Journal of Forest Science, 2005 (vol. 51), Special Issue

Development of hybrid fir clonal materialOriginal Paper

J. Kobliha, V. Janeček

J. For. Sci., 2005, 51(20):3-12 | DOI: 10.17221/11842-JFS  

There are four testing plots with hybrid clonal material. This material is regularly measured and some characteristics are observed. This paper sumarizes results of measurements from years 1998, 2000 and 2002. Hybrid material is compared with control material Abies alba from open pollination. Results show, that hybrid clonal material grow orthotropically and most of them are better in growth characteristics in comparison with control material Abies alba from open pollination. Mortality is also very low. All this mean high potential of this material to the future not only for further breeding, but also for use in special plantations.

Object-oriented approach in requirement engineering for the analysis of information systemsOriginal Paper

V. Merunka

J. For. Sci., 2005, 51(20):13-18 | DOI: 10.17221/11843-JFS  

One of the major issues of all analysis techniques in information engineering is to capture the intelligible description of processes in the modeled problem. This need is very significant for information systems supporting modern industries and also information systems related to the agriculture and hydrology. In this area, process modeling forms the basis of Business Process Reengineering as a pre-step for subsequent information system analysis, design and implementation. It provides an essential tool to enable software developers, consultants and business users to collaborate to ensure that the necessary understanding of the business context is available...

Notes on invasive and expansive trees and shrubsOriginal Paper

J. Möllerová

J. For. Sci., 2005, 51(20):19-23 | DOI: 10.17221/11844-JFS  

Expansion and invasion of plants indicate successful colonization and competitive abilities of species. There are fewer invasive and expansive woody plants than herbs. Main expansive (native species) trees and shrubs are Acer platanoides, Acer pseudoplatanus, Clematis vitalba, Crataegus sp. div., Fraxinus excelsior, Prunus spinosa, Rubus sp. div., Sambucus nigra. Main invasive (alien species) are Acer negundo, Ailanthus altissima, Amorpha fruticosa, Cytisus scoparius, Fraxinus pennsylvanica, Lycium barbarum, Mahonia aquifolium, Physocarpus opulifolius, Pinus strobus, Populus × canadensis, Prunus serotina, Quercus rubra, Rhus typhina, Robinia pseudoacacia,...

Vegetation of the Nature Reserve Voskop (Protected Landscape Area Český kras) and possible trends of its developmentOriginal Paper

J. Möllerová, J. Viewegh

J. For. Sci., 2005, 51(20):24-26 | DOI: 10.17221/11845-JFS  

Nine plots on transect situated through the ridge of Nature Reserve (NR) Voskop (Protected Landscape Area Český kras) demonstrate local vegetation variability. Ordinations with some transformation phytosociological relevés showed possible development trends.

Comparison of humus form state in the beech and spruce parts of the Žákova hora National Nature ReserveOriginal Paper

V. V. Podrázský, J. Viewegh

J. For. Sci., 2005, 51(20):29-37 | DOI: 10.17221/11846-JFS  

The paper summarises main ideas concerning the structure of natural forest ecosystems at middle altitudes and documents the changes of humus forms and their chemistry in the natural forest of Žákova hora National Nature Reserve, in typical selected parts with different tree species composition: European beech - Norway spruce. The species composition, age and spatial structure are discussed and analysis of the uppermost soil layer is done in particular parts of the natural forest regeneration cycle, of different stages respectively. We compared the amount and layer composition of surface humus and basic pedochemical characteristics of holorganic and...

Green alder effects on the forest soils in higher elevationsOriginal Paper

V. V. Podrázský, I. Ulbrichová, I. Kuneš, J. Folk

J. For. Sci., 2005, 51(20):38-42 | DOI: 10.17221/11847-JFS  

Presented study documents the effects of green alder (Alnus alnobetula [Ehrh.] C. Koch) on the uppermost forest soil layers in mountain areas, respectively in the top part of the Orlické hory Mts. Three variants effect to the forest soil have been studied: pure groups of green alder, pure groups of Norway spruce and Norway spruce stand under-planted by green alder. The effect of alder stands litter influenced some basic soil characteristics: the surface humus accumulation (low), the bases content and base saturation (decreased). The green alder increased the acidification trends in the forest soils of the humus forms on the studied locality and intensified...

Application of Mg-fertilizers to prevent and to decrease Norway spruce yellowingOriginal Paper

V. V. Podrázský, S. Vacek, J. Remeš, I. Ulbrichová

J. For. Sci., 2005, 51(20):43-48 | DOI: 10.17221/11848-JFS  

Yellowing of the Norway spruce is a relatively common problem in many areas of the Czech Republic. In some of them, it is also connected with forest decline; it was studied in the Šumava (Bohemian Forest) Mts. and in the western part of the Krušné hory Mts. This unfavourable phenomenon is initiated by several ecological as well as anthropic processes, one of the most important being the imbalance of forest stand nutrition. Particular reasons lead to the deficiency of nutrients, especially of magnesium. Solution of this undesirable trend is the profound ecological analysis and cause-oriented treatments. Besides lowering the air pollutant input, fertilization...

Fertilization of Norway spruce plantations on the bulldozer-spread windrows in the Ore Mts.Original Paper

J. Remeš, V. V. Podrázský, I. Ulbrichová, V. Meduna

J. For. Sci., 2005, 51(20):49-53 | DOI: 10.17221/11849-JFS  

The spreading of bulldozer-formed windrows represents a second stage of the site restoration with bulldozers utilization in the Ore Mts. In the first period, bulldozers were used to create windrows for mechanized reforestation of immission-declined stands, causing profound devastation of forest sites, because removed surface humus was the only source of nutrients and environment for tree species roots. Preparatory stands have been established, and have to undergo re-construction in the coming years. Nowadays, the windrows are spread by the bulldozers again, covering 1/3 f the whole area between windrows by the rest of holorganic matter. This...

Soil forming role of birch in the Ore Mts.Original Paper

I. Ulbrichová, V. V. Podrázský, M. Slodičák

J. For. Sci., 2005, 51(20):54-58 | DOI: 10.17221/11850-JFS  

Large areas were deforested as a consequence of the immission calamity in the Czech Republic in the last decades. As a part of restoration activities, preparatory species were utilized, both planted and sown, to cover forest soils, to prevent soil erosion and to regenerate forest microclimate, necessary for reintroduction of target, climax species. Birch (especially Betula pendula Roth.) was among the mostly common preparatory species. Presented paper documents the effects of birch in the case of its cultivation on an intact soil. In this case, birch was documented as a species suitable in a short-time perspective, improving soil characteristics and...