利川市楠木群落特征研究

Community Characters of Phoebe zhennan S.Lee in Lichuan City

采用典型选样法,在湖北省利川市天然楠木群落设置了8个20 m×30 m的样地进行调查,记录样方内的物种及其株高、胸径、数量,对楠木种群内的物种组成、群落内植物属的区系分布特征、群落特征进行分析。结果表明,湖北利川楠木群落具有四大特点:1)物种组成丰富,共有维管束植物338种,隶属于117科261属,物种多样性较高;2)群落属稳定型群落,具备天然更新能力;3)楠木群落是以楠木为优势种群构成的单优群落;4)群落生境较适宜,群落资源十分珍稀。

In order to analyze the species composition, flora distribution characteristic, and community characters of the P. zhennan communities in Lichuan City, this study adopted typical sample selection method to investigate the species, plant height, DBH （diameter at breast height） and quantity in eight sites of 20 m × 30 m. The result showed that P. zhennan communities have 4 main characters ： （ 1 ） there were abundant plants species in P. zhennan communities, including 338 vascular plants species from 117 families, 261 genera, the plant species diversity indexes were high; （2） the communities belonged to the stable type, which had the ability to finish the natural regeneration; （3） P. zhennan communities were mono- dominant communities, which composed with P. zhennan as the dominant population; （4） the eco - tope is suitable for P. zhennan communities in Lichuan, and the community resource is very rare.