一、前言油树适应性强,分布较广,木材坚硬,果实含油较高,是我国北方重要木本油料树种之一。近几年来,我省许多地区和单位开始大面积育苗、造林,由于油树果实用冷榨法榨油后,种子外表还附有油脂和蜡质,种壳坚硬,透水通气性差,难以吸水发芽,加 I. Introduction The tree has strong adaptability, wide distribution, hard wood and high fruit oil content, and is one of the important woody oil tree species in North China. In recent years, many areas in our province and units began large-scale nursery, afforestation, as a result of oleander fruit cold pressing method, the seeds are also accompanied by oil and waxy appearance, shell hard, poor water permeability, it is difficult to absorb water bud ,plus