Abstract:  In order to clarify the effect of different mineral elements level on growth of Camellia oleifera seedlings， the hydroponics culture system for Camellia oleifera seedlings was established and the leaves number， SPAD value， biomass， root ratio and mineral elements content were determined. The results showed that both the mineral elements deficiency and overdoes could affect the root growth and biomass accumulation apparently. The K（-） treatment influenced the seedlings growth apparently and dramatically decreased the biomass and SPAD value. And the imbalance of P nutrition decreased the rootshoot ratio （21.06%） and root ratio （17.40%） significantly. The dry matter accumulation of stems and leaves were mainly affected by Mn and Zn nutrition. The Mn（-） treated seedlings showed the lowest stems ratio (21.23%) and the Zn（-） treated seedlings showed the lowest leaves ratio (36.58%). In addition， the deficiency or overdose of macroelements N, P, K not only affected the macroelements absorption but also influenced the microelements absorption including Mg， Zn， Mn and B. And the deficiency of Mn and Zn restrained the absorption of N， P and K. Overall， the balancing fertilization of macroelements N， P， K and microelements Mn and Zn should be taken seriously during cultivation of Camellia oleifera seedlings.

Key words: Camellia oleifera, hydroponics culture, macroelements, microelements