目前,落叶松育苗由于对圃地条件要求高、投资多、用工量大、作业技术繁杂,很难在生产中推广,因而不能满足广大山区群众造林的需要。所以,改变当前落叶松育苗的圃地条件,采用经济简便的育苗方法,来推广群众就地育苗、就地造林的经验,是十分迫切而必要的。1966年春,我们遵照毛主席“敢于革命”的教导,根据树种天然更新的特性,采用林冠下培育落叶 At present, larch seedling nursery can not meet the needs of mass afforestation in mountainous areas due to the high requirement on nursery land, large amount of investment, large amount of labor and complicated operation techniques. Therefore, it is urgent and necessary to change the conditions of nursery land for Larix kaempferi nursery plant and to adopt the simple and convenient nursery method to popularize the experience of nursery plants and afforestation in situ. In the spring of 1966, following the teachings of Chairman Mao and “daring to revolutionize”, according to the natural regeneration of tree species, we cultivated fallen leaves under canopy cover