Báo cáo lâm nghiệp: "Variability of cutting regimes in small private woodlots of south-western France" pot
Báo cáo lâm nghiệp: "Variability of cutting regimes in small private woodlots of south-western France" pot
... edge of P-1).The regeneration of the stands is always natural (shoot +seedling); no planting was identified in the woodlots studied.Clearing, thinning of seedlings, early thinning and pruningwere ... particu-larly concerning the density of the maintained standards, butwere often in the framework of a cordial relationship. Cutting regimes in small forest 927[20] Giudici F., Zingg A., Sprouting ability ... bequalified as being “less sustainable”. Indeed the site’s nativespecies are maintained and varied species of standards are in general left at the time of each cutting operation, which main-tains a balance...
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Báo cáo lâm nghiệp: "Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood" potx
... of rings from cambiumNumber of rings from cambiumNumber of rings from cambiumNumber of rings from cambiumHeight (m)Height (m)Height (m)Height (m)CWSWRSWLOWFig. 3. e in uence of ring ... proportion of pixels with compression wood in the entire image gave us the final result of the proportion of compression wood in the sample. e samples from the CW zone which contained min. 25% of ... (G, H 2004), and also by the increasing proportion of late-wood in the rings. Further, the thickness of tracheid cell walls, which grows with the increasing distance along the stem radius,...
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Báo cáo lâm nghiệp: "Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood" pdf
... parallel to grain, and also the level of the deformation of conifers, depends pre-dominantly on the interconnection of individual tra-cheids. e strength mainly depends on the S2 layer of the secondary ... proportion of lignin and the propor-tion of late wood. Compression strength of wood parallel to grain decreases with the degree of grain deflection from the longitudinal direction to 90°. Grain deflection ... 415–422 417 of wood were sawn out of the logs for individual zones (a block of CW – compression wood zone, CW/CW – a sample containing 25% of compres-sion wood at minimum, a block of OW – opposite...
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Báo cáo lâm nghiệp: "Regeneration and game damage in the Krušné hory Mts. assessed on the basis of National Forest Inventory of the Czech Republic" pps
... part. Peeling and brows-ing are classified into one category. During fraying trees are damaged by antlers of ungulate game.e assessment of peeling and browsing intensity was carried out in two ... browsing of terminal shoot, by fraying or by peeling and browsing by ungulate game. Peeling and brows-ing of trees with dbh 7–11.9 cm were related to the inventory circle with the radius of ... (damage of 67% indi-viduals in the open space, under shelterwood 13% of individuals). is was confirmed also by the investi-gation in the Fláje preserve; game were much more interested in beech individuals...
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Báo cáo lâm nghiệp: "Environmental risk assessment based on semi-quantitative analysis of forest management data" pptx
... Results of logistic regression, evaluating estimated in uence of searched factors to the critical damage oc-currence in all study regions. Signs of bi indicate whether increasing value of factors ... Corectness of classifi cation on independent data (Kysuce region, n = 286) 85.7%1% of removed timber stock in the forest compartment since the beginning of the analyzed period due to a salvage cuttings,M2 ... factors (according to scale in Table 1) in uence critical damage occurrence positively or negatively, increasing values of Wald statistic indicate the statistical weight of this in uence. Empty...
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Báo cáo lâm nghiệp: "Preliminary study on phloemogenesis in Norway spruce: influence of age and selected environmental factors" ppsx
... numbers of formed cells. The beginning of the longitudinal axial parenchyma formation was determined in young trees on May 14. In old trees this activity was seen a week later. The influence of ... the periodical sampling was performed in weekly intervals. In our research, the start of the formation of new early phloem cells was observed at the beginning of April. In Slovenia, new cells ... function of xylem tissues as a whole considerably. e conducting phloem of Pinaceae consists of living, mature sieve cells and various types of pa-renchyma cells. Within each growth increment,...
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Báo cáo lâm nghiệp: " Soil and plant communities development and ecological effectiveness of reclamation on a sand mine cast" ppt
... in initial soils in spoil banks following the mining of lignite may be con-nected with the participation of carbon of geological origin. Based on studies in a spoil bank in Piaseczno, W ... studies in Spain it was reported that the organic carbon content in upper horizons of initial soils was 3.0% already in the 5th year from the beginning of reclaims (V et al. 1993). In the ... initially higher content of organic matter in soil provided as a part of reclamation treatments, including green manure from lupine planting. In the ecosystem developing by way of natural succession,...
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Báo cáo lâm nghiệp: "ISSR and AFLP identification and genetic relationships of Chinese elite accessions from the genus Populus" ppt
... bolleanaP. bolleanaPopulus ChinaChinaChinaChinaChinaT1T2T3T4T5T6T7Xiaoyeyang-328Qinghaiqingyang-107Wutaiqingyang-77BeiJingqingyangMaoguoyang-309Zhongqing-10Zhongqing-48P. simoniiP. ... METHODS2.1. Plant materialsCuttings from a single ramet of each accession listed in Table Iwere planted in the collection of the Research Institute of Forestry atthe Chinese Academy of Forestry.2.2. ... ChinaChinaChinaChinaCanadaChinaChinaA1A2A3A4A5A6A7A8A9A10Jianadayang (Gu’an)Oumeiyang-107LiaoheyangLangfang-2GaiyangLiaoningyang (Fengning)Liaoningyang (Dalian)Liaoningyang...
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Báo cáo lâm nghiệp: " A state-space approach to stand growth modelling of European beech" pot
... procedures in which different classes of datawere left out based on different characteristics (i.e. site index,growth region, year of birth and thinning intensity) resulted in only a small increase in ... number of mea-surement occasions totalled 2065.The data included a wide range of different treatments in terms of initial spacing and thinning practices from unthinned control plots toheavily thinned ... plots. In the thinning experiments, the treatments in- cluded A-, B-, C-, and D-grade thinnings, and in some cases evenheavier thinnings. Usually, the D-grade is thinned to a basal area of 50%...
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Báo cáo lâm nghiệp: "Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon" docx
... layer of sand, clay and mixed rubble.Hardwood cuttings (25-cm long) were planted in a double-row de-sign with alternating inter-row distances of 0.75 m and 1.5 m, and aspacing of 0.9 m within ... be-cause of its rapid juvenile growth, high photosynthetic ca-pacity [5], and large woody biomass production in a singlegrowing season [6, 28, 29, 36]. The increasing interest in in-tensive ... result of the combined effects of irradiance and leaf aging, leaves at thebase of the stems being the oldest ones and age decreasingfrom the bottom to the top of the stem. The variations in SLAare...
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