Abstract: We analyzed the correlation between meteorological factors and the yield of Codonopsis pilosula based on the climate data from 1981 to 2018 of 16 national meteorological stations in southeastern Shanxi. Four factors were selected as the eco-climatic zoning indices, including ≥10 ℃ accumulated temperature and precipitation during the whole growth period, average temperature during root growth period, and precipitation during seedling period. The DEM and soil texture were selected as geographic environmental impact indices. The spatial analysis model of each index was established. These indices were calculated in 90 m×90 m fine-grid. Comprehensive evaluation index of eco-climatic suitability of C. pilosula was constructed based on the evaluation of each index calculated by the membership function and the weight coefficient determined by the entropy weight method. Climatic suitable planting division of C. pilosula in southeastern Shanxi was carried out. The results showed that the suitable area is mainly distributed in the Taihang Mountain in the east part of southeastern Shanxi, Taiyue Mountain in the west, and the junction of Taiyue Mountain and Zhongtiao Mountain in the southwest of Jincheng, with good matches of light, temperature and water resources. The subsuitable area is mainly distributed in the transitional shallow hilly areas from Taihang Mountain and Taiyue Mountain to Shangdang Basin and Jincheng Basin, with adequate heat but relative limiting precipitation. The unsuitable area is mainly distributed in the central areas of Shangdang Basin and Jincheng Basin, with low altitude and high temperature in summer. Our results can provide a reference for the optimized ecological layout of C. pilosula in southeastern Shanxi and the scientific and rational use of climate resources.

Key words: southeastern Shanxi, Codonopsis pilosula, eco-climate suitability, zoning.