| Based on the relationship between the climate factors and the yield, the index of climatic demarcation for on the production of medlar (Lycium barbarum L.) was confirmated and calculated. By using DIS, this article divides Ningxia into three climate zones for the production of medlar, i.e., the adaptable zone, the sub-adaptable zone and the unadaptable zone. In addition, some rational suggestions and measures are brought forward to improve the development of medlar. |