论文部分内容阅读
过伐林是原始阔叶红松林经不合理采伐后仍保持０．４以上郁闭度的林分，现有的过伐林大多是自原始林破坏后已经历了３０多年自然恢复过程的群落。以长白山林区典型的过伐林区─—白石山林区为例，分析了过伐林群落中不同树种间的联结情况．结果表明，过伐林中树种间的联结特性主要是与它们本身的生物学、生态学特性有关，但也多少受人为选择性采伐的影响．在白石山林区过伐林中，有显著相关的树种对占总树种对的１９．２３％，其中呈正相关的占７．６９％，呈负相关的占１１．５４％．
Over-deforestation is the stand of the original broad-leaved Korean pine forest which remains over 0.4 after the unforeseen harvesting. The existing over-deforested stands are mostly those communities that have undergone natural recovery for more than 30 years since the destruction of the original forest . Taking the typical over-cut forest area-Baishishan forest area in Changbai Mountain as an example, this paper analyzes the connection among different tree species in over-cut forest. The results showed that the interspecific associations of tree species in over-cut forests were mainly related to their biological and ecological characteristics, but were also somewhat affected by anthropogenic selective harvesting. Among the over-cutting forests in Baishishan Forest Region, 19.23% of the total tree species were significantly related, of which 7.69% were positively correlated and 11.54% were negatively correlated.