井冈山大学绶草群落植物区系与物种多样性研究

采用样地调查方法，对分布于井冈山大学的国家Ⅱ级保护植物绶草群落的物种组成、区系成分和物种多样性进行了研究。结果表明：井冈山大学绶草群落物种组成简单，共有维管植物16科20属20种，其中蕨类植物和裸子植物均有1科1属1种，被子植物14科18属18种。井冈山大学绶草群落植物科的区系地理成分较简单，以世界分布为主，所占比例高达87.5%；属的区系地理成分较复杂，有7个分布区类型3个变型，区系成分以热带性成分占优势，温带性成分和世界分布所占比例仍较大。井冈山大学绶草群落垂直结构简单，除Pielou指数较高外，其它3种物种多样性指数均较低，群落物种丰富度、Simpson指数、Shannon-wiener指数和Pielou指数的平均值分别为6.20、0.78、2.36和0.91；10个样地间的各种多样性指数测值存在一定的差异，4种多样性指数在绶草群落中的变化趋势不一致。加强绶草自然生长环境和群落物种多样性的保护、合理开发利用是绶草的保护利用策略。

PLANT FLORA AND SPECIES DIVERSITY OF SPIRANTHES SINENSIS COMMUNITY IN JINGGANGSHAN UNIVERSITY

The species composition, flora element and species diversity of Spiranthes sinensis community were studied by the sample method, which distributed in Jinggangshan University and belonged the second-class protection plant in China. The results showed that species composition of S. sinensis community was simple, there are 20 species of vascular plants belonging to 16 families and 20 genera, in which the pteridophyte and gymnosperm account for respectively 1 families 1 genera and 1 species, the angiosperm for 14 families, 18 genera and 18 species. The family flora geographical element of S. sinensis community is relatively simple, and mainly belongs to the world distribution family, accounting for 87.5% of the total number of families. The genera flora geographical element of S. sinensis community is complex, there are 7 distribution types and 3 variants, and is dominated by tropical elements, temperate elements and world distribution genus are also accounting for bigger proportion. The vertical structure of S. sinensis community in Jinggangshan University is simple, with the exception of the pielou index, the richness index, simpson index and shannon-wiener index all are lower with the values of 6.20, 0.78, 2.36 and 0.91 respectively. There were some differences on species diversity among plots, and the variation patterns of the four indexes were inconformity. The conservation and utilization strategy of S. sinensis is to strengthen the protection of the natural growth environment and community species diversity, and achieve rational development and utilization.