Báo cáo lâm nghiệp: "Biomass functions applicable to oak trees grown in Central-European forestry" doc

... biomass functions applicable to oak (Quercus robur, Quer- cus petraea) trees grown in the conditions of Central-European forestry. It is based on destructive measurements of 51 grown trees sampled ... 9.6% relative to the mean tree aboveground biomass of our oak sample set. A similar comparison of component functions ap- plicable to oak remains limited to the...

Ngày tải lên: 07/08/2014, 10:21

... e intensity of damage to individual tree species corresponds to the need of repair planting in plantations that were totally destroyed by rodents. In the case of beech it was necessary to ... feeding attractiveness (H, P 1992). Significant differences in the intensity of damage to trees at clearings were found in dependence on the structure of the herbaceous co...

Ngày tải lên: 07/08/2014, 03:22

... inorganic stores ought to be taken into mind discussing the interrelationships between the soil properties and the tree species. Differences among particular soil horizons e results of the testing ... Resources in Norway. Ås, Norwegian Institute of Land Inventory: 84. T B. (1977): Site index curves for Norway spruce. Med- delelser fra Norsk Institutt for Skogforskning, 33: 1–84. (...

Ngày tải lên: 07/08/2014, 03:22

... decreasing nitrogen content in the direction from individuals growing under crown to individuals growing in the open (Table 1, Fig. 1b). e trend corresponds to the findings published in literature ... however the difference in the DM content of the assimilatory organs, the weight of which was increas- ing with the increasing irradiance (Table 1). is cor- responds to the find...

Ngày tải lên: 07/08/2014, 10:22

... among the indicators of soil disturbances. e soil dysfunctions that are among the factors of forest decline (M 2003) cause that symptoms of decline appear both in natural and in managed ... silesiacae. e state of mountain forests in this area is dif- ferentiated in relation to terrain accessibility and division. Susceptibility of mountain forests to decline and die...

Ngày tải lên: 07/08/2014, 03:22

... criteria to determine r i must be to maintain the extent of habitat to sup- port certain population. By choosing the areas with a larger cone production to pass on to the next age class, the pine ... Montero G., Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in Spain, Ann. For. Sci. 60 (2003) 259–269. [5] Calama R., Modelo int...

Ngày tải lên: 07/08/2014, 16:20

... Osmotic adjustment in Pinus pinaster cuttings in response to a soil drying cycle, Ann. For. Sci. 59 (2002) 795–799. [36] Niinemets Ü., Role of foliar nitrogen in light harvesting and shade- tolerance ... different physiological mechanisms to withstand environmental condi- tions in sun and shade -grown seedlings. Osmotic and elastic adjustments are found to help cork oak seedl...

Ngày tải lên: 08/08/2014, 00:22

... test in Galicia (NW Spain) to determine the genetic variation among families and the possibility to include the resistance to this insect as a selection criteria in the Galician maritime pine ... previously found in P. pinaster in rela- tion to D. sylvestrella attack [14, 19] and to the infection by the fungus Melampsora pinitorqua [7, 8]. Kleinhentz et al. [19] also explain...

Ngày tải lên: 08/08/2014, 00:22

... Kyoto-pro- tocol [35]. It allows industrialised countries to account for the C stored following afforestation since 1990 in their budget of national greenhouse gases [13, 35]. Increasing C-storage in biomass, ... after ca. 50– 60% thinning (to 1 100 trees ha –1 ) the C-stock in ground veg- etation of L5 had increased again and there was a net gain of carbon in this compartment co...

Ngày tải lên: 08/08/2014, 00:22

... specimen inoculated with P. ostrea- tus, the combination of resin coating and edge painting did not lead to a significant improvement in the level of protection than the resin coating alone. According ... respect to the 50 ´ 50 mm mentioned in the reference standard, was selected in order to be able to determine the bonding quality by tension shear test complying with EN 314. Th...

Ngày tải lên: 08/08/2014, 01:21