Báo cáo lâm nghiệp: "Development of species composition in long term simulations with an individual-tree growth simulator" pps
Báo cáo lâm nghiệp: "Development of species composition in long term simulations with an individual-tree growth simulator" pps
... only species showing economical importance, the ANFI sub-sumed maple species. A generally small amount of maple in the species composition had been expected and is plausible because of intolerance ... for mortality with increasing dbh for the other tree species, result-ing in large trees never dying. erefore the results of the long term simulations became unreliable. us, in this study, ... b4 and b5 of the Norway spruce model have been used also for the other tree species to get the expected U-shaped mortality rate over dbh.Ingrowth modelIngrowth in terms of ANFI means...
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Báo cáo lâm nghiệp: "Development of tertiary roads in the Lednice-Valtice Cultural Landscape" pps
... methodology and principles of forest opening-up in respect of sustainable development. is methodology and principles in combination with design principles of rural roads and in accordance with function-ally ... composition of forest stands. In the period 193x–2000 more than 90% of forest stands were classified into class III. e change in the tree species composition of forest stands was a result of forest ... fundamen-tals of opening-up, in accordance with functionally integrated management in the landscape.The above-mentioned aims practically mean to quantify indicators of the tertiary road network in the...
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Báo cáo lâm nghiệp:"Stability of transgene expression in poplar: A model forest tree species" ppsx
... activity in leaves and stems of EuCAD-uidA transformants, in vitro plants. (c) Comparison of stem transgene activity in 35S-uidAtransformants, in vitro and greenhouse plants. (d) Comparison of stem ... control of the 35S promoter (a and c) and the EuCADpromoter (b and d). (a) Comparison of transgene activity in leaves and stems of 35S-uidA transformants, in vitro plants. (b) Comparison of transgene ... 50% of transgenic lines (both constructs) showonly a single band on Southern autoradiograms, but the highintensity of some of these bands may indicate the insertion of several transgenes in tandem...
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Báo cáo lâm nghiệp: "development of winter hardiness of pine and spruce seedlings in a simulated acid rain experimen" potx
... of a freezing injury in the acidrain-treated conifer seedlings is discussed in Reinikainen and Huttunen (1989).AcknowledgmentsThis work was supported by the Finnish Minis-try ... season’s growth andwater relations of Picea sitchensis. New Phy-tol. 106, 237-250Reinikainen J. & Huttunen S. (1989) The level of injury and needle ultrastructure of acid ... acid rain-irrigated pine and spruce seedlings after lowtemperature treatment. New Phytol. 112, 29-39earlier than the southernmost seedlings,whereas in pine seedlings no...
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Báo cáo lâm nghiệp: "Utilization of digital photogrammetry in forestry mapping" docx
... them to use in many forestry disciplines (mostly for determination of the health conditions of forests stands, ), in combination with the remote sensing of the Earth and GIS (Geographic Information ... the beginning of the 90’s, forestry mapping changed from the analogue making of the maps with thematic forestry themes into a system, the output of which is a digital forestry map. Financial ... points. For the accuracy determination of stereo interpretation the coordinates of well identified points (features) on the aerial image and terrain were used. e co-ordinates of these points...
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Báo cáo lâm nghiệp: "Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration" ppsx
... stand shelter. e parent stand 441D10 is one of the oldest and most productive stands of Douglas fir in mixture with our domestic tree species that can be found in the area of the Training ... po-tential and ecological stability of mixed forest stands in uplands – III. A single tree mixed stand with Douglas fir on an eutrophic site of the Křtiny Training Forest Enterprise. Journal of Forest ... 209–217 209JOURNAL OF FOREST SCIENCE, 56, 2010 (5): 209–217Importance and possibilities of tree species introductionIntroduced tree species could take an important place in sustainable multifunction...
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Báo cáo lâm nghiệp: " Quantification of nutrient content in the aboveground biomass of teak plantation in a tropical dry deciduous forest of Udaipur, Indi" pdf
... nutrient-use efficiencies of the species involved. Plantation species of the genus Acacia, Pinus, Euca-Quantication of nutrient content in the aboveground biomass of teak plantation in a tropical dry ... temperatures ranging from 65 to 75°C, until a constant weight was attained. Finally, samples were weighed with an analytical balance in order to obtain dry weight (d.w). e samples were ground in the ... 251JOURNAL OF FOREST SCIENCE, 55, 2009 (6): 251–256Tectona grandis is considered to be an important tree species in Rajasthan forest, in the western parts of India. e total area with this species...
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Báo cáo lâm nghiệp: "Transformation of solar radiation in Norway spruce stands into produced biomass – the effect of stand density" doc
... comparison of its annual values between FD and FS plots during the investigated years (Fig.6). Realized thinning, i.e. modification of the spatial arrangement of individual trees within the stand, ... is very of- ten explained by latitudinal variation in intercepted PAR. e values of e obtained for the investigated spruce stand are in the range of published reports. e differences in e values ... decrease in the efficiency of solar energy conversion into biomass due to a prevail-ing amount of the shade type of foliage with high maintenance costs.The importance of the amount of leaf area and...
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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
... the radius of a circle to the beginning of early wood,R – the radius of a circle to the beginning of late wood,P – earlywood area in annual ring.Total area of early wood rings within the sapwood ... access to light, thus resulting in an inadequate stimulation of the increase in conducting area. In the opinion of J (2004) a characteristic trait of stand growth and development processes ... value than dominant trees. Probably the trees, taking the position of co-dominant trees at the time of felling, existed earlier in the stand as predominant or domi-nant trees, losing the position...
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Báo cáo lâm nghiệp: "Variability of cutting regimes in small private woodlots of south-western France" pot
... Part of the number of cuttings in which standards wheremaintained. Bold lines indicate the property limits.3.2.4. Standards maintenanceDepending on the woodlot, standards have been maintainedover ... properties, management cannot bequalified as being “less sustainable”. Indeed the site’s native species are maintained and varied species of standards are in general left at the time of each cutting operation, ... that of coppice with standards, with small-scale cutting operations and min-imal intervention. None of the owners had any contacts with the forestry office technicians, their link with the professionbeing...
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