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    Wyświetlanie 1-3 z 3
    Tytuł:
    Koncepcja wykorzystania analizy ex post do sporządzania aneksu ekonomicznego planu urządzenia lasu
    Application of an ex post analysis for the preparation of the economic annex to the forest management plan
    Autorzy:
    Adamowicz, K.
    Kożuch, A.
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/989428.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    urzadzanie lasu
    ekonomika lesnictwa
    plan urzadzania lasu
    analiza ex post
    aneksy
    aneks ekonomiczny
    forest management plan
    economic aspects of forestry
    economical annex
    ex post analysis
    Opis:
    The aim of the work is to present (i) the economic issues included in the forest management plans and (ii) the methodical bases of an ex post economic expertise, which may be carried out in order to evaluate the previous economic period, and should be a part of the economic annex to the forest management plan. Such expertise allows to formulate postulates and objectives to achieve in the near future, which are important for the forestry economics. The transformation in Poland occurred when the third revision of the forest management plans and instruction of the 1980 and 1994 were applied and caused significant changes in the Polish forestry. As a result, the concept of sustainable development of forestry appeared and the indicators and criteria for sustainable forest development were elaborated. However, they concerned mainly natural and social aspects, while the economic aspect was marginalized. Gradually, foresters began to appreciate the role of the economic analysis. The first versions of such expertise was already elaborated for the individual forest districts. The experience gained will certainly contribute to their dissemination and appreciation of included analysis and forecasts. The economic annexes should include information on value of the forest with an indication of the value of land and the stands themselves. The knowledge on the value of the forest, except for registration, is also required in determining changes as a result of business (in the income statement). The valuation of timber resources is also necessary in the evaluation of the effectiveness of economic projects in forestry affecting the changes in their value. In practice, the valuation of the forest is also essential in case of a change in the ownership or land use status. This usually applies to the sale, purchase, conversion or liquidation of the co−ownership, and also compensation for expropriation because of the road or residential construction. Furthermore, determination of the forest value is necessary in assessing the share of agriculture in national income. This applies particularly to the integrated economic and environmental national accounts in forestry, conducted in some European Union countries. The presented methodology of economic expertise points out the possibility of application the formula that introduces standardization of analysis of economy in the last economic period. It is also the contribution to the discussion on the elaboration of a single, synthetic parameter, which may influence on objectivity of economic conditions of the functioning of the forest holding.
    Źródło:
    Sylwan; 2016, 160, 11; 883-892
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ typu siedliskowego lasu na wielkość i masę igieł opadających w ciągu roku w 30-letnich drzewostanach sosnowych
    Impact of the forest habitat type on the size and mass of the annual needles fall in 30-year-old Scots pine stands
    Autorzy:
    Turski, M.
    Beker, C.
    Jaszczak, R.
    Szymański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979218.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    sosna zwyczajna
    Pinus sylvestris
    czynniki siedliska
    typy siedliskowe lasu
    leśnictwo
    opad igieł
    needles fall
    mass and size
    forest habitat
    Opis:
    The article presents the size and weight of needles in 30−year−old Scots pine stands over one year with regard to the site conditions in which they grow (fresh mixed coniferous and fresh coniferous habitats). Two rectangular 1−hectare sample plots, which differed from one another only with the habitat type, were set up in Maszewo forestry in the Cybinka Forest District (western Poland). The plots were divided into 100 one−acre subplots, which were ascribed numbers from 1 to 100. In order to pick 10 plots a random number generator was used. The middle of the chosen plot became the central point of the 1−acre circular sample plots, where the measurements of all diameters at breast height and the height of every fifth tree were taken. Moreover, it was also the place where a square needle collection container (20 cm high, 1 m2 area) was located. The empty containers were placed in both experimental plots on 1st August 2017 and they were emptied on the first day of each month, throughout the entire year. The entire material was dried at the temperature of 65°C with an induced air flow. The needle mass was measured with the accuracy up to 0.001 g. Out of the samples collected each month, 300 needles were chosen at random in order to measure their length (after they were scanned with WinFOLIA program the size of each individual needle was established). Throughout the entire year, on fresh coniferous habitat the mass of the fallen needles was 2.8203 t/ha and it was by over 20% higher than it was determined for the fresh coniferous habitat. The lowest mass of the needle fall in each stand was in January, and the greatest in September on the fresh coniferous habitat, whereas in October on the fresh mixed coniferous habitat. In both of these cases, it was more than a half of the needle mass for the entire year. The average length of the fallen needles was in each month smaller on the fresh coniferous habitat and the differences between the analyzed stands were significant. The difference was the smallest (3.3%) in May, while the greatest (18.8%) in February. Moreover, significant differences in the length of the needles in the particular months in both types of stands were observed. The coefficient of variation for the needles length on the fresh mixed coniferous habitat ranged from 17.4 to 22.8%, whereas on the other habitat it varied between 14.2 and 21.6%. The mean of the coefficients of variation for the particular months was lower by 2.0% and for fresh coniferous habitat it reached 18.25%.
    Źródło:
    Sylwan; 2020, 164, 02; 118-126
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Półnaturalna przebudowa lipą drzewostanów sosnowych w Nadleśnictwie Doświadczalnym Siemianice
    Semi-natural transformation of pine stands with lime trees in the Siemianice Experimental Forest District
    Autorzy:
    Jaszczak, R.
    Magnuski, K.
    Stefaniak, I.
    Winkler, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009712.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    Tilia cordata
    wzrost roslin
    lipa drobnolistna
    przebudowa polnaturalna
    pozycja biosocjalna drzew
    przebudowa drzewostanow
    lesnictwo
    Nadlesnictwo Doswiadczalne Siemianice
    przyrost drzew
    drzewa lesne
    pine stand
    semi−natural transformation
    lime
    breast height diameter structure
    height structure
    biosocial
    structure
    Opis:
    The paper presents results of the inventories carried out in years 2000 and 2001 in a two−storeyed stands whose upper storey was made up of pine and the lower one – of lime. Lime breast height diameter and height as well as biosocial structures were discussed.
    Źródło:
    Sylwan; 2009, 153, 07; 442-450
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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