Effects of Intercropping Cunninghamia lanceolata in Tea Garden on Contents and Distribution of Heavy Metals in Soil and Tea Leaves

Effects of intercropping Cunninghamia lanceolata in tea gardens on contents and distribution of heavy metals in the soil and tea leaves were analyzed,through comparison study of a mono-cropping tea garden and an intercropping tea garden.Results show(1) contents of Pb,Ni,Mn and Zn decreased in the intercropping tea plantation,and the absorption capacity of Cunninghamia lanceolata varied from element to element,displaying an decreasing order of Mn>Ni>Pb>Zn;(2) concentrations of the heavy metals in the tea leaves of the intercropping tea garden were significantly lower than in the mono-cropping one.So intercropping of Cunninghamia lanceolata in tea gardens can significantly decrease contents of Pb,Ni,Mn and Zn and improve quality of the tea.