MOŻLIWOŚCI WYKORZYSTANIA BEZZAŁOGOWYCH STATKÓW POWIETRZNYCH W NADLEŚNICTWIE ŚWIDWIN

One of the fastest developing scientific disciplines in forestry are geomatics and remote sensing. The use of unmanned aerial vehicles deserves a mention. On the example of the Świdwin Forest District the possibilities of using drones in forestry were presented. Unmanned aerial vehicles are mainly used for fire protection, creation of orthophotomaps, checking the health status of stands, monitoring spruce forests and the promotion of state forests.

MOŻLIWOŚĆ WPROWADZANIA SIEWEM DĘBU W MONOKULTURACH SOSNOWYCH POCHODZĄCYCH Z ODNOWIENIA NATURALNEGO NA TERENIE NADLEŚNICTWA SKWIERZYNA

Oaks have an important economic and natural role in forestry. Due to the change in land use, the problem, in the long run turned out to be obtaining the desired, consistent with the habitat, species composition of crops, derived from natural regeneration of Scots pine. The aim of the work was to show biometric differences in oaks obtained from sowing and planting. The economic aspect of both ways of introducing hardwood admixtures in pine "monoliths" was also taken into consideration. The unit cost of renewing oaks by sowing is 5 times smaller than renewal by planting. The study found no biometric differences between plants. Attention was however paid to better resistance to drought from sowing oaks.

UDZIAŁ LASÓW W OCHRONIE PRZYRODY POPRZEZ OGRANICZENIA UŻYTKOWANIA TERENÓW I ZASOBÓW DREWNA

Limitations of the use of timber resources are about 3 million m3 annually compared to the theoretical production capacity. The area in the Treasury owned forests where restrictions in fulfilling economic functions are obligatory was calculated; this represents about 17.5% of their area. According to the proposed estimates for 2021-2030, it is likely to increase the limitation of timber harvesting for natural and social reasons by about 7% and by 4% in forest areas not serving economic functions. These limitations should be treated as public good in favour of nature conservation.

CHARAKTERYSTYKA WARUNKÓW PLUWIALNO-TERMICZNYCH w ARBORETUM WIRTY W LATACH 1996-2018

The area where the meteorological observations were carried out lies in Pomerania in a region with a cool and humid climate. There are late spring frosts, but also early autumn ones. Increasing rainfall is becoming more frequent, and winters with less than the average number of days with a snow cover. There is a noticeable tendency to the deterioration of optimal conditions for the existence and preservation of forest habitats.

WYNIKI BADAŃ NAD MIESZAŃCEM TOPOLI POPULUS MAXIMOWICZII X POPULUS SIMONII ‘FASTIGIATA’ W NADLEŚNICTWIE KALISKA

The article describes the research carried out in the Kaliska Forest District on a new variety of poplar ‘Zbigniew Stecki’. This poplar is an attractive hybrid of Populus maximowiczii x Populus simonii 'Fastigiata', occurring as a columnar type male clone. The influence of rainfall and temperature on the annual and total tree height was investigated. The amount of rainfall during the growing season does not have a significant influence on the shoot growth in the poplar variety Zbigniew Stecki.

METODY PROWADZENIA ODNOWIEŃ NATURALNYCH SOSNY ZWYCZAJNEJ (PINUS SYLVESTRIS L.) W NADLEŚNICTWIE SKWIERZYNA

For many years, the Skwierzyna Forest District has been a leader among 35 units of the Regional Directorate of State Forests in Szczecin in terms of the area of the obtained natural regeneration of Scots pine. In the Skwierzyna Forest District in the period 2010-2018, 522.93 ha of natural regeneration was recognized, which constitutes 43% of the total regeneration, the habitat of fresh mixed coniferous forest and fresh coniferous forest as optimal for obtaining regeneration of the natural pine. In the spring date of plowing, the forest plow LPz-75 is applied, as the best for obtaining satisfactory self-seeding. The basic method of natural regeneration of pine in the Skwierzyna Forest Inspectorate is the use of a strip-like clear cutting (Ib) in the form of classic narrow sheds, with a cutting width of up to 60 m. It is noteworthy that in the woodcutting the under-eaves undergrowths, arising in forest stands close to the harvest, are left intact and later used within the naturally renovated area.

