关键词: 湖北黄精, 生态适宜性, 潜在分布区, Maxent, ArcGIS

Abstract: Based on the information of 219 distribution sites of Polygonatum zanlanscianense Pamp and 55 environmental ecological factors, the dominant environmental factors affectting the ecological suitability of Polygonatum zanlanscianense Pamp were screened and the suitable growing areas were divided using the maximum entropy model (Maxent model) and GIS (ArcGIS). The results showed that: Maxent model had high accuracy and reliability (AUC>0.9). So, the suitable ecological parameters of Polygonatum zanlanscianense Pamp predicted by this model were that: precipitation of 54~160 mm in April; precipitation of 94~133 mm in October; the average temperature in November was 3.2~13.2 ℃; precipitation of 119~233 mm in May; the temperature annual range was 25.6~33.7 ℃; standard deviation of seasonal variations in temperature was 71.55~80.17 ℃; the soiltype codes were 11 (calcaric cambisols), 96(fimic anthrosols), 104(leptosols), precipitation of 112~217 mm in June, precipitation of 100~191 mm in September. It was predicted that the most suitable distribution areas of Polygonatum zanlanscianense Pamp were Shaanxi, Hubei, Chongqing, etc., which could provide theoretical basis for the cultivation, utilization, and development of Polygonatum zanlanscianense Pamp.

Key words: Polygonatum zanlanscianense Pamp, ecological suitability, potential distribution, Maxent, ArcGIS