Template-Type: ReDIF-Article 1.0 Author-Name: I. Vyhlídková Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: D. Palovčíková Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: M. Rybníček Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: P. Čermák Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: L. Jankovský Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Some aspects of alder decline along the Lužnice River Abstract: Alder decline along watercourses is one of the marked manifestations of tree decline in the Czech Republic. Local decline of alder trees is documented in the Czech Republic for about 15 years. The aim of this paper is to evaluate causes of alder decline and assess health conditions of other species of riparian stands at 2 localities on the medium reach of the Lužnice River. Effects were studied of abiotic and biotic stressors on the health condition of tree species. No fungal pathogen was found in tissues of declining alders which would be present in all trees and which could be considered to be the main causal agent of the decline. Even an occurrence of the causal agent of alder decline named alder-Phytophthora has not been proved. Tree-ring analyses demonstrated decreasing trends of an increment in alders; however, an abiotic or biotic factor showing direct effects on the fluctuation of tree ring dimensions has not been positively determined. A marked role in the alder decline is demonstrated particularly by abiotic factors accompanied by the secondary activation of some pathogens. Generally, the phenomenon can be named as polyetiologic decline. Keywords: Alnus, decline, tree-ring study, fungi, pathogens, environmental stress Journal: Journal of Forest Science Pages: 381-391 Volume: 51 Issue: 9 Year: 2005 DOI: 10.17221/4573-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4573-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200509-0001.txt Handle: RePEc:caa:jnljfs:v:51:y:2005:i:9:id:4573-JFS Template-Type: ReDIF-Article 1.0 Author-Name: P. Bulíř Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening Průhonice, Průhonice, Czech Republic Title: Impact of soil conditioners on the growth of European ash (Fraxinus excelsiorL.) on dumps Abstract: The effects of soil conditioners TerraCottem, Frisol, Bio-algeen and fertilisers Silvamix Forte and Cererit on the survival rate and growth of European ash seedlings until the stage called established plantation were observed on two experimental plots with different anthropogenic substrates. Eight-year experiments showed that under the given conditions the tested agents fulfilled the declared effects only partially. The application of TerraCottem was statistically insignificant both in the survival rate and in the growth. In the applied dose, Frisol manifested itself as an agent that may cause problems with the survival of plants, but at the same time also as a preparation improving the overall growth of young plants statistically significantly. Its effective dosage largely depends on the soil character. Bio-algeen had a very good effect on the survival rate of plants, but it did not surpass the control plants in the initial growth of plants. Silvamix Forte did not cause the mortality of seedlings and influenced the growth of plants statistically significantly for 1-3 years. In the applied dose, Cererit caused a high mortality of seedlings. The application of soil conditioners and Silvamix Forte did not markedly accelerate the growth and development until the stage of the established plantation. Until that time, the costs of the application of conditioners were higher by 4-13% as compared with the costs in the control plants. Keywords: TerraCottem, Frisol, Bio-algeen, Silvamix Forte, Cererit, European ash, soil conditioners, reclamations, dumps, anthropogenic substrates, survival rate and growth, costs Journal: Journal of Forest Science Pages: 392-402 Volume: 51 Issue: 9 Year: 2005 DOI: 10.17221/4574-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4574-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200509-0002.txt Handle: RePEc:caa:jnljfs:v:51:y:2005:i:9:id:4574-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Hrázský Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: P. Král Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Effects of the thickness of rotary-cut veneers on properties of plywood sheets. Part 1. Compressibility of plywood materials Abstract: The paper summarizes results of the institutional research aimed at the determination of compressibility or values of the reduction of thickness of compressed plywood sheets. Assessing the effect of thickness and thickness tolerances of veneers to a value of compressibility in relation to production parameters was carried out on the collection of plywood whole-beech sheets of the nominal veneer thickness of 1.5 mm. The plywood sheets were manufactured as seven-ply ones and urea-formaldehyde resin DUKOL S was used for their manufacture. Following characteristics were assessed: thickness differences, size of shrinkage, compressibility of veneers. Sheets were pressed using a pressure of 1.5 and 1.7 MPa. Values of changes in the thickness of veneers in pressed veneer sheets and coefficients of compressibility of particular properties were then statistically analyzed. Basic economic evaluation was carried out of the effect of compressibility on the amount of production costs. Keywords: plywood, modulus of elasticity in bending, bending strength, veneer, statistical analysis, compressibility, shrinking Journal: Journal of Forest Science Pages: 403-411 Volume: 51 Issue: 9 Year: 2005 DOI: 10.17221/4575-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4575-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200509-0003.txt Handle: RePEc:caa:jnljfs:v:51:y:2005:i:9:id:4575-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M. S. Iftekhar Author-Workplace-Name: Program Development Office - Integrated Coastal Zone Management Plan Project, Dhaka, Bangladesh Title: From timber management to forest management: an initial discussion on forest management evolution Abstract: Forests have been subject to human intervention since the inception of human civilization. With enhanced knowledge, understanding and capacity humans exert an increasing pressure and influence on forests. Forests in general have undergone different ownership patterns. The requirements for forests have changed over time. The objectives of forest management are shifting from timber production to biodiversity conservation and nature protection. On the other hand, in many places the forests are dwindling due to the anthropic pressure. The management paradigms are changing in response to these triggering mechanisms. In this paper an attempt has been made to summarize the evolution of forest management practices and discuss some recent trends in forest management. Keywords: biodiversity conservation, deforestation, forest management, forest ownership, silvicultural system, timber production Journal: Journal of Forest Science Pages: 412-429 Volume: 51 Issue: 9 Year: 2005 DOI: 10.17221/4576-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4576-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200509-0004.txt Handle: RePEc:caa:jnljfs:v:51:y:2005:i:9:id:4576-JFS