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目的:借助地理信息系统(GTS)研究何首乌在中国的地理分布以及分布区的生境特征,为何首乌资源的保护和人工栽培提供参考。方法:建立何首乌分布区数据库,在ArcGIS9.3软件中制作何首乌分布区的县界多边形电子地图,结合中国地貌、土壤和植被图运用多边形叠加分析的方法提取何首乌分布区的地貌、土壤和植被类型。采用频数分布统计法研究何首乌分布区的气候特征。结果:何首乌资源分布区有90%的县市的年平均气温在13～22℃,有85%的县市的年均日照时数在1100～2300h,77%的县市的年均降水量在800～1600mm;66%的面积处于2000m以下的中低海拔地区,土壤以红壤、黄壤为主,植被类型主要是灌丛和矮林。结论:借助GIS技术进行何首乌生态环境特征分析,方便快捷、可靠,可为何首乌资源的保护和人工栽培提供参考。
Objective: To study the geographical distribution of Polygonum multiflorum in China and the characteristics of habitat in the distribution area by means of Geographic Information System (GTS), and to provide a reference for the conservation and artificial cultivation of Radix Polygonum multiflorum. Methods: The database of Polygonum multiflorum was established. The polygon map of Polygonum multiflorum in the distribution area of Polygonum multiflorum was created by ArcGIS 9.3 software. The topography, soil and vegetation types of Polygonum multiflorum were extracted by using polygon analysis of Chinese landscape, soil and vegetation map . Study on Climatic Characteristics of Polygonum multiflorum Thunb Distribution by Frequency Distribution Statistics. Results: 90% of the resources distribution area of Polygonum multiflorum resources annual average temperature in 13 ~ 22 ℃, 85% of counties and cities in the average annual sunshine hours in 1100 ~ 2300h, 77% of the counties in the average annual rainfall in 800 ~ 1600mm; 66% of the area is in the middle and low altitude areas below 2000m. The soil is dominated by red soil and yellow soil, and the vegetation types are mainly shrubs and dwarf forests. Conclusion: It is convenient, quick and reliable to analyze the characteristics of eco-environment of Polygonum multiflorum with GIS technology, and provide reference for the conservation and artificial cultivation of Polygonum multiflori.