广西木论国家级自然保护区植物物种多样性初步研究

广西木论国家级自然保护区位于我国滇黔桂植物区和华南植物区的交错地带，是古北极与古热带两大植物区系交接过渡的中心地带，在我国生物多样性保护区域中占据不可替代的地位。为摸清广西木论国家级自然保护区植物物种多样性，该文基于历史文献整理、野外调查、标本采集和鉴定以及数据统计分析，对该保护区维管束植物物种多样性组成及其特点进行了研究。结果表明：(1)该区共有维管束植物1 735种，包括石松类和蕨类植物218种、种子植物1 517种，具有较丰富的维管束植物多样性组成以及较复杂的植物区系成分。(2)该区共有中国特有植物486种、广西特有植物56种、岩溶特有植物262种，具有显著的植物特有性。(3)该区共有国家重点保护野生植物68种、广西重点保护野生植物153种、我国极小种群野生植物4种、受威胁植物108种、列入《濒危野生动植物种国际贸易公约》(CITES)附录植物144种，具有较高程度的植物珍稀濒危性。综上表明，该区是我国重要的岩溶植物基因库，具有极其重要的保护价值。该研究结果为自然保护区的建设和管理、植物保护和利用以及其他科研工作的开展提供了重要依据。

Primary study on species diversity of plant in Guangxi Mulun National Nature Reserve

Guangxi Mulun National Nature Reserve is located in the crisscross zone of Dian-Qian-Gui flora and south China flora, also is the heartland of the transition zone about Palaeoarctic flora and Palaeotropical flora. It plays an irreplaceable role in biodiversity conservation areas of China. In order to explore the plant species diversity in Guangxi Mulun National Nature Reserve, the composition and characteristics of vascular plant diversity was studied based on historical literatures, field investigations, specimens collection and identification, and data statistical analysis. The results were as follows:(1)This reserve had 1 735 species of vascular plants, including 218 species of lycophytes and ferns, 1 517 species of seed plants, with abundant vascular plant diversity and complex floristic composition.(2)This reserve had 486 species endemic to China, 56 species endemic to Guangxi, and 262 species endemic to karst areas, with significant plant endemism.(3)This reserve had 68 species of national key protected wild plants, 153 species of Guangxi key protected wild plants, 4 species of extremely small population wild plants in China, 108 threatened plants, and 144 plants listed in the appendix of the Convention on International Trade in Endangered Species of wild Fauna and Flora(CITES), with relative high degree of rare and endangered plants. Based on the results, Guangxi Mulun National Nature Reserve is an important gene bank of karst plants. It has extremely important conservation value. This study also provides important basic data for construction and management of this Reserve, protection and sustainable utilization of plants, and other scientific research works.