以最近3次森林资源调查数据为基础,布设标准地进行典型调查,研究毛赤杨林演替规律,结果发现了草甸植被变为毛赤杨林；毛赤杨林变为白桦林；草甸植被变成毛赤杨林,继而又变成含有白桦或其幼苗、幼树的毛赤杨林；毛赤杨林演变为草甸植被4种毛赤杨林演替规律.文中对演替的原因进行了分析,提出毛赤杨林保护建议.%Taking recent 3times forest resources investigation data as basis and setting standard plots, we conducted typical investigation to study succession trend of Alnus sibirica, results showed that there were four succession trend; meadow vegetation changing into Alnus sibirica forest; Alnus sibirica forest changing into white birch forest; meadow vegetation constantly changing into Alnus siberica forest, from containing few seedling and young Alnus siberica tree to Alnus siberica forest combined with seedling and young trees of white birch forest. Reasons of succession trent have been analyzed and protection suggestion for Alnus sibirica also been put forward.
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