Báo cáo lâm nghiệp: " A dendroecological reconstruction of disturbance in an old-growth Fagus-Abies forest in Slovenia" docx
Báo cáo lâm nghiệp: " Web-spinning sawflies of the genus Cephalcia Panzer (Hymenoptera, Pamphiliidae) in the Picea abies forests of the Beskidy Mountains (Poland)" pptx
... 63JOURNAL OF FOREST SCIENCE, 53, 2007 (Special Issue): 63–68 Web-spinning sawflies of the genus Cephalcia Panzer (Hymenoptera, Pamphiliidae) in the Picea abies forests of the Beskidy Mountains (Poland)M. ... importance.Keywords: web-spinning sawfly; Picea abies; Cephalcia; Beskidy Mountains; Polande increased level of the occurrence of web spinning sawflies associated with spruce in the Polish part of the Beskidy ... DFMMR), there are more than one thousand specimens of the genus Cephalcia, caught since the beginning of the eighties, mainly during periods of mass outbreaks in the Beskidy Mts. In the while,...
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Báo cáo lâm nghiệp: "A pheasantry as the habitat of small terrestrial mammals (Rodentia, Insectivora) in southern Moravia (Czech Republic)" doc
... study of the synusiae of small terrestrial mammals of pheasantries in southern Moravia is therefore aimed at monitoring the effect of specific properties of these habitats (high diversity of biotopes, ... supplementary food in the form of feeding for pheasants. Moreover, in the region of southern Moravia, pheasantries represent isolated areas of woody vegetation in the middle of intensive-ly managed ... fall was probably caused by changes in the water regime in floodplain forests after 1972 (Z 1991). e general decrease of Soricidae in southern Moravia during the last 40 years was obvi-ously...
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Báo cáo lâm nghiệp: " A contribution to the properties of combined plywood materials" ppsx
... is again a theme of another research inclusive of determination of the elastic constant according to separate layers.Appropriate tests to determine parameters men-tioned above will be the ... density of plywoods significantly a ects the capacity of the material to dampen noise. To achieve good sound-proof properties materials of a density of 630 kg/m3 are ordinarily used (e.g. Polyvan ... refraction of materials in the whole profile and also in separate layers was not examined. e failure of materials at separate layer interface ow-ing to shear in bending oneself partially approved....
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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx
... with a total area of 0.75 ha (Fig. 1) were mapped within the range of 22 individual beeches (their average spacing was about 16 m) on an area of 1.9 ha. Ap-proximately 40% of the stand area ... estima-tion of seed dispersal trees – an example of seed dispersal of Picea abies, Abies alba and Fagus sylvatica. Austrian Journal of Forest Science, 123: 103–120.M R., K A. (1998): ... (“unfenced” variant) and “Ansprung” (“tree4” variant) are respectively 350 and 400 m, with a maximum actual distance of 115 m and 254 m. G (2004) found out an ac-tual value of approximately 60...
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Báo cáo lâm nghiệp: "A contribution to the resistance of combined plywood materials to abrasion" potx
... of plywood is available. Plywoods differ in many factors.CONCLUSIONe aim of the paper was to propose the method-ology of testing the abrasion resistance of combined water-proof plywood materials ... aim of the paper was to propose the methodology of testing the abrasion resistance of combined water-proof plywood materials with the phenol-formaldehyde foil surface finish and to assess the ... surface of materials with glass fibre shows specific properties. Before the actual assessment of abrasion resistance, the methodology of testing the abrasion resistance of combined water-proof plywood...
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Báo cáo lâm nghiệp: "A survey of forest pollution with heavy metals in the Natural Forest Region (NFR) Moravskoslezské Beskydy with particular attention to Jablunkov Pass" docx
... be-tween the region of Jablunkov Pass and the rest of A survey of forest pollution with heavy metals in the Natural Forest Region (NFR) Moravskoslezské Beskydy with particular attention to Jablunkov ... detected in the area of the Jablunkov Pass in comparison with the remaining area of NFR. e spatial distinctness of distribution of this element in the Jablunkov Pass is confirmed in the forest ... distinctness of the area around the Jablunkov Pass is confirmed by the evaluation of the data of forest nutrition survey. Particularly, it consists in the high contents of phytotoxic heavy metals. ...
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Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx
... higher initial costs of mechanized harvesting machines, larger diameters and crowns of hardwoods, and the relatively steep terrain in Caspian forests, manual felling with a chainsaw is still ... a continuous time study on manual harvesting systems with a chainsaw model Stihl in a Caspian hardwood forest.(2) Estimate the production rates and costs of chain-saw felling. MATERIAL AND ... time-study data (B et al. 1986), which can be used for estimat-ing production rates and costs for similar thinning Productivity and cost of manual felling with a chainsaw in Caspian forests...
