王家沟流域林草植物的区系特征  

Floristic Characteristics of Plants in Wangjiagou Basin

作　　者：赵芹珍[1,2] 吴发启[1] 蔡继清 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]山西省水土保持科学研究所,山西太原033000

出　　处：《安徽农业科学》2012年第4期2191-2192,共2页Journal of Anhui Agricultural Sciences

基　　金：山西省水资源管理委员会资助项目(山西省泉域水资源保护研究项目)

摘　　要：王家沟流域共有林草植物241种,隶属于147属45科,其中蕨类植物1科1属2种,裸子植物2科6属7种,被子植物42科140属232种(双子叶植物39科107属182种,单子叶植物3科33属50种);以草本在流域植物生活型中占优势;小科属和单种属科较多,大科属较少;林草植物科属的区系地理成分复杂多样,科的分布区类型以世界分布为主(占总科数的51.11%);属的分布区类型以温带成分占优势(占总属数的51.02),其中北温带分布型优势明显;反映出该区系明显的温带性质。It is now known that there are 241 species of plants in Wangjiagou basin,which belongs to 147 genera of 45 families.Among them there are about 1 family,1 genera,2 species in Pteridophyte and 2 families,6 genera,7 species in Gymnospermae and 42 families,140 genera,232 species in Angiospermae（39 families,107 genera,182 species in Dicotyledoneae and 3 families,33 genera,50 species in Monocotyledoneae）.The herb has an advantage in the composition of life form of plants.The small families and genera and single genera have a larger quantity than the big ones.Analysis based on families and genera shows that floristic elements in the region are diversified,among which Cosmopolitan（accounting for 51.11% in total families） is dominant in the families;and temperate floristic elements（accounting for 51.02% in total genera） is dominant in genera,in which North temperate elements is the largest among the genera,which reflects the temperate characteristics of floristic elements in the basin.

关 键 词：王家沟流域 林草植物 区系特征 黄土丘陵沟壑区 

分 类 号：Q948.156[生物学—植物学]