Abstract: Quantitative classification (CA) and ordination (PCA,COA) methods were used to analyze 23 traits of seven Gordonia acuminata geographic populations, and discriminate function analysis (SDA) was used to test the results of classification and ordination. Seven geographic populations were classified into three climatic ecological types: type Ⅰ Yunnan Wenshan, typeⅡ Guangxi, and type Ⅲ Shichuan. According to the discriminate axis figures of SDA, no position points were incorrectly classified. Through comparing the contribution rate of the geo climatic factors to each ecological type, sunlight had the principal effect on the formation and differentiation of the three climatic ecotypes.

Key words: Gordonia acuminata, Multivariate analysis, Climatic ecotype, Geographic population, water consumption characteristic, overwintering stage, supplemental irrigation by measuring soil moisture, winter wheat, PAR interception and utilization