Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest badínsky prales"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 55 2009 11 502-510 Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales P. Jaloviar L. Bakosová S. Kucbel J. Vencurik Faculty of Forestry Technical University in Zvolen Zvolen Slovakia ABSTRACT The fine root biomass represents 3 372 kg ha in the intermediate stage of the beech virgin forest with different admixture of goat willow where the vast majority of this biomass is located in the uppermost mineral soil layer 0-10 cm. The variability of the fine root biomass calculated from 35 sample points represents approximately 90 of the mean value and reaches the highest value within the humus layer. The total fine root length investigated in 10 cm thick soil layers decreases with increasing soil depth. A significant linear relationship between the fine root length calculated per 1 cm thick soil layer and 1 m2 of stand area and the soil depth was confirmed although the correlation is rather weak. The number of root tips decreases with increasing soil depth faster than the root length. As the number of tips per 1 cm of root length remains in the finest diameter class without significant changes the reason is above all a decreased proportion of the finest root class diameter up to mm from the total fine root length within the particular soil layer. Keywords fine roots European beech goat willow Badin virgin forest root tips Rapid changes in the stand structures caused by abiotic factors belong to the natural components of the ecosystem development in a virgin forest. The comeback of the climax community to the given site follows the stage of pioneer and intermediate forest within the secondary succession. The stand structure of the intermediate forest is characterized particularly by the common occurrence of pioneer and climax tree species during this stage. Together with changes in the tree species composition in the stand successive accumulation of aboveground and underground biomass
