金沙江干热河谷的资源植物及开发途径初探

金沙江干热河谷是金沙江流域具有特殊生态景观的一类地区，她如同生物地理学中的“岛屿”现象一样存在，与附近地区比较其最显著的环境特点是高温、低湿。对金沙江干热河谷中资源植物的种类、数量及用途，它们分布的多样性，开发利用的前景和途径进行了初步的研究。金沙江干热河谷虽然气候干燥，植物的种类组成极具特点，河谷所具有的充沛热量为分布于热带、亚热带的资源植物的生长提供了条件，当地１００４种种子植物中有记载的资源植物数量为５８５种，资源植物的数量和所占植物的比例都较大，特别一些热带才具有的资源植物在当地能大量分布，有些已经成为商品，为这些地区的开发提供了基础和条件。野生资源植物的多度作为衡量当地植物数量的一个比较级定性指标可以反映当地植物的多少状况，为资源植物的开发利用提供了数量依据。

Reource Plants and There Developmcnt Ways In Jinsha River Dry-Hot Valley

Drv-hot vallev is one of the geological landscape unit existed alongthe drainage area of great rivers in southeast China, mainlv is scattered in the upperreaches of Yangtze River,which is called Jinsha River.The ecological condition of thedry-hot valley is different from the near areas.Rich in sunshine and heat,poor in mois-ture content is the main climate characteristics of the dry-hot valley.The converge rate offorest and other vegetation in this area is very small; but the plant species,especiallysome useful plant species are rich in the area because of the rich heat and sunshine. 1004species are recorded in this area and 585 of them are used by local people,which are calledresource plants. 9 different types of usage are classified, among them 377 species aremedical plants which is the largest type. The vegetation method is used to estimate thequantity of the species,that is useful for the development of the plant resources in thearea,At the end,3 different ways are put forward for the development of the plant re-sources in the dry-hot valley,that is very important to the sustainable development andecological protection of the area.