摘要
棘豆属的现代分布中心在中亚地区的天山、帕米尔－阿赖、巴尔哈斯台和阿尔泰一带，其次是在蒙古高原．在我国，本属植物新疆最多，西藏次之，内蒙古位居第三．内蒙古棘豆属植物主要分布于内蒙古草原区，以旱生植物占绝对优势（占７１．４％），不少种是各类草原的生态指示特征植物．本属植物在森林区有少量分布，在极端荒漠中几乎没有它们的分布．内蒙古棘豆属植物的区系地理成分以亚洲中部（中亚东部）成分为主，占总数的６４．３％，在内蒙古的西南部高山渗入了青藏高原成分，占１４．３％，东部和南部渗入了东亚成分，占７．２％，而且有阴山特有种２种，乌兰察布特有种４种，鄂尔多斯特有种１种，共计有７种为内蒙古所特有．这充分说明内蒙古棘豆属植物是以旱生的草原植物区系为主体，受东亚中生的森林植物区系和青藏高原高寒的植物区系的影响较弱．相对而言，内蒙古棘豆属植物同周边地区的联系，与华北和东北地区联系比较密切，与中西伯利亚和蒙古地区的联系次之，而与新疆和西藏地区的联系甚远．
It is believed that the mordern distribution center of Oxytropis is in Central Asian the belt of Tianshan、Paimirs Alai、Baerhasitai and Altai,and its secondary center is in Mongolia plateau.In China,the species of this genus distributes mainly in Xingjiang,secondarily in Tibet,third in NeiMonggol.The plants of Oxytropis mainly distribute in steppe region in NeiMonggol,the xeric plants dominate absolutely among them (accounted for about 71.4%),many species are characteristic plants with ecological indicating sigification for the index species of steppe.The plants of this genus distribute a little in forest region and hardly in extreme desert.In NeiMongol,the central Asia elements are the majority of the florisitc geographic elements of Oxytropis plants,making up 64.3%.The Qingzang plateau elements seep into the alpine plant in the southwest of NeiMongol,holding 14.3%,and the East Asia elements seep into the east and the southern region,holding 7.2%.Among these species,there are seven endemic species in NeiMongol,two Yinshan endemic species,four Wulanchabu endemic species,one Ordos endemic species.All of these show clearly that the xeric steppe flora is the majority of the plants of Oxytropis in NeiMonggol,the mesic forest flora of East Asia and the high altitude and cold elements of Qingzang plateau relatively has very little influence upon them.The plants of Oxytropis in NeiMonggol have some connection with its adjacent regions,Relatively speaking,they have more close connections with North China and Northeast China than with Central siberia and Mongolia,and the connection with Xingjang and Tibet is very little.The key to the plants of Oxytropis in NeiMongol has been recomposed,and the distribution maps have been drawn for every species.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1997年第2期200-212,共13页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金
关键词
棘豆属
植物区系
生态地理分布
内蒙古
Oxytropis floristic geographic elements ecological geographic distribution NeiMongol
