一、材料与方法本试验材料以华北落叶松为主,少量长白落叶松、兴安落叶松和日本落叶松。相同试验处理的容器苗是以同时间播种发芽较一致的容器苗做试材。使用简易聚乙烯塑料小棚为光照处理场所;约13米~2范围内设40w 日光灯管1支,灯管离苗约1米。夜间光照强度提高达500Lux。对照棚不延长光照(不设灯管)。其处理分别是:1、8月分播种及头一年播种的早期封顶的容器苗分三组移入光照棚,对照棚。观 First, materials and methods The test materials to Larix principis-rupprechtii, a small amount of Larix, Larix gmelinii and Japanese larch. The same experimental treatment of container seedling is the same time planting more consistent container seedling material. The use of simple polyethylene plastic shed for light treatment sites; about 13 m ~ 2 within the scope of a 40w fluorescent tube, lamp from the seedling about 1 meter. Night light intensity up to 500Lux. Control studio does not extend the light (no lamp). The treatment is respectively: In August and August seeding and the first year sowing of the early capped container seedlings were divided into three groups into the light shed, control shed. View