【摘要】 [目的]探索北京市低效油松人工林林分结构特征。[方法]对北京市低山区低效油松人工林进行样地调查,分析了低效油松人工林的树种组成结构、树高结构和直径结构。[结果]通过分析得出导致该林分低效的主要原因有林分过密、立地条件差、人为干扰和没有适地适树等。[结论]针对引起低效林的主要原因提出了营林和造林过程的建议。更多还原

【Abstract】 [Objective] The structure feature of low function’s pinus tabulaeformis plantation was explored.[Method]With the help of sample plot survey to inefficient Pinus tabulaeformis planted forest in the low mountain of Beijing,the Pinus tabulaeformis’tree species composition,tree height structure and diameter structure were analyzed.[Result]Over crowed,poor stand,human disturbance and no matching species with the site were the main reasons to lead to the forest inefficient.[Conclusion] According to the several main cause of low efficiency,the suggestions for the process of forest culture and management were proposed.更多还原