湖南桃源老祖岩国家石漠公园种子植物资源调查

Investigation on seed plant resources in Laozuyan National Hamada Park in Taoyuan County in Hunan Province

老祖岩国家石漠公园植物资源丰富,为全面摸清该区其植物种类,采用路线调查和查阅相关资料文献相结合的方法,对湖南省桃源县老祖岩国家石漠公园种子植物资源进行了实地调查。结果表明:该研究区共有维管束植物173科532属880种,除去人工栽培种,共有野生种子植物137科475属806种,其中野生被子植物135科473属803种。区系分析表明:属级水平上热带成分(43.81%)与温带成分(44.40%)的比例相当,而科的水平上热带成分(45.26%)明显高于温带成分(21.90%),说明该区的中亚热带性质较明显,这与其地理位置处在中亚热带向北亚热带的过渡区是相一致的。以上均表明该区种子植物区系成分不但复杂多样,而且还具有过渡区域的特点;保护区内的湖南特有树种和珍稀濒危植物也很丰富,具有很大的保护价值。

Laozuyan National Hamada Park is rich in plant resources.In order to make a comprehensive understanding of the plant species,the study carried out a field survey on the seed plant resources of Laozuyan National Hamada Park in Taoyuan County in Hunan province by means of route investigation and literature reference.The results showed that there were 880 species of vascular plants in 173 families,532 genera.Excluding cultivated species,there were 806 species of wild seed plants in 137 families,475 genera,among which 803 species in 135 families,473 genera were angiosperms.Floristic analysis showed that the proportion of tropical components at the level of genus(43.81%)was similar to that of temperate components(44.40%),while the proportion of tropical components at the level of family(45.26%)was significantly higher than that of temperate components(21.90%),indicating that the middle subtropical nature of this area was obvious,which was consistent with its geographical location in the transition zone from middle subtropical to north subtropical.All the above indicated that the floristic composition of the seed plants in this region was complex and diverse,and had the characteristics of transitional region.The special species of Hunan Province and the rare and endangered plants were also abundant and of great protection value.