威远江自然保护区思茅松种群的林窗更新研究

在野外考察的基础上，运用径级结构、高度结构的方法对思茅松种群的林窗更新进行研究，研究结果表明：思茅松纯林的林窗更新与灌草层盖度，尤其是草本层盖度密切相关。灌木层盖度的大小影响幼苗的存活，灌木层盖度小，幼苗存活率高。草本层盖度的大小影响种子的萌发，草本层盖度小，种子萌发率高。在针阔混交林林窗中，当常绿阔叶树稀少或土层浅薄时，思茅松更新个体年龄差异大，当常绿阔叶树长势好且密度较大时，思茅松更新个体年龄普遍差异较小。

A Study on the Gap Generation of Pinus kesiya var. langbianensis in Weiyuanjiang Nature Reserve

Based on the field survey, the gap generation of the population is analyzed through DBH structure and height structure. The results show that the Pinus kesiya vat. langbianensis generation in gaps is related to the shrub and herb cover, especially the herb cover. The shrub cover influences the survive of seedlings, and the low shrub cover induces high germination of the seeds. In the gap of coniferous and broad-leaved mixed forest, the age of the pine individuals differs greatly when the evergreen broad-leaved trees are sparse and the soil is thin; on the contrary, the pine individuals differ slightly in age when the evergreen broad-leaved trees are densely and well grown.