摘要
兰州地区位于甘肃中部，大部分地区属温带干旱气候，年均温6．9℃，河谷盆地气温较高，西部、北部及山区气温一般较河谷盆地低2℃～5℃。经过调查，共采集植物标本310份，通过对植物标本鉴定，整理出兰州地区草本植物有125种，隶属于86属、27科，以多年生、中生植物为主。区系中以单型属和少型属居多，有中国特有属，无甘肃特有属。根据吴征镒先生《中国种子植物属的分布区类型》的划分方法，共有8个分布区类型和6个变型。在属级水平上世界分布和温带成分明显，分别占27．9％和45．3％；热带成分占16．3％，有东亚、中亚和地中海区系成分有少量渗入。此调查研究能够全面了解兰州地区野生草本植物的分布及生长情况，为以后的研究提供参考依据，调查研究的野生草本植物也是牧草栽培引种驯化、牧草育种、人工草地建设、环境绿化和植被恢复的基础，同时对兰州地区境内的野生草本植物的生活型，属种组成、植物区系地理成分作了分析，旨在为兰州地区植物种质资源的保护、开发与利用提供参考依据。
Lanzhou is located in the central part of Gansu ranging from east longitude of 102°45′ to104°30′ and northern latitude of 35°32′ to 37°05′. Most part of Lanzhou belongs to arid climate in temperate zone with annum average temperature 6.9 ℃, and Valley Basin often has high temperatures, but the temperature in north- ern and western mountain is generally lower than Valley Basin by 2.5 ℃. All above factors lead to obvious fea- tures in Lanzhou with diverse types of herbs, complex flora characteristics, significant habitat discrepancy and fragile ecology. After investigation more than one year, 310 specimens of plants are collected and identified. It＇s concluded that there are about 125 herb species in Lanzhou, referring to 86 genera, 27 families, most of them belong to perennial and mesophyte. There are Chinese endemic genera instead of gansu endemic genera, with plenty of monotypic genus and oligotypic genus in flora. According to The Areal - types of the Chinese genera of Seed Plants,written by Wu Zhengyi. There are 8 areal types and 6 subtypes. The Cosmopolitan and temperate distributional type is the main type,which accounted for 27.9% and 45.3%. Tropic ingredient proportion is 16.3%. The East Asia, the central Asia and the Mediterranean flora ingredient are mixed in this area.
出处
《青海草业》
2011年第2期45-53,56,共10页
Qinghai Prataculture
关键词
兰州南北两山
草本
种质资源
区系
South and north mountains of Lanzhou
Herbs
Germplasm resources
