祁连山金强河流域莎草科植物区系特征分析  

Analysis of floristic characteristics of sedge family in Jinqiang River basin of Qilian Mountain

作　　者：王霞 方强恩[1] 刘艳 贾秀秀 杨艳丽 白小明[1] WANG Xia;FANG Qiang-en;LIU Yan;JIA Xiu-xiu;BAI Xiao-ming(Pratacultural Science College of Gansu Agricutural University,Grassland Ecosystem Key Laboratory of Ministry of Education,Si-no-U.S.Research Centers for Sustainable Grassland and Livestock Management,Lanzhou 30070,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,中‐美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2023年第1期73-81,共9页Grassland and Turf

基　　金：甘肃省林草局草原生态修复治理科技支撑项目(GSLC-2020-3)(LCJ20210021)。

摘　　要：【目的】植物区系分析是科学开发利用和保护植物资源的重要前提。祁连山金强河流域位于青藏高原与黄土高原交界处,区位特征独特,莎草科(Cyperaceae)植物作为该地区的优势植物,对其进行资源调查和区系分析尤为重要。【方法】通过搜集文献、核实鉴定馆藏植物标本,编制祁连山金强河流域莎草科植物名录,分析莎草科植物科属特征和区系成分。【结果】祁连山金强河流域莎草科植物共有6属53种(4变种),其中,多种属2个,为薹草属(Carex)和嵩草属(Kobresia),寡种属1个,为扁穗草属(Blysmus),单种属3个,为三棱草属(Trichophorum)、细莞属(Bolboschoenu)和蔺藨草属(Isol⁃epis),特有种9种;从各属包含的种数上来看,单种属和寡种属所含种的比例只占5.66%和3.77%,而多种属所含种的比例达到90.57%,占据明显的主导地位;植物区系成分包括世界分布型和北温带型2个分布区类型,世界分布型有4属40种,北温带型有2属13种。【结论】祁连山金强河流域莎草科植物区系成分总体简单,但莎草科植物资源丰富,特有种和世界分布型植物数量较多,具有重要的开发利用潜力。【Objective】Flora analysis is an important prerequisite for scientific development,utilization and protection of plant resources.The Jinqiang River basin of Qilian Mountain is located at the junction of Qinghai-Tibet Plateau and Loess Plateau,with unique geographical characteristics.As the dominant plants in this region,it is very important to conduct resource investigation and floristic analysis on Cyperaceae.【Method】In this study,a list of sedge plants in jinqiang river basin of Qilian Mountain was compiled by collecting literature,verifying and identifying plant specimens,and analyzing the family and genus characteristics and flora components of sedge plants.【Result】The results showed that there there 53 species(4 varieties)of sedge plants belonging to 6 genera in Jinqiang River basin of Qilian Mountain,including 2 multiplegenus(Carex and Kobresia),1 oligotypicgenus(Blysmus),3 monotypicgenus(Trichophorum,Bolboschoenus and Isolepis)and 9 endemic species.In terms of the number of species contained in each genus,the proportion of species contained in single and oligotypic genera was only 5.66%and 3.77%respectively,while the proportion of species contained in multiple genera was 90.57%,occupying a distinctly dominant position.The floristic composition included two distribution types:the world distribution type and the north temperate type.The world distribution type had 40 species in 4 genera and the north temperate type had 13 species in 2 genera.【Conclusion】In conclusion,the cyperaceae flora in Jinqiang River basin of Qilian Mountain is simple on the whole,but the cyperaceae plant resources are rich,and there are a large number of endemic species and worldwide distributed plants,which has important potential for development and utilization.

关 键 词：植物区系 莎草科 金强河 祁连山 

分 类 号：Q949[生物学—植物学]