In the soil-vegetation systems in Hainan Island

more than 95% of the amounts of four elements （Cu

Zn

Cr

Mo） are stored in soil

less than 5% in vegetation and less than 1% in deciduous remain. For instance

the mountain yellow earthvegetation system

which both biomass and quantity of deciduous remain aee the largest within all soil-vegetation systems

storage of these elements is less than 5% in vegetation and less than 1% in deciduous remain. These elements are still less for iron laterite-vegetation system

which the biomass is relatively less

and theirstorage in vegetation is merely from n×10

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