中文摘要：

以内蒙古大兴安岭兴安落叶松林火烧迹地为研究对象,采用分层取样的方法对群落中植被进行了调查,分析比较了3种不同林型兴安落叶松林群落恢复过程中物种组成及多样性的差异。结果表明：不同林型兴安落叶松林群落各层α多样性指数总体表现为草本层〉灌木层〉乔木层。不同林型兴安落叶松林火烧迹地群落恢复12年后,草本层的Simpson和Shannon-Wiener指数均小于对照样地并呈现出草类-兴安落叶松林〉杜香-兴安落叶松林〉杜鹃-兴安落叶松林的趋势,而在灌木层则各指数均大于对照样地并呈现出草类-兴安落叶松林〉杜鹃-兴安落叶松林〉杜香-兴安落叶松林的趋势。

英文摘要：

In this study, Larix gmelinii forest burned areas were experienced in different forest types. The natural regeneration conditions,community structure characteristics,species composition,community biodiversity were observed and researched in 2015. The results showed that： the alpha diversity index of community each layer in different forest types showed a ranking of herb layer 〉 shrub layer 〉 tree layer. After twelve years, the Simpson and Shannon-Wiener indices in herb layer in 3 different forest types burn-ed areas are less than that of unburned area and showed a ranking of 2003S-G〉2003S-L〉2003S-R, while the indices of burned areas in the shrub layer are greater than that of unburned area and showed a ranking of 2003S-G〉2003S-R〉2003 S-L.