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Báo cáo lâm nghiệp: "A digital photographic method for 3D reconstruction of standing tree shape" ppt
... 1902. Measurement of standing tree shape by photographic method 635Figure 4. 3D reconstruction of the 70-year-old Norway spruce tree. Figure 5. Photographic method estimates of the local slope ... position of the standing trees. The disadvantages of this method are that a minimum of three targets per log must beattached to the stem of standing trees, and considerable timeis required for the ... Application of the method to measure 3D stemprofiles Reconstruction of the 3D stem profile of trees was undertakenthrough a series of field and laboratory measurements. In the field,a digital camera...
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Báo cáo lâm nghiệp: "Optimising the management of even-aged Pinus sylvestris L. stands in Galicia, north-western Spain" ppt
... thinningintensity depends on the number of the thinning, the intensityincreasing from the first thinning to the fourth. The intensity of the first thinning is around 20% of basal area, and in the ... (% of number of trees);◦ Percentage of low thinning (% of trees removed after system-atic thinning).– For the other thinnings◦ Number of years since the previous thinning;◦ Percentage of ... systematic thinning (% of number of trees);◦ Percentage of low thinning (% of trees removed after system-atic thinning).– For final felling◦ Number of years since the last thinning. The number of optimized...
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Báo cáo lâm nghiệp: " A dendroecological reconstruction of disturbance in an old-growth Fagus-Abies forest in Slovenia" docx
... dendroecological reconstruction of disturbance in an old-growth Fagus-Abies forest in SloveniaThomas A. Nagel a *,TomLevanicb,JurijDiaci a aUniversity of Ljubljana, Biotechnical Faculty, Department of ... depth can vary between 30 and 70 cm depend-ing on micro-topographic position. The climate is a combination of continental and Mediterranean, with an annual precipitation of ca.1400 mm and mean ... Disturbance history of an old-growth forest 897[28] Nagel T .A. , Svoboda M., Diaci J., Regeneration patterns after in- termediate wind disturbance in an old-growth Fagus-Abies forest in southeastern...
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Báo cáo lâm nghiệp: "Long-term evolution of understorey plant species composition after logging in chestnut coppice stands (Cevennes Mountains, southern France)" ppsx
... 9 plant species) . However, ten years after logging, species richness was always significantly higher than before the logging. Figure 2. Evolution of mean species richness after logging of a chestnut ... CONCLUDING REMARKS In our study, the temporary large increase of plant species richness observed especially after clear-cutting, but also after thinning, of chestnut coppice stand was not surprising. ... of the 22 years old chestnut coppice carried outduring the winter of 1992/1993 induced a drastic increase of plant species richness with 25 new plant species appearing. Species richness estimated...
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Báo cáo lâm nghiệp:"Optimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree models" potx
... 10.1051/forest:2003002Original articleOptimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree modelsMarc Palahía* and Timo Pukkalab a European Forest Institute, ... simulation-optimisation system, SPINE, for the management of Pinus sylvestris L. stands in Spain. The simulation sub-system is based on an individual-tree diameter growth model, a static individual-tree ... expectation value with 1, 2 and 3 percentdiscounting rate. Optimising the management of Scots pine stands in Spain 1072.1.3. Simulation of thinnings and regenerative cuttings The simulation sub-system...
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Báo cáo lâm nghiệp: "A dendroecological study in a declining coppice stand E Amorini M Biocca a" pdf
... correlated; March and April mini-mum temperatures, May and June maxi-mum temperatures, July and August maxi-mum temperatures are negatively correlated (table V). The same ... Original article A dendroecological study in a declining oak coppice stand E Amorini M Biocca a MC Manetti E Motta1 Istituto Sperimentale per la Selvicoltura, Viale S Margherita, ... parameters: rainfall, mean minimum andmaximum temperatures. All meteorological datarefer to the period 1968- 1992. The data of theyear 1989 were removed from the analysisbecause...
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Báo cáo lâm nghiệp: "A dendroclimatic analysis of Pinus densiflora from Mt. Chiri in southern Korea" ppt
... Original articleA dendroclimatic analysis of Pinus densiflora from Mt. Chiri in southern KoreaWon-Kyu Park*Ram R. Yadav*Department of Forest Products, College of Agriculture, ... (1801-1996) tree-ring chro-nology of Korean red pine was developed from the Chiri mountain range in south-ern Korea. Cross-dating of samplesrevealed that missing rings were rare; ... reconnaissances in southern Korea [25, 30] also indicated thepossibility of finding multi-century oldtrees in some of the high mountain areas.Though this area is very important from a...
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