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猪苓是我国重要的中医药材,具有很高的药用价值。对猪苓的适宜分布区域进行研究,为确定其种植产区及合理规划生产布局提供科学依据。基于TM,ETM+影像、DEM数据,提取林地、海拔高程、坡度、坡向、气温、降水、土壤等影响猪苓生长发育的关键生态因子,利用GIS技术对四川省猪苓的生态适宜性进行分析,并结合野外实测数据进行验证。结果表明:四川省猪苓资源适宜性分布面积为276.214 4 km~2,主要分布在平武县、北川县、理县、盐源县、西昌市、德昌县、盐边县、米易县、会东县、攀枝花市等县市,适宜性分布面积占该区面积的0.143 3%;根据相关文献资料与野外实地调研,通过GIS技术分析所得结果与猪苓资源的实际分布地区较符合,说明基于遥感和GIS技术提取猪苓资源的适宜性分布区域是可行的。
Polyporus umbellatus is an important traditional Chinese medicine, which has high medicinal value. The suitable distribution area of Polyporus umbellatus was studied, which provided scientific basis for determining its planting area and rational planning and production layout. Based on TM, ETM + images and DEM data, the key ecological factors affecting the growth and development of Polyporus umbellatum were extracted from forest land, elevation, slope, aspect, temperature, precipitation and soil, and the ecological suitability of Polyporus umbellatus was analyzed by GIS , And combined with field data to verify. The results showed that the suitable distribution area of Polyporus umbellatus resources in Sichuan Province was 276.214 4 km ~ 2, mainly distributed in Pingwu, Beichuan, Li County, Yanyuan, Xichang, Dechang, Yanbian, Miyi , Huidong County, Panzhihua City and other counties and cities, and the area of suitability distribution accounted for 0.143 3% of the area. Based on the relevant literature and field survey, the results of GIS technology were in good agreement with the actual distribution areas of Polyporus umbellatus resources, Indicating that it is feasible to extract the appropriate distribution area of Polyporus umbellatus resources based on remote sensing and GIS technology.