Báo cáo lâm nghiệp: "Regeneration of forest stands on permanent research plots in the Krkonoše Mts" pdf

... Scotch pine, silver birch and other tree species of different age and size. Within the forest cycle the Fig. 8. e natural layering of beech in the ecotone of the upper forest limit in the Krkonoše ... results showing aggregation of regeneration on PRP 37. CONCLUSIONS e presented results confirm high potential of natural regeneration on permanent resear...

Ngày tải lên: 07/08/2014, 10:21

... ability in higher elevations and tolerates conditions in the ecotone of the up- per forest limit, although its optimal growth and production is reached in the conditions of the 5 th and 6 th forest ... spruce. CONCLUSIONS  e presented research on structure and develop- ment of forest stands in national parks of Krkonoše Mts. describes the stand...

Ngày tải lên: 07/08/2014, 10:21

... optimizing the forest ecosystem management in national parks of the Krkonoše Mts. the horizontal structure of forest stands was exactly evaluated on 38 permanent re- search plots, both in juvenile ... (natural seeding, advance growth, plantations) and in the tree layer. MATERIAL AND METHOD Description of permanent research plots In the territory o...

Ngày tải lên: 07/08/2014, 10:21

... METHODS Description of permanent research plots Similarly like in the evaluation of the condition and development of soils the condition and develop- ment of health status of forest stands were evaluated in ... described on the basis of evaluation of transition matrices describing the probability of a change in the assess- ment of defoliation...

Ngày tải lên: 07/08/2014, 10:21

... to the consumption of seed reserves. Thus, the kinetic of changes in dry weight and in nitrogen content of both the cotyledons and the growing plant, was established prior to the analysis of the ... to the respective controls. Interestingly, cotyledon removal reduced growth to a larger extent in the light than under shade. The time course of the impact of...

Ngày tải lên: 08/08/2014, 01:21

... continuity of the canopy in order to prevent further fire propagation [42]. In addition to intraspecific competition, interspecific com- petition could be considered as an important factor in ... old). In great fires recorded in SE Spain, a decrease in the effects of interspecific competi- tion by partial elimination of Cistus monspeliensis L. individ- uals increased sur...

Ngày tải lên: 08/08/2014, 01:22

... condic- tions. The values of absorptance (α) mea- sured on leaves from the same seedlings are indicated in the insert. Interestingly, they were very close to the ... An analysis of the relative rates of carboxylation and oxygenation of RuBP in the chloroplasts yielded indirect estimates of cc. Rates of oxygenation were compu...

Ngày tải lên: 08/08/2014, 18:21

... for the preservation of genetic resources of forest tree species populations. Further, the risk of the temporal or permanent deterioration of forest site conditions is much lower in comparison ... fir production capac- ity in the area of the Training Forest Enterprise Hůrky of the Forest High School in Písek. In: Proceedings Role of the Forest St...

Ngày tải lên: 07/08/2014, 03:22

... 323–329 confirmed under conditions of this investigated locality. CONCLUSION Based on the analysis of a part of results from the international IUFRO trial CZ 14 Machov investigat- ing the effect of ... the direction of prevailing winds, in contradiction to plot 3 where the skid- ding track follows the direction of prevailing winds. – Stands without tending and...

Ngày tải lên: 07/08/2014, 03:22

... well. Mainly the interception of horizontal precipitation is important in mountain forest stands. us the lower amount of water penetrated onto the forest floor in the sparse stand. From the statistical ... month in the winter season and in 14-day intervals in the other seasons. Samples were transferred to the laboratory and prepared for the analyses usu...

Ngày tải lên: 07/08/2014, 04:20