Journal of Forest Science, 2007 (vol. 53), issue 3

Mineral nutrition in relation to the Norway spruce forest decline in the region Horny Spis (Northern Slovakia)

Ľ. Ditmarová, J. Kmeť, M. Ježík, J. Váľka

J. For. Sci., 2007, 53(3):93-100 | DOI: 10.17221/2148-JFS  

In this contribution we present the results of analyses of selected mineral nutrients in assimilatory tissues of spruce trees at different developmental phases (plants, adult trees) in the region Horný Spiš. The very close connection between mineral nutrient cycling and other physiological processes in the plants has been well recognised. The presented analyses of mineral nutrient cycling were done within comprehensive eco-physiological research assessing the physiology and health status of spruce stands in the study area. The research was conducted directly in the stand (Hliníky locality, Horný Spiš - two research plots: 1. plot with spruce stand...

Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands

P. Samec, D. Vavříček, P. Šimková, J. Pňáček

J. For. Sci., 2007, 53(3):101-112 | DOI: 10.17221/2173-JFS  

The soil is an irreplaceable component of forest ecosystems. Soil-forming processes directly influence element cycling (EC). Plant-soil interaction is a specific part of EC. Plant-soil interactions were observed on an example of natural spruce stand (NSS), semi-natural spruce stand (SNSS) and allochthonous spruce stand (ASS) in conditions of the spruce forest altitudinal zone (1,140-1,260 m a.s.l.; +3.0°C; 1,200 mm) of the Hrubý Jeseník Mts. (Czech Republic, Central Europe), where Norway spruce (Picea abies [L.] Karst.) is the main edificator and stand-forming tree species. We evaluated the soil properties of H- and Ep-horizons at selected sites...

The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations

I. Kupka

J. For. Sci., 2007, 53(3):113-118 | DOI: 10.17221/2147-JFS  

The root-plant ratio is one of the important parameters for planting stock quality. We suppose that the ratio is one of the driving variables for the growth performance of new plantation in the forest. The study summarises data on the volume of major parts of 4 years old wild cherry trees. An allometric analysis of different parts of plants in relation to the growth performance of wild cherry trees was done. The results show a close positive relationship between the volume of the whole root system and aboveground biomass. The same is true of the fine root proportion in the root system. Data also document that the efficiency of root system is not decreasing...

Analysis of some dynamic series of forest production and trends of forest economics in the Czech Republic

V. Kupčák

J. For. Sci., 2007, 53(3):119-128 | DOI: 10.17221/2172-JFS  

Functions of wood production in forestry are historically determined by felling possibilities of forest resources. Revenues from timber sales create a financial space for silvicultural operations thus providing for management continuity. These determinations have however recently shown a rather negative trend of development due to the development of timber prices on the one hand and due to increasing inputs on the other hand, last but not least also due to the projections of near-natural forest management methods and increasing area under special management regimes. In their synergy, all these factors lead to economic impacts reflected not only in...

Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood

V. Gryc, P. Horáček

J. For. Sci., 2007, 53(3):129-137 | DOI: 10.17221/2146-JFS  

The study was aimed to assess the integral value that determines wood properties - wood density at a moisture content of 0% and 12%. The wood density was researched in a sample tree with the presence of reaction compression wood. The density was determined for individual zones (CW, OW, SWL and SWR). The zone where compression wood (CW) is present has a higher density than the remaining zones. On the basis of the acquired data, 3D models were created for individual zones; they describe the variability of wood density along the stem radius and stem height. The influence of the radius seems to be a statistically highly significant factor. The wood density...