Báo cáo lâm nghiệp:"Poplar plywood resistance to wood decay agents: efficacy of some protective treatments in the light of the standard ENV 12038" ppt

... 83–89© INRA, EDP Sciences, 2003DOI: 10.1051/forest: 2002077Original articlePoplar pl ywood resistance to wood decay agents: efficacy of some protective treatments in the light of the standard ENV ... time.Analyzing the different plywood protections, the combination of resin coating and edge painting did not lead to a significantimprovement in the level of mass loss than the resin coatingalone. ... panelproducts made of or containing wood. ENV 12038 Durability of wood and wood- based products – Wood- basedpanels – Method for determining the resistance against wood- destroying basidiomycetes. To access...

Báo cáo lâm nghiệp: "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" potx

... Diﬀerences in the properties of the particular sampling points and the fact that the in uence of soil heterogeneity on the speciﬁcity of forest stand cannot be fully neglected complicate the interpretation ... connection of roots with the soil as well as with the other tissues of the plant is related to soil water-holding capacity and to the potential of ion exchange reactions. In case that the neutralisation ... used to evaluate the close-ness of the nutrient status of the spruce stands and to assess the closeness of chemical properties of the studied sites. e results were tested by PCA. To test the...

Báo cáo lâm nghiệp: "Rodent-caused damage to forest trees from the viewpoint of forestry practice" potx

... 1992).Signiﬁcant diﬀerences in the intensity of damage to trees at clearings were found in dependence on the structure of the herbaceous cover. According to foresters, the clearings free of ground vegetation ... dynamics of rodents in forest environment, their feeding behaviour and the damage they cause. At the beginning of the research, we conducted a survey among foresters in the form of a questionnaire ... appears mainly in the winter season, typically only at some localities and in some years (B et al. 2005). In spite of the fact that sometimes the activity of rodents leads to total destruction...

Báo cáo lâm nghiệp: "Biomass functions applicable to oak trees grown in Central-European forestry" doc

... e information on tree biomass is required to assess the amount of carbon held in trees, which in turn represents the basis of the assessment of carbon stock held in forests. is leads to the ... three parameters of the equation. However, it is to note that in allometric studies the nonlinear regression analysis is often avoided using the logarithmic linearization of the power functions, ... equation including only a single independent variable D. H usually helped to explain the variation of logarithmically transformed variable by additional 0.5 to 1% (Table 3). In terms of the mean...

Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf

... the height of the tree at the end (H2) and at the be-ginning (H1) of the five year period, as well as the differencebetween the age at the end of the period (T2) and the age at the beginning ... for the estimated age. The distribution of the age of the dominant strata and the site index within the for-est area can be seen in Figure 4. The classification of the forestarea in function of ... years. If the aim is the conservation of some protected or rare species, the criteria to determine rimust be to maintain the extent of habitat to sup-port certain population.By choosing the areas...

Báo cáo lâm nghiệp: "Using past growth to improve individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain" doc

... basalarea (G) of the living pines in the inventory plots using the initial ver-sion of the diameter growth models (A), using the new version of the diameter growth models (B). In each case, the fixed ... (thin lines indicate the standard error of the mean).Figure 2. Measured and predicted 10-year changes in the tree basalarea (g) of living P. sylvestris in the inventory plots: using the initialversion ... The predicted 10-year change in tree and stand basal area of the living pines (i.e., pines that were notthinned and did not die) in the inventory plots was compared to the measured change. To...

Báo cáo lâm nghiệp: "Ecophysiological factors contributing to the distributions of several Quercus species in the intermountain west" docx

... 1966; Maze, 1968). The focus of this paper is to examineaspects of the water relations of these threeoak species native to the intermountain westand of their hybrids under ... in the Cottam Oak Grove at the Uni-versity of Utah for approximately 30 years,and during that interval some of the lowestwinter and spring air temperatures of the previous ... early morning peak, leaf conductances to water vapor remained very low through the remainder of the day. In contrast, Q gambelii and the hybrids were able to maintain high...

Báo cáo lâm nghiệp: " Scots pine responses to number and density of inoculation points with Leptographium wingfieldii Morelet, a bark beetle-associated fungus" docx

... density of inoc-ulation points [30].When inoculated into the bole of Scotspine (Pinus sylvestris), the fungus Lep-tographium wingfieldii, associated with the bark beetle Tomicus ... and susceptibility to L. wing-fieldii.A last but interesting result of our studylies in the stability of the length of the induced reaction zone in the phloem,which ... independence between the responsesobserved in the phloem and the spread of the fungus in the sapwood. The slight cor-relation found between this parameter and the total...

Báo cáo lâm nghiệp: "Linking intra-tree-ring wood density variations and tracheid anatomical characteristics in Douglas ﬁr (Pseudotsuga menziesii (Mirb.) Franco)" pot

... characteristics independently, in order to evaluate their relative in uences on wood density. For the firstset of simulations, all the variables in the model were fixed to values they take at the beginning of ... variance. The conversion factor of MMDa to CWP (with the interceptset to 0) was 1. The ratio between CWP and MMDadecreasedwithin the first half of a tree-ring; then it reached a plateau, andremained ... reduction in radial direction. Simulations also showed that the knowledge of tracheid anatomicalcharacteristics is not sufficient to fully explain wood density decrease at the beginning of earlywood.wood...

Báo cáo lâm nghiệp: "Designing decision support tools for Mediterranean forest ecosystems management: a case study in Portugal" pptx

... encompasses the defini-tion of both the debarking cycle for each tree in the land unit and the thinning regime. The prescription simulator may consider threedebarking models. The inputs to the first ... extending the planning horizon will not impact the effectiveness of this decision support tool. The interpretation of inventory data demonstrated the effec-tiveness of the linkage between the ... both the minimum and the maximum number of years of a land unit debark-ing cycle and the timing of the first debarking for each land unit. In order to run this model the prescription simulator interprets...

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