白桦天然次生林种群种间关联及演替规律的研究

白桦（Betula platyphylla）是天然次生林生态系统演替过程中著名的先锋树种，在维持地区生态平衡等方面发挥着重要作用．本文选择太岳山国家森林公园七里峪林区为研究区域，分析白桦种问关联及其群落演替的规律，研究结果表明：（1）通过，检验，30个物种对中有18对种间关联极显著．白桦与所调查物种的联结系数均为正，物种之间是互利共生的关系．研究区内白桦处于增长期，物种之间关系密切；（2）在次生林演替过程中．白桦处于第3演替阶段，它是一个较不稳定的森林群落，随着群落演替，白桦林可能被油松、辽东栎取代．

Study on Interspecific Association and Community Succession of Betula Platyphylla Natural Secondary Forest

Betula platyphylla is one of the well-known pioneer species m natural seconuary iorest ecosystems, has an important effect on ecological balance. We selected Qiliyu Forest Zone of Mt. Taiyue, where is the most concentrating zone of the population, as research zone. We analyzed the interspecific association and community succession. The results were as follows ： （ 1 ） The interspecific associations of 30 tree species in the community were examined by means ofx2 -test. 18 species pairs are significantly negative association. Different species reap a great deal of benefit from each other. （2） In the process of secondary forest suceession,Betula platyphylla in 3 successional stages is a relatively unstable forest communities. With the community evolution, they are likely to be re- placed by Pinus tabulaeformisr community and Quercus liaotungensis community.