Abstract: In this paper, the ecological suitability of olive in Sichuan Province was evaluated, based on GIS-fuzzy comprehensive evaluation method. A comprehensive consideration was taken on the climatic, soil, and topographic factors related to olive growth. The spatial data of the factors were organized and computed
 with GIS method; the weights of the factors were derived by using AHP method; and the proper membership function and fuzzy arithmetic operators were selected to conduct the comprehensive ecological suitability evaluation. There was a general consistency between the results yielded by GIS-fuzzy comprehensive evaluation method and the actual distribution of olive plantations. Compared with traditional evaluation methods, the GIS-fuzzy comprehensive evaluation method had the advantages of short-term, more fine and detailed, and more suitable for small spatial scale areas.

Key words: Lanthanum, Membrane permeability, Root exudate, Nutrient content