三峡植物园植物区系组成与分析

A Floristic study of Botanical Garden of Three Gorges

摘要:

于 2016~2017年对三峡植物园范围内 356. 13hm2 林地开展植物资源本底调查,共采集植物标本 878号,调查结 果显示:三峡植物园共有维管植物 145科 400属 786种,其中蕨类植物 22科 26属 38种,裸子植物 8科 27属 41种,被子植 物 115科 347属 707种 。 区系分析表明:33个优势科中,百合科等主产温带或温带分布或含温带成分分布的科有 22科,表 明植物区系属温带性质,且具有过渡区域的特点 。属级水平上,世界分布 171属 , 占全部属数的 45. 7%,表明种子植物区系 分布相对集中,成分较为单 一 。有各类珍稀濒危植物 74种,蕨类植物 22科 26属 38种,金钱松属(pseudolari儿) 、喜树属 (camptotheca)等单种属植物以及细辛属(Asarum) 、半夏属(pinellia)等药用植物,通过引种抢救保护,物种丰富度正不断 提高。

Abstract:

The background investigation of plant resources in 356. 13hm2 woodland were carried out in the Three Gorges botanical garden in 2016~2017. The results shows that:There are 145families, 400genera and 786species of Tracheo- phytas in the Three Gorges botanical garden; Among them, 38species of ferns belonged to 22famlies , 26genera and the gymnosperms belonged to 8 families , 27genera and 41species , and the angiosperms belonged to 115families , 347genera and 707species . The floristic analysis showed that among the 33dominant families , there were 22families , such as Lili- aceae, which mainly grew in temperate or temperate zones or contained temperate zones , and it indicated that the flora belonged to temperate zone and had transitional zone characteristics . At the generic level, 171 genera accounted for 45. 7% of all genera in the world, which indicated that the flora of seed plants was relatively concentrated and the compo- sition was relatively single . There are 74species of rare and endangered plants , and 38species of pteridophytes in 26gen- era, 22families, and pseudolarix, camptotheca, Asarum, pinellia and other medicinal plants . The species richness was increasing through the introduction and rescue and protection .