The seedbank of Larix principis-rupprechtii under canopy is big enough in fourforest types to provide seed for regeneration in forest gaps after canopy disturbance instudy area.

• 华北落叶松天然林林下土壤种子数量较大，在出现林冠干扰时有足够的种子为迅速占领林隙提供基本保证。