In order to provide scientific guidance for the application of copper fertilizers and pesticides，the study carried out effective copper content analyses based on 60 samples of the leaves and roots respectively of different varieties and ages，as well as 46 surface soil samples within a series of citrus orchards in northern Guangxi.The results showed that the copper contents of leaves were highly uneven，ranging from 3.5 to 72.3 mg/kg with an average of 7.90.And that of roots，without excess as well as shortage，was relatively rich with an average of 19.83 mg/kg.The effective copper contents of the soils were at high levels ranging between 0.80 and 22.41 mg/kg with an average of 6.37 mg/kg，and was significantly positively correlated with that of the plants.Also found that the effective copper contents of the plow layer soils were significantly posi- tively correlated with their parent materials，the pH values and organic matter content of the soils;Soil and plant copper content of copper was significantly positively correlated.