The purpose of master's thesis was to estimate dry biomass of above ground herbaceous and shrub vegetation in spruce stands in Pokljuka with direct method: cutting, drying and weighing plants and to investigate how herbaceous and shrub biomass is dependent from several stand and site factors. Results showed that average dry biomass of above ground vegetation in herbal layer amounted to 8.1 g/m2, if this average includes dry biomass of shrubs in shrub layer it amounted to 12.6 g/m2. When above ground dry biomass of woody plants weighed less than 130 g/m2 it did not affect above ground dry biomass of herbaceous plants, when above ground dry biomass of woody plants weighted more than 130 g/m2 it did have negative effect on above ground dry biomass of herbal plants. Multiple linear regression model demonstrated that dry biomass of above ground herbal and shrub vegetation depended on association, tree height, canopy cover and exposition, meanwhile it did not depend on the rockiness, altitude, slope, basal area and growing stock. We presented linear and nonlinear regression models that demonstrated the relationship between dry biomass of morphological plant groups in herbal layer: grasses, herbs, low shrubs and ferns and cover, height and phytovolume of mentioned groups. Sample error of above ground biomass in herbal layer estimation was less than 20 % when biomass was measured on more than 382 plots measuring one square meter.
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