Báo cáo lâm nghiệp:" Variation in the decay resistance and its relationship with other wood characteristics in old Scots pines" ppsx

Báo cáo lâm nghiệp: "Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in Southern Moravia (Czech Republic)" pot

... 6215648902.Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in Southern Moravia (Czech Republic)J. SFaculty of Forestry and Wood Technology, ... found in southern Moravian forests as exerted by the bank vole gnawing the stems of young trees. In controlled forests 40% of young oak plantings were damaged to some extent after winter 2004–2005 ... types of low altitude forests (e.g. Z 1973). In all of them Cg is one of the dominant species. In our study we concentrated on the study of the population of this species as also some other...

Báo cáo lâm nghiệp: "Analysis of the production potential of raw wood in the forests of Slovakia" pps

... 2003 SP 26 028 OC 04 Modiﬁcation of Utility Properties of Wood Materials and Extension their Using.Analysis of the production potential of raw wood in the forests of SlovakiaR. P, J. MNational ... in the area dis-tribution of age classes occurred mainly due to the realization of regeneration felling, including salvage felling in the stands of lower age classes. Dynamic changes in the ... country. In the Slovakia considerable attention has been paid to the issues of wood production and regulation of its felling. Permanent forest monitoring, mainly of the growing stock in forest...

Báo cáo lâm nghiệp: "Perception of the forest by the villagers of the Salonga National Park in the Democratic Republic of Congo" doc

... COMMUNICATIONPerception of the forest by the villagers of the Salonga National Park in the Democratic Republic of CongoJ. M. IFaculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry ... Proposal of a sustainable management of the Salonga National Park in the Democratic Republic of Congo. [Ph.D. esis.] Brno, MUAF: 127.IBESOA J.M., 2009. Use of the forest products by the native ... appear to be the harvesting of fuelwood areas. Management of these forests with the main objective of maintaining the production of all non-wood for-est products currently utilized by local users...

Báo cáo lâm nghiệp: "Evaluation of the growth and health status of selected clone mixtures in comparison with ordinary planting stock" docx

... in the framework of long-term programmes using the clonal propagation (J et al. 1994); their re-Evaluation of the growth and health status of selected clone mixtures in comparison with ... exposed locations where their observation continues and their growth and health status are compared with the ordinary planting stock of generative origin. e objective of these experiments is ... both the individuals with intensive growth dynamics and the slow-growing individuals were selected for a subsequent mixture of clones). After their growing in a nursery they were outplanted in...

Báo cáo lâm nghiệp: "Contribution to the knowledge of Apodemus sylvaticus populations in forests of the managed landscape of southern Moravia (Czech Republic)" potx

... respect to damage to forest stands. In the present paper, the population dynamics of As is described in larger forest complexes of southern Moravia depending on the biotope and food supply including ... (Apodemus sylvaticus) . Journal of Zoology (London), 198: 83–102.SUCHOMEL J., 2007. Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in ... reached the higher winter population abundance than in the other two forests (Fig. 1). It also showed higher litter sizes in spring and summer. However, populations in all forests declined during...

Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot

... Republic, Project No. 2B06068, and the Research Intention of ISBE AS CR, Project No. AV0Z60870520.Inﬂuence of stand density, thinning and elevated CO2 on stem wood density of spruceI. T1, ... cultivation. Stand density of two subvariants (s – sparse with ca 5,000 trees/ha and d – dense with ca 10,000 trees/ha) and thinning impact (intensity of 27%) on SWD and its variation along the stem ... Average stem wood density in elevated (E) and ambient (A) concentration of CO2 and sparse (s) and dense (d) subvariant independent from vertical stem proﬁle; (a) 2002, i.e. after 6 years of the...

