Abstract:The color，physicochemical properties，and nutritional components of orah mandarins from four producing areas（Wuming，Quanzhou，Guigang，and Jingxi）at different harvesting periods were analyzed.The results showed that the quality of orah mandarins varied depending on the producing area and harvesting period.With the extension of the harvesting period，the L*value，b*value，titrable acid，total phenol，and limonin contents of orah mandarins from four producing areas all showed a decreasing trend，while the a*value，soluble solids，solid-acid ratio，vitamin C，and carotenoid contents increased continuously，and the amino acid content showed a dynamic change trend.Cluster analysis showed that the orah mandarins at the harvesting period Ⅰfrom Wuming，Quanzhou，Guigang，and Jingxi were clustered into one group，and the orah mandarins at the harvesting periods II and Ⅲfrom Quanzhou and Guigang and those at the harvesting period II from Wuming and Jingxi belonged to one group.Moreover，the orah mandarins at the harvesting period Ⅲfrom Wuming and Jingxi fell into one group.The results of this study indicated that there was no difference in the quality of orah mandarins from Wuming，Quanzhou，Guigang，and Jingxi at harvesting periods Ⅰand Ⅱ.In addition，the quality of orah mandarins from Wuming and Jingxi at the harvesting period Ⅲwas better than that from Quanzhou and Guigang.The orah mandarins from Wuming and Jingxi at the harvest period Ⅲhad attractive color，moderate sweetness and sourness，and rich nutrition，with no bitterness，so they were more suitable for fresh eating and processing.