景谷试验示范林场种子植物区系分析

Analysis of Seed Plant Flora in Jinggu Experimental Demonstration Forest Farm

植物区系可以反映自然地理环境的变迁,为植被生态学以及植物引种驯化提供基础资料。通过对景谷县试验示范林种子植物的组成、分布区类型及区系特征等进行分析。结果表明:景谷试验示范林场共记载野生种子植物148科573属949种,其中,裸子植物5科6属7种;被子植物143科567属942种。该区植物区系具有明显的热带性质,属于热带北缘性质,且表现出热带向亚热带过渡趋势。种子植物区系属于古热带植物区马来亚植物亚区的滇、缅、泰地区。中国特有种分析表明,该区域特有种有126个,占总物种的13.28%,主要起源是滇南小区和我国西南地区。

Flora can reflect the changes of natural geographical environment and provide basic information for vegetation ecology and plant introduction and domestication.The composition,distribution types and floristic characteristics of seed plants in experimental demonstration forest in Jinggu County were analyzed.The results are as following:there are 949 species in 573 genera of 148 families(among them 7 species in 6 genera of 5 families belonging to Gymnospermae and 942 species in 567 genera of 143 families belonging to Angiosperms)in the region.The flora of this area has obvious tropical nature,which belongs to the northern margin of the tropics,and shows the transition trend from tropical to subtropical.The seed flora belongs to Yunnan,Burma and Thailand of the Malayan plant subregion of the palaeotropical flora.The analysis of endemic species in China showed that there were 126 endemic species in this region,accounting for 13.28%of the total species,which mainly originated from the southern Yunnan region and southwest China.