Báo cáo lâm nghiệp: " Dynamics of tree species composition and characteristics of available space utilization in the natural forest of the National Nature Reserve Hrončokovský Grúň" pot

... periodically.e utilization of productive growth space of the virgin forest by particular tree species and the share of the tree species in the total crown canopy in tree layers were calculated according ... mechanism, the trees of the previous generation are dying oﬀ, including ﬁr. Dynamics of diameter structure in natural forest To explain the mechanisms of tree species persis-tence during the observation ... 1995).As regards the tree species composition of the primeval forest in the National Nature Reserve (NNR) Hrončokovský Grúň, this primeval forest represents the culmination of tree species diversity...

Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt

... rutting and forest ﬂoor removal was evaluated on a skid trail in the natural forest of north of Iran. Combination of two levels of slope < 20% (SC1) and > 20% (SC2) and three levels of ... of the machine are lim-ited and accrued rutting and mixing of mineral soil with litter mass by the track grouser of this machine type. However, the large ground contact area of this machine ... practicable standards for sustainable forest produc-tivity in the United States. In: e Contribution of soil sci-ence to the development of and implementation of criteria and indicators of sustainable...

Báo cáo lâm nghiệp: "Dynamics of natural regeneration of even-aged beech (Fagus sylvatica L.) stands at different shelterwood densities" pot

... since beech represents 99.2% of the canopy individuals in the plots of the study, regardless of the existence of patches of other species in the surroundings of the area.e total number of ... 2007 and emerged at the border of the stands. In 2009, these species represented 2.6% of the total woody regeneration in the four PRP’s. is concurs with the proportion of species in the canopy, ... bučiny National Nature Reserve (NNR).MATERIALS AND METHODSe Voděradské bučiny National Nature Reserve was established in 1955 within an area of 658 ha. Most of the forest stands originated...

Báo cáo lâm nghiệp:" Dynamics of litterfall in a chronosequence of Douglas-fir (Pseudotsuga menziesii Franco) stands in the Beaujolais mounts (France)" potx

... the amount of K uptake bystands and originating from litterfall increased from 13 to 39%from the 20- to the 60-year-old stand. The contribution of litterfall to the stand nutrient uptakeincreased ... capable of estimating the mean residence time of C and elements in the forest floor [14, 35]. These calculationspresupposed that the forest floor was in a steady state, but thiswas not the main ... I.2.3. Stand characteristics A chronosequence of three stands aged 20, 40 and 60 years in 1992 were selected to study the dynamics of the ecosystem. Theirmain characteristics are presented in Table...

Báo cáo lâm nghiệp: "Leaf morphology as species indicator in seedlings of Quercus robur L. and Q. petraea (Matt.) Liebl.: modulation by irradiance and growth flush" potx

... A-B-C, °)AVEIN: mean of the vein angles of the six largest lobes (e.g. K-G-D, °)ASIN: mean of the sinus angles of the six largest lobes (e.g. I-J-K, °)ALOB: mean of the angles of the six largest ... Distribution of the 221 leaves according to the averageangle of auricles at the lamina base (AURI) and the lamina pilositydensity (LPD). The diagonal straight line is the discriminant line:2367 ... surrounding adult trees). For sun leaves of adult trees, the best features discriminating between the two species are pilosity development, presence of intercalaryveins, length of petiole and angle...

Báo cáo lâm nghiệp: "Dynamics of light interception, leaf area and biomass production in the establishment year in Populus clones" pot

... of the line sensor was randomly changed every weekamong permanent growth plots of the 4 clones.ResultsLight interception of the clones increasedthroughout the growing ... the highest value occurring in clone 11-11 (0.8 g-MJ-1) and the lowest in 111-5 (0.4 g’MJ-1). ). Dynamics of light interception,leaf area and biomass production in ... poplargenotypes in crown structure; in clones11-11 and 1-12, almost 50% of the totalleaf area consisted of leaves on branches,whereas in the other 2 clones, 44-136 and 111-5,...

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

... MMDadecreasedwithin the first half of a tree- ring; then it reached a plateau, and remained constant in the second half of the tree- ring (Fig. 2B).Correlations were high between the different morphomet-ric ... observed in this study that cell-wall surface and alsocell-wall thickness slightly decrease at the beginning and at the end of a tree- ring. Cell-wall thickness reduction at the end of a tree- ring ... Franco) because the wood density of this species is characterised by a strong inter- and intra -tree- ringheterogeneity [37]. Moreover, Douglas fir is of great interest in forestry as it combines strong...

Báo cáo lâm nghiệp: "Links between tree structure and functional leaf traits in the tropical forest tree Dicorynia guianensis Amshoff (Caesalpiniaceae)" ppsx

... reduction from the base to the uppermost part of the tree and an increasing degree of sexualization. Sexuality is characterisedby terminal inflorescences. The organisation of inflorescences and vegetative ... dimensions The number of nodes and the internode length per GUincreased significantly in understorey and clearing trees, untila threshold value corresponding to the onset of branching (i.e.ASD 3). The ... toreach it later and at a larger height. It is likely that the trees grow-ing in the clearing displayed a shorter phase of installation than the trees in the understorey. This further indicates that...

Báo cáo lâm nghiệp: " Non-indigenous plant species and their ecological range in Central European pine (Pinus sylvestris L.) forests" ppt

... (Carpinus betulus), and others (e.g.[42, 70]). This is reflected by the frequency of tree species (incl.spontaneous tree rejuvenation). In the stands of the Cladonio-Pinetum, Ledo-Pinetum, and ... DISCUSSION5.1. Few non-indigenous species in the forestsWith only about 5% of the total species pool of the analyseddata set, the number of recorded non-indigenous species in pineforests, which cover ... nutrient and water supply of the soil) of the non-indigenous species, which occur in pine forests. Addition-ally, human impact on the forests and forest sites is discussedwith regard to favouring the...

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

... M.P., The formation of dry zones in the sapwood of conifers. I. Induction of drying in standing trees and logs by Fomes annosus and extracts of infected wood, Eur. J. ... number of inoculationpoints, as a large increase of blue stain-ing was observed in the sapwood with anincreasing amount of inoculation points, ata density of 400 m-2. ... in each tree, and the visible length of the induced reaction zoneswas measured at the external side of the phloem.2.3. Decline assessmentBefore felling the trees, we...

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