甘肃早熟禾属野生植物资源分布研究  

Study on the Distribution of Wild Species of Poa L. in Gansu

作　　者：方强恩[1] 孙英[1] 白小明[1] 王靖婷[1] 孙吉雄[1] 

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：《中国草地学报》2010年第6期39-45,共7页Chinese Journal of Grassland

基　　金：国家科技支撑计划课题(2007BAD52B06);甘肃省自然科学研究基金计划项目(0803RJZA035)

摘　　要：通过野外调查、鉴定分析标本和查阅相关文献,对甘肃省早熟禾属野生植物资源及其分布进行了初步研究,结果表明:甘肃省有早熟禾属植物35种2变种,分属于微药组、早熟禾组、大禾组、林地组、低山组、类早熟禾组、砾地组、泽地组和中亚组9个组,其中低山组种类最多,微药组和早熟禾组次之。从亚区分布看,青藏高原植物亚区种的数量居首(9组30种),占总种数的81%;其次是中国-喜马拉雅森林植物亚区(8组28种),亚洲荒漠植物亚区和中国-日本森林植物亚区在组数和种数上相对较少。从分布地区看,甘南和张掖(祁连山)等寒冷高海拔地区种类最多(33种),占全省的89%,其次是酒泉(阿尔金山)、临夏、陇南、天水和武威,兰州、定西及白银种数贫乏。分析认为,甘南和张掖祁连山地区是甘肃早熟禾属植物的多度中心。The geographical distribution of wild species of Poa in Gansu was studied based on field investigation,literatures and herbarium specimens.The results showed that there are 35 species and 2 varieties of Poa in Gansu,which constitute 9 sections of Poa： Set.Ochlopoa,Set.Poa,Set.Macropoa,Set.Nemorales,Set.Stepposae,Set.Arctopoa,Set.Glareosae,Set.Palustes and Set.Dshungaricae.Among these species,30 species of 9 sections are distributed in Chinghai-Tibet Plateau Subkingdom,accounting for 81% of the total species in Gansu,28 species of 8 sections in Sino-Himalayan Forest Subkingdom,and a few species in Asiatic desert Subkingdom and Sino-Japanforest Subkingdom.Among different regions of Gansu,Gannan and Zhangye（Chilien） have 33 species in total,accounting for 89% of the total species;other regions like Jiuquan,Linxia,Longnan,Tianshui,Wuwei,Lanzhou,Dingxi and Baiyin are relatively fewer.Therefore,it is likely that the Gannan-Chilien region is the abundance center of Poa in Gansu.

关 键 词：甘肃 早熟禾属植物 种类 分布 

分 类 号：S543.019[农业科学—作物学]