昭通北部地区稀有植物十齿花群落特征

Study on Community Characteristics of Rare Dipentodon sinicus in Northern Zhaotong

运用样方法对昭通北部地区的十齿花群落进行调查，结果表明：在面积2000 m2的样地内共有维管植物124种，隶属于56科86属，蔷薇科、壳斗科、樟科、冬青科、山矾科、百合科等为群落主要组成科；群落可划分为十齿花－金佛山方竹群丛（海拔2000～2100 m）、十齿花－绥江玉山竹群丛（海拔1900～2000 m）2个群丛；群落物种多样性指数、Pielou均匀度指数为草本层＞乔木层＞灌木层，与暖温带落叶阔叶林的物种多样性特征相似；从径级结构、树高结构来看，十齿花种群为增长型种群，群落能长期保持其稳定性。

The communities of Dipentodon sincus in Northern Zhaotong of Yunnan Province was studied based on the quadrate meth-ods.The result shows that：there are 124 species of vascular plants,which belonged to 56 families,86 genera.The main families are Ro-saceae,Fagaceae,Lauraceae,Aquifoliaceae,Symplocaceae,Liliaceae,which revealed the characteristic of subtropical evergreen broad-leaved forest.The community can be divided into Dipentodon sinicus,Chimonobambusa utilis Comm.associations （2000~2100 m） and Dipentodon sinicus,Yushania suiiangensis Comm.associations （1900~2000 m）.Species diversity index and Pielou evenness index were herb layer〉tree layer〉shrub layer similar to the warm temperate deciduous broad-leaved forest.From the size structure and tree height structure,the communities of Dipentodon sincus are a growing population community and maintains its long-term stability.