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Konopka J.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2010

Development of forest utilization as a wood producer and a source of non-wood products is characterized. Special attention is paid to public beneficial (non-production) forest functions. Multifunctional (functionally integrated) forest management is defined. Current situation in its implementation and related barriers are given. They are particularly lack of finances in forest sector when almost 80% of revenues come from the sale of raw wood material. It is proposed to incorporate public beneficial forest functions to economic mechanism of the subjects managing forests and to secure these activities as properly paid services.


Vegetation index NDVI derived from satellite data MODIS (product MOD09) was used for monitoring of phenological phases of beech stands. The effect of leaves of upper story and undergrowth trees, understory vegetation, bark of thin and thick branches, trunk, and litter on NDVI value was identified and quantified for determination of the onset of phenological phases in five beech stands. The phenological observations were carried out in the spring 2011. Phenological curves were modelled for each stand. Inputs were NDVIsat derived from MODIS. The NDVI value for each component was determined from spectral analyses, and its percentage was estimated. Consequently, NDVImodel values were calculated for each stand and compared with NDVIsat. We found out that NDVIsat values are systematically biased from NDVImodel values a quotient q was established to revise this biased NDVIsat values. Possibilities for satellite long-term phenological monitoring resulted from the quantified effect of individual forest components on NDVI value. The 100% leaf onset is the most suitable phase for phenological monitoring of the canopy trees component. The 100% leaf budburst is suitable phenophase for monitoring of forest stands phenology.


The paper is aimed at enhancing the quality of information obtained from forest and land, particularly to identify and eliminate systematic bias of existing information and to correct and update them using a small-scale control sampling. Attention is drawn to the procedure known as ŽList Sampling". A digital forest of an area over 1600 ha was created, in which a correct as well biased (from -15 up to -25%) information on basal area of 257 stands are simulated. There are tested three ways of the sampling of control forest stands (simple systematic sampling, and PPS and PPP sampling). In the forest stands, the simulation of real basal area is done using the software STIPSI and the results are processed employing the adequate algorithm (Regression, Ratio, and PPS and PPP). Comparing the biased, revised and correct data, statistical as well as real confidence intervals for all the tested variants are derived and knowledge of their properties and conditions for its wider practical use is formulated.


Zauskova L.,Fakulta Prirodnych Vied Univerzity Mateja Bela | Midriak R.,Institute Vyskumu Krajiny A Regionov Centrum Vedy A Vyskumu UMB | Seben V.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2012

The contribution brings detail characteristics of the so-called white areas. It aims to describe white areas on the basis of selected attributes of agricultural land (such as typological-productive categories of agricultural land, potential level of cost-effectivness at crops growing, primary, secondary and other agricultural soil funds) and to compare these results with the results of procedures applied in the APVV project Waste lands and landscape abandoning in Slovakia as well as to highlight discrepancies in delimitation of both forest and agricultural soil fund. Nearly 80% of the Slovak white areas is situated on potential uneconomic agricultural soils, most of white areas (70%) is situated on the other agricultural soil fund and 25% of forests on non-forest land are not registered in the agricultural soil fund.


Moravcik M.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen | KolektiV J.K.A.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2012

This article presents formation of forestry (forest management) and characterizes the development of social requirements (governing structures) for forests and tasks that should be carried out by the industry. It focuses mainly on the development of forestry after the change of social system in 1989, especially in the last decade, during the global economic and financial crisis (starting in 2008). Current key issues of forestry in Slovakia will be identified based on the analysis. The paper presents their causes and consequences. It proposes goals and measures with aim to stabilize the situation by 2020 so as to ensure the accomplishment of the strategic goal of forestry in Slovakia (sustainable forest management based on an appropriate use of economic, ecological and social functions for the development of society, and especially rural areas).


The paper contains a proposal for sampling method of finding deadwood and its components (standing dead trees, stumps, coarse lying wood and small lying wood) in forest ecosystem whereas all parameters are given in volume unit (m3). It presents particular procedures for optimal sampling design, i.e. number, size and allocation of sample plots, for the technique of data obtaining in the field and for the methodology of data processing including determination of the frameworks for the accuracy of derived results. It brings several original methodologies and mensurational models. The paper presents also results of the verification of proposed procedures in forest practice and comparison of data on deadwood for Slovakia and some EU countries. Suggestions for objectification and generalization of the data on deadwood on domestic and international scale are formulated as well.


The paper is a contribution to the research on problems of thinning in mixed (spruce-fir-beech) stands situated in the 5th altitudinal vegetation zone (beech with fir) in the central part of Slovakia. The research was carried out on two series of permanent research plots established in 1972. Each of the series consists of three partial plots. Free crown thinning was used for tending one plot as a part of whole-area tending. On the second plot a non whole-area tending was realised and/or the third one was left without planned silvicultural treatment as control. At the turn of years 1993 and 1994 research plots were affected by snow break disaster. Dynamic changes of tree species composition, stand structure, qualitative and quantitative production including silvicultural analysis of eight thinning interventions were evaluated for the period of 34 years. Special attention was paid to the development of future crop trees, which are the main bearers of stand quality and quantity. The changes were compared with respect to differences between the plot with whole-area and non whole-area long-term silvicultural treatment and the control plot (without treatments). Preliminary results showed favourable development of tended plots despite the damage by snow in the past.


Konopka J.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen | Konopka B.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2011

This paper analyses the process of forest damage in Slovakia and its reasons. Special attention is paid to the analysis of temporal and spatial endangerment of forest ecosystems by harmful agents. Results on the zoning of ecological conditions for potential activity of harmful agents are shown, also conclusions concerning vulnerability of forest trees and stands in respect to growth stages are stated. Even though some attention was paid to this scientific field in the 60s and 80s, the information from this period related to the climatic change effect of the forest ecosystems, although its interactions with harmful agents were not known or yet relevant. The newest findings show how climate change effects forest ecosystems and how their endangerment by harmful agents is brought about. Consequently, original strategies and concepts for new research activities are suggested. In fact, future studies would relate to detailed analysis concerning temporal and spatial endangerment of forest trees and stands from harmful agents under climate change conditions. Moreover, this proposal is concerned with the range of main forest protection issues, undamentally based on the biological control of biotic pests. Finally, further studies would elucidate the conditions which underlie success or efficiency of certain pest control procedures.


Kovalik M.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2011

This paper presents the results of a valuation study on the efficiency of forest land management. The non-parametric approach-Data envelopment analysis (DEA) was applied in this study. The results obtained show average efficiency in the range of 70-93% (depending on the model). There was low dependency (the differences in efficiency were not statistically significant) among efficiency on the one hand and on the other hand the other model did not include variables (such as forest enterprise size, ownership, share of coniferous species). The results of the DEA were compared to results of Cost Benefit analysis. It can be stated, that DEA represents a promising alternative to performance measurements using other methods and approaches.


Konopka J.,Narodne Lesnicke Centrum Lesnicky Vyskumny Ustav Zvolen
Forestry Journal | Year: 2011

Current situation in economy as well as in science and research in Slovakia is characterized. An overview of proposals for the adoption of measures to improve the situation is presented. Elaborated measures form a document entitled "Strategy of the Development of Slovak Society". Parts of "Programme declaration of the government of the Slovak Republic for the years 2010-2014" are characterized. They deal with science and innovations as well as with measures for ensuring the declaration. Special attention is paid to current situation in research and development in agrarian sector and rural development. A critical situation is demonstrated. At the same time proposals for solving are given, especially how to ensure improving the transfer of the latest knowledge of research and development to agrarian practice.

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