Abstract:In order to clarify the absorption and accumulation characteristics of copper, zinc and iron microelements in Camellia oleifera, their contents and annual changes in C. oleifera ‘Changlin 4’ at five-year-old were studied. The results showed that the content of iron in Camellia oleifera was the highest, following by zinc and copper. The annual absorption of zinc and copper per individual reached 62.97 mg and 22.60 mg, respectively, with the ratio of 3:1. The absorption of zinc per individual reached 40.18 mg from fruit development to ripening stage, accounting for 63.81% of annual uptake. The absorption of copper per individual reached 20.04 mg from shooting to fruit ripening stage, accounting for 88.67% of annual uptake. The copper and zinc stored in roots supplied 30.25% and 57.90% of the need for tree growth from dormancy to shooting stage. The absorption period of iron focused on the shooting to fruit development stage, about 0.34 g per tree. These could provide theory basis for scientific fertilization of Camellia oleifera.
