基于信息论的广州市木本绿化植物资源应用格局

The application patterns of woody green plants in Guangzhou based on information theory

采用点面相结合的调查方法对广州市木本绿化植物资源的种类、数量以及资源应用和原产地来源类型进行广泛调查,并运用Shannon信息论定量分析广州市木本绿化植物应用格局。结果表明:广州市现有木本绿化植物共2 512种;按原产地来源分类,10种不同来源类型植物的Shannon信息量大小排序为澳洲植物>北美温带植物>亚洲热带>西亚南欧地中海地区植物>非洲热带植物>亚洲温带地区植物>热带美洲植物>中国南亚热带、热带植物>中国温带亚热带植物>广东原产植物;按应用历史分类,3种不同应用类型植物的Shannon信息量大小排序为传统型>新近型>潜力型;外来木本绿化植物种类在广州市的绿化中布局较均匀,应用较广泛;广东省原产植物数量较大但多为潜力型,在广州市绿化中分布不均,应用较少;传统型木本绿化植物数量比潜力型木本绿化植物要少,但是应用更为广泛,分布均匀程度更高;广州市木本绿化植物具有类型多样、来源广泛的特点,但外来植物在城市绿化应用过多、乡土资源丰富而应用不足、有应用潜力植物数量多但没有投入规模应用。

By the combination of point survey and surface survey, the status of woody green plants in Guangzhou was investigated. On the basis of the investigation, the application patterns of woody green plants were researched by Shannon information theory. The results showed that the woody green plants in Guangzhou were total 2 512 species. The information volume of 10 kinds from different sources was in order of Australia plant 〉 North America temperate plant 〉 Asia tropical plant 〉 West Asia Southern Europe Mediterranean plant 〉 Africa tropical plant 〉 Asia temperate plant 〉 tropical American plant 〉 China subtropical-tropical plant 〉 China temperate-subtropical plant 〉 Guangdong native plant. And the information volume of 3 kinds from different application types was in order of traditional type 〉 recent type 〉 potential type. The exotic woody green plants in Guangzhou had more even distribution and extensive application. The native plants in Guangzhou were numerous but most were the type of potential, which were not applied as extensively as the exotic plants. The amount of traditional type was less than the potential type, but it had more extensive application and even distribution. The woody green plants in Guangzhou had abundant types and extensive resources, but the exotic plants of which were applied too much in urban afforestation, the native plants were abundant but not applied extensively, and the potential ~ype were numerous but applied on a very small scale.