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 unre...

Ngày tải lên: 07/08/2014, 03:22

... 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 com...

Ngày tải lên: 07/08/2014, 04:20

... activity in leaves and stems of EuCAD-uidA transformants, in vitro plants. (c) Comparison of stem transgene activity in 35S-uidA transformants, in vitro and greenhouse plants. (d) Comparison of stem ... control of the 35S promoter (a and c) and the EuCAD promoter (b and d). (a) Comparison of transgene activity in leaves and stems of 35S-uidA transformants, in vitro pla...

Ngày tải lên: 08/08/2014, 01:21

... of a freezing injury in the acid rain-treated conifer seedlings is discussed in Reinikainen and Huttunen (1989). Acknowledgments This work was supported by the Finnish Minis- try ... season’s growth and water relations of Picea sitchensis. New Phy- tol. 106, 237-250 Reinikainen J. & Huttunen S. (1989) The level of injury and needle ultra...

Ngày tải lên: 09/08/2014, 04:20

... 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 for...

Ngày tải lên: 07/08/2014, 03:22

... 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 Ent...

Ngày tải lên: 07/08/2014, 03:22

... nutrient-use efficiencies of the species involved. Plantation species of the genus Acacia, Pinus, Euca- Quantication 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 weigh...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 10:21

... 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...

Ngày tải lên: 07/08/2014, 10:21

... Part of the number of cuttings in which standards where maintained. Bold lines indicate the property limits. 3.2.4. Standards maintenance Depending on the woodlot, standards have been maintained over ... properties, management cannot be qualified as being “less sustainable”. Indeed the site’s native species are maintained and varied species of standards are in general left at the...

Ngày tải lên: 07/08/2014, 16:20