Báo cáo lâm nghiệp: "Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and fresh mixed forest sites" pdf

... zone rings of early and late wood are contained, the Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and fresh mixed forest ... classes in age class IV in fresh mixed coniferous forest (A) and fresh mixed forest (B) sitesFig. 9. A comparison of characteristics of the size of ring conducting area (CAar) in Kraft’s classes in ... in Kraft’s classes in age class III in fresh mixed coniferous forest (A) and fresh mixed forest (B) sitesFig. 8. A comparison of characteristics of the size of ring conducting area (CAar) in...

Báo cáo lâm nghiệp: "Analysis of the accuracy of GPS Trimble Juno ST measurement in the conditions of forest canopy" pot

... Brno, in the vicinity of the Brno Dam, and the second area (area B) was situated northeast of Brno, on the southern border of the for-est ground belonging to the Křtiny Training Forest Enterprise ... for testing the aforementioned GPS JUNO ST, as the accuracy quoted by the manufacturer is 1 to 5 m after post-process correction.Table 1. List of testing pointsPoint No. Forest stand type ... consider the largest obstacle of GPS measuring in a forest stand – adverse geomorpho-logical conditions, then the measurement is signiﬁ-cantly in uenced especially by the structure and age of the...

Báo cáo lâm nghiệp: "Rationalization of the performance of a mobile off-road system working in the forest environment with respect to its emission load" doc

... suitable machinery, and in using acceptable methods for the employment of machines with the rational performance. Pos-sibilities to determine the rational performance of machines are further ... of reaching its design performance have to be considered.Possibilities of increasing the design performance of forest systems:– Increased material ﬂow range By increasing the number of working ... extending the cross sections within roads where the material is transported;– By increasing the maximum working capacity (performance) .Determination of the optimum regime of the logging and...

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: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx

... University of Cracow.Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)J. S1, ... estimation of variation of the tree form factor for all data within individual provenances was done in several stages. Since the values of the tree form factor most often depend on the tree size, ... results of the analysis of the relationship between the stem form of larch of the tested prov-enances and the index of stand density, obtained dur-ing this study, were not expected. Although there...

Báo cáo lâm nghiệp: " Variation of the photosynthetic capacity across a chronosequence of maritime pine correlates with needle phosphorus concentration" pptx

... explained by the higher values of photosynthetic capacity and intermediate level of stomatal conductance meas-ured in the trees of this stand. Leaf nitrogen concentration on an area basis appeared ... likely the main cause of the changesin photosynthetic capacity observed among maritime pine stands. Having acknowledged that the differential fertilisation of the stands composing the chronosequence ... demonstrated that crown heightdid not influence Vcmax and Jmax in maritime pine trees. The lack of variation in photosynthetic parameters was due to the weak attenuation of light with canopy...

Báo cáo lâm nghiệp:" Variation in the decay resistance and its relationship with other wood characteristics in old Scots pines" ppsx

... properties of the wood, and thusquantify the importance of the individual factors contributingto the natural durability of Scots pine wood. The variation in the in vitro decay rate, and in the extractive ... that the mass loss in the periphery part of the heartwood was lowerthan that in the centre of the heartwood. The other marked dif-ference between the outer and the inner heartwood found in the ... the same in the inner and outer heartwood, and thus could not have contributed to the significant variation in the mass loss observed between the inner and outer heartwood. The variation in the...

Báo cáo lâm nghiệp: "Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and variation with heartwood age" ppt

... Original article Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and ... identification of nine of these 12 ellagitannins (fig 1). Purifiedsamples of vescalagin, castalagin, grandinin and roburin A (kindly provided by Dr Scalbert, INRA,Paris) allowed ... relating the total soluble ellagitannins and heartwood age was calculated. In a second study two heartwood samples were taken from each of 20 oak trees (Q roburand Q petraea)...

Báo cáo lâm nghiệp: "Variation of stomatal resistance with leaf age in Quercus petraea: effect on the soil-water balance of an oak forest" pot

... after the leaf area index(Nizinski and Saugier, 1988; 1989a, b).We thus decided to study the effect of leaf age on stomatal resistance and on the morphology of the leaf ... ma-ture oak forest. Agric. For. Meteorol. in press ...

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