Forest management in regions affected by long-term acidification, nutrient degradation and eutrophication of forest soilsMinistry of Environment, Czech RepublicIFER - Institute of Forest Ecosystem Research, Jílové u Prahy, Czech Republic
----------------------------------Czech University of Agriculture, Prague
Institute of Landscape Ecology, Czech Academy of Sciences, České Budějovice
Administration of the Protected Landscape Areas of Jizerské Hory, Liberec
2002 - 2004
The goal of the project VaV/620/1/02 was to evaluate the current state of the forest stands in Jizerske hory Mts., and suggest the basic forest management principles that would stabilize the forest ecosystems in the area. The project was conducted in a collaboration of five research teams. It included the Institute of Forest Ecosystem Research (IFER), which also acted as the project coordinator, the Czech Geological Survey, the Faculty of Forestry and Environment of the Czech University of Agriculture, Prague, the Institute of Landscape Ecology of the Czech Academy of Sciences.
The project identified the urgent measures needed for strengthening the stability of forest ecosystems and their restoration. Among the most urgent belong i) strong tending measures to improve stability of young spruce stands ii) change of tree species composition supporting the soil-improving and reinforcing species and iii) successive conversion of stands composed of substitute tree species during tending and by planting the target species. It is necessary to reduce the game stock pressure on regenerating and planted trees.
The project developed a method for objective determination of the most urgent forest stands requiring some management measures. This method is based on the current stand condition, age structure and species composition. At the same time, the method accounts for the soil disturbance by acidification and nutrient degradation. The project concludes that large-scale liming cannot be recommended in the area, mostly because of ecological risks indicated by unfavorable C/N ratio and/or the absence of proper tree cover. The local direct fertilization can be applied as a temporary measure to improve nutrient balance, but not as a long-term solution to cope with the unstable forest stands in the area.