WPŁYW HURAGANU NA STRUKTURĘ I RÓŻNORODNOŚĆ FLORYSTYCZNĄ GRĄDU NISKIEGO W PIERWSZYM ETAPIE REGENERACJI LASU W UROCZYSKU AMERYCZKA W NADLEŚNICTWIE SZUBIN

The work analyzes changes in the structure and floristic composition in communities in the forest areas that suffered from a hurricane. The analyzes were based on phytosociological studies carried out in the small forest complex "Ameryczka", within and in Szubin Forest District in the years 2017-2019. They showed that after the hurricane, the collective share of phanerophytes and other forest species decreased significantly. The role of non-forest species has increased significantly, especially ruderal and segetal plants from the group of theophytes. Biodiversity has increased at least temporarily.

EFEKTYWNA WIELKOŚĆ POPULACJI – ZNACZENIE W OCHRONIE ZASOBÓW GENOWYCH

The paper describes the effective population size and its importance in the protection of gene resources in conservation biology. The concept of effective population size has been introduced as a mathematical model, which is enriched with many additional factors that can affect the change of the gene pool of the next generation. Depending on the type of effective population size, the results obtained may vary, for example, the inbreeding effective population size and the variance effective population size.

ANALIZA WIELOKRYTERIALNA PRZYDATNOŚCI SIEDLISK DO ODNOWIEŃ NATURALNYCH SOSNY ZWYCZAJNEJ W NADLEŚNICTWIE SULĘCIN Z WYKORZYSTANIEM SYSTEMU GIS

The aim of the work is to show how, thanks to the GIS software, it is possible to increase the size of natural renovated surfaces. By concentrating a large amount of data and applying appropriate criteria, you can plan your business operations in a more accurate way. Along with the planned harvesting activities that are closely related to breeding work, for example, optimization of the export route network can be planned. The ESRI software that has been used in this work allows for and can facilitate planning in the long term of the forest management plan. The paper presents results of the analysis of habitats and pine stands suitable for natural regeneration, which in theory should give breeding success.

PROGNOZA ODDZIAŁYWANIA NA SZATĘ ROŚLINNĄ ORAZ WALORY OCHRONIARSKIE PROJEKTOWANEGO PRZEDSIĘWZIĘCIA POD NAZWĄ „BUDOWA I MODERNIZACJA URZĄDZEŃ SPOWALNIAJĄCYCH ODPŁYW WODY NA TERENIE LEŚNICTWA GAJ” W NADLEŚNICTWIE LUTÓWKO

The purpose of this article is to assess the usefulness of the hydrotechnical project for the natural environment, designed in one of the most valuable fragments of the Lutówko Forest District in terms of natural resources, using phytosociological methods. For the needs of the project, there have been applied both the existing, long-term research on vegetation made in the area of the planned investment, as well as the results of supplementary research. In addition, research transects have been established, which in the future may be used as starting surfaces (zero state) for monitoring studies. As a result, it will be possible to assess thoroughly the effects of implementation and operation of modernized or newly created hydrotechnical equipment under the small retention program. The research shows that the planned investment will have a particularly large and positive impact on the plant groups developing on hygrophilous habitats. Currently, most of them are subject to various forms of degeneration related to the lowering of groundwater levels. In some ecosystems, acceleration of natural succession processes is also observed. Due to the high nature, landscape and protection value, especially the location in the Natura 2000 site, the project must take into account water level fluctuations, both in the calendar year and in the long term. It is therefore necessary to monitor its impact on plant communities. Research areas established on eight transects located in the area of modernized or newly created hydrotechnical devices are to serve this purpose.