Abstract
The changes in fine root biomass and necromass of Picea abies /L./ Karsten growing in damaged (Krušné hory Mts.) and undamaged (Šumava Mts.) stands were determined using a flotation method developed for the separation of fine roots. The total mass of living and dead roots was markedly decreased in the pollution-stressed plots and the concentrations of Co, Cu, Fe, Pb, and Zn in the roots were increased. Concentrations in dead roots were higher than those in living roots. The fine root biomass and necromass varied between 70–170 kg/ha and 920–1490 kg/ha respectively in the Krušné hory Mts. and 340–500 kg/ha and 7410–8770 kg/ha respectively in the Šumava Mts.
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