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    Tytuł:
    Problem szkód w lasach powodowanych przez śnieg i wiatr oraz sposoby przeciwdziałania im
    Damage of forests caused by snow and wind and the ways of counteracting it
    Autorzy:
    Zachara, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018613.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szkody w lesie
    wiatry
    lasy
    snieg
    lesnictwo
    czynniki abiotyczne
    abiotic damage
    scots pine
    norway spruce
    silviculture
    Opis:
    The paper is a review of contemporary national and world literature related to the issue of damage to forests caused by wind and snow with special consideration of the most threatened species i.e. pine and spruce. The counteracting of the damage by means of rational forest management and silvicultural methods were discussed. The paper focuses on both, the shaping of individual susceptibility of trees and collective stability based on the spatial−time order.
    Źródło:
    Sylwan; 2006, 150, 10; 56-64
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ zagęszczenia na wzrost i jakość hodowlaną sosny w odnowieniach naturalnych
    Effect of density on growth and silvicultural value of Scots pine in natural regeneration
    Autorzy:
    Tarasiuk, S.
    Kopeć, K.
    Drozdowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/973324.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    hodowla lasu
    odnowienia naturalne
    naloty
    sosna zwyczajna
    Pinus sylvestris
    leśnictwo
    młodniki
    wzrost roślin
    zagęszczenie drzew
    przyrost wysokości
    jakość hodowlana
    scots pine
    natural regeneration
    stand tending
    tree height
    silvicultural quality
    biotic and abiotic damage
    Opis:
    The paper was aimed at determination of the effect of different tree density in the naturally regenerated monotypic and even aged young Scots pine stands growing in the fresh coniferous or mixed fresh coniferous forest sites on their further development. Research was carried out in Nowa Dęba Forest District (south−eastern Poland). A total of 12 research plots (160×40 m) were established in the selected stands. Plots were divided into 4 equal square pieces (40×40 m), where different methods of tending were applied (variant A – control, variant B – thinned, leaving 16 thousand trees/ha, variant C – thinned, leaving 10 thousand trees/ha, variant D – thinned, leaving 6 thousand trees/ha). The thinning was carried out in April 2007. In subsequent years (2007−2010), selected elements of stand structure like: height, height increment, density and damage resulting from abiotic and biotic factors were determined. Tree density significantly influenced both height increment and qualitative (tree shape) characteristics of naturally regenerated young pine trees. In the course of early thinnings, the number of trees needs to be reduced approximately down to the 10−16 th. stems/ha in the first stage of growth (seedlings), and further down to about 6 th./ha in the coppice stage. Such density enhances the chance of good growth and silvicultural quality of the stand. Noteworthy, even the heavy thinning does not significantly impact the actual proportion of both biotic (e.g. ungulate browsing) and abiotic (e.g. heavy snow) damage in the young naturally regenerated Scots pine forest stands.
    Źródło:
    Sylwan; 2015, 159, 12; 989-996
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model składu gatunkowego drzewostanu dