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The Characteristics of Florstic Elements in the Middle of Yinshan Mountain and Jiufeng Mountain Reserve

FAN Yong-jun,YAN Wei,LAN Deng-ming(1.The Forest College of Agricultural University Inner Mongolia 010019;2.The Biology Science and Technological Department in Baotou Teacher' College Baotou Inner Mongolia 014030,China)  
The characteristics of compact of florstic elements were studied in Jiufeng Mountain reservation area in semi-arid steppe region.Based on the statistics and analysis at genera and species levels,and the comparison and the relation of the surrounding floras,the main results and conclusions are obtained as follows: The species diversity is relatively high.The 596 species of vascular plants,belong to 82 family and 302 genera have been recorded now in Jiufeng Mountain reservation area.The arid and semi-arid zone of florstic elements were represented by all plants,namely,most of plants centralize in a few of families and genera.The maximum family is Compositae,with 32 genera and 76 species,the next are Gramineae,Rosaceae and Leguminosae.The florstic diversity are complexity.The species of steppe florstic and east-Asia are the most rich.The mesophytes are the main water ecological types in Jiufeng Mountain reserve.
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