Nadziemna biomasa i roczna produkcja drzewostanów sosnowych Puszczy Niepołomickiej

The empirical material used in the studies took in measurement results. The measurements were carried out on 221 circular plots distributed systematically in an area of about 5826 hectares of stands in the Niepołomicka Forest where pine accounts for more than 50% of volume in the upper tree layer. The mean biomass of these stands is about 173 t·ha–1 of which 80.6% is pine biomass. The biomass volume and increment depend equally on stand age, habitat conditions and, in some age classes, the share of admixture species. The proportion of wood in biomass production markedly declines with stand age while that of the assimilatory apparatus increased.