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大冷杉(Abies Lasioscarpa(Hook)Nutt.)林天然更新不良,在落基山中部主要是一个管理问题.以往的观测和研究揭示了天然更新成功的三个基本必需的条件——(1)大量有生机的种子来源;(2)良好的苗床条件;(3)一个适合于种子发芽和生存的环境.环境因子常常制约了英格曼云杉的更新,因而这项研究是要认识限制因子以及决定在培育实验中需要增添那些措施,以满足云杉更新所适应的环境条件.
The poor natural regeneration of the Abies Lasioscarpa (Hook) Nutt, which is primarily a management problem in central Rocky Mountain, has revealed three basic and necessary conditions for the success of natural regeneration - (1) (2) a good seedbed condition, (3) an environment suitable for seed germination and survival, and environmental factors often constrain the regeneration of Ingermania spruce, so the study is to understand the limitations and determine In nurturing experiments, those steps need to be added to meet the environmental conditions to which the spruce regeneration is adapted.