湖南城步野生藤本植物资源及开发利用研究

为深入研究湖南城步野生藤本植物资源现状,更好地开发利用其野生藤本植物资源,通过野外实地调查、标本鉴定和查证相结合的方法,对湖南城步野生藤本植物资源进行了统计与分析。结果表明,城步共有野生藤本植物40科88属277种,其中蕨类植物和裸子植物较贫乏,分别只有2科2属2种和1科1属1种,占该区域野生藤本植物总种数的0.72%和0.36%;被子植物有37科85属274种,其中双子叶植物具有明显的优势,有33科80属245种,占该区域藤本植物总种数的88.45%;单子叶植物处于次要地位,仅有4科5属29种,只占该区域藤本植物总种数的10.47%。在科属构成中,科的构成比较集中,属的构成相对分散。藤本植物的生活型以高位芽植物为主导,占总种数的81.59%;而地下芽、一年生、地上芽和地面芽植物所占比例较少,分别占总种数的8.66%,4.69%,2.89%和2.17%,并且以缠绕类藤本占优势,缠绕类、搭靠类、卷曲类和吸固类分别占总种数的46.21%,24.55%,21.30%和7.94%。分布区类型以热带地理成分为主,有52属,占总属的59.09%;温带成分占有较大比例,有29属,占总属的32.95%,其中以泛热带性地理分布居首位,其次为东亚分布,说明该区系带有热带和温带双重性,并且有热带成分向温带渗透和过渡的性质。同时,湖南城步野生藤本植物资源开发利用潜力巨大,应加强对其野生藤本植物资源的保护力度,积极拓展开发利用途径,扩大应用面,提高对城步野生藤本植物资源的综合开发水平。

Investigation of wild vine resources in Chengbu,Hunan

This study investigates wild vine resources in Chengbu County (Hunan Province),with a view to im-proving their exploration and utilization.We have analyzed the species composition and diversity of wild vines using the methods of field investigation,specimen identification and literature survey.There are 40 families, 88 genera,and 277 species of wild vine in Chengbu,of which very few are ferns and gymnosperms.Only 2 families,2 genera and 2 species of pteridophyte and only 1 family,1 genera and 1 species of gymnosperm were found,accounting respectively for 0.72% and 0.36% of the total number of vine species in the region.There are 37 families,85 genera and 274 species of angiosperms,most of which are dicotyledonous plants,which in-clude 33 families,80 genera and 245 species,accounting for 88.45% of the total.Monocotyledonous plants are in the subordinate position,with only 4 families,5 genera and 29 species,accounting for 10.47% of the total. As regards family and genus hierarchy,the family structure is relatively concentrated while the genus structure is relatively decentralized.In terms of life-form,phanerophyte vines outnumber others,accounting for 81.59%of the total.Minority forms include underground buds,therophytes,chamaephytes and hemicryptophytes,ac-
counting for 8.66%,4.69%,2.89% and 2.17% of the total respectively.In terms of climbing style,the ma-jority are twining vines,accounting for 46.21% of the total,while the minority styles include hooking,curling and adhering vines,accounting for 24.55%,21.30% and 7.94% respectively.In terms of floristic composi-tion,the vines are mainly tropical plants,with their 52 genera accounting for 59.09% of the total.Temperate-zone plants constitute a reasonably large proportion,making up 29 genera and 32.95% of the total.As pan-tropic plants dominate,East-Asian elements are secondary.There is a duality and transition between tropical and temperate elements.Chengbu is rich in wild vine resources with great potential for utilization.Efforts should be made to strengthen the protection and exploration of these resources.