【摘要】 <正> 以阔叶红松林为顶极植被的小兴安岭林区,红松在原始林下天然更新不良,幼树生长缓慢,往往老龄个体远多于中、幼树个体数量,人们称为“红松林下无红松”。因而有人认为红松是衰退种,要在群落的演替中淘汰掉。本文从红松的生物学和生态学特性出发,探讨其种群动态的规律。以逐步认识这一自然实体发展变化的本质。更多还原

【Abstract】 Pinus koraiensis have two distinguished features.One is the long lifespan and another is thelarge biomass in the natural mature forest.Just the two characteristics consist of their ownspecific pattern in when the light intensity in the community dominated by Pinus koraiensisbecomes too poor for the pine seedlings to grow,the increasing rate of the pine tree popu-lation decreases.Then the fast-growing broad-leaved trees population increases with the dec-reasing pine individuals in the community.In the meantime the canopy of the broad-leavedtrees creates a suitable condition for the young pine trees to grow.Finally the pine trees be-come dominant species in the community again.更多还原