Soil Cu²⁺ Adsorption under Different Types of Forests and Its Affecting Factors

Cu²⁺ adsorption of 24 soil samples gathered out of 4 soil layers（0—10、10—20、20—40、40—60 cm） of 6 different types of forests in Anji,Zhejiang were determined to explore relationship of Cu²⁺ adsorption with organic matter content,CEC,pH and particle composition.Results show that in terms of Cu²⁺ adsorption the six types of forests are in the order of broadleaved deciduous forest>shrubbery>tea grove>broadleaved evergreen forest>bamboo grove>pine forest.Cu²⁺ adsorption decreases with the depth of the profile.Organic matter content and CEC are the two major factors affecting soil Cu²⁺ adsorption.Based on the findings,a model is established to illuminate the relationship of Cu²⁺ adsorption with organic matter content and CEC.