工林面积不断扩大,成为普遍栽培树种之一。白榆的育苗方法主要为播种育苗。我区的榆树种子五月下旬成熟,应抓住时机随采随播。平原农区播种白榆,对种子一般不作催芽处理。最好搓去果翅,使种子撒播均匀。经长途运输调入的种子或隔年贮藏的种子,播种前可与湿沙混拌,每天翻动2—3次,2—3天后,待1/3 Elm Ulmus, also known as elm or elm, Elm Ulmus deciduous trees. As elm grow fast, good material, wide use, adaptability, loved by the masses, therefore, Ulmus umbellatus plantation area continues to expand, become one of the commonly cultivated species. The elm seedling cultivation methods mainly sow seedlings. Elm seeds in my area mature in late May, should seize the opportunity with the companion. Plain planted elm elm, the seeds are generally not for germination. It is best to rub the wings to spread the seeds evenly. Transferred by long-distance transport of seeds or seeds stored next year, sowing before mixing with wet sand, turning 2-3 times a day, 2-3 days later, to be 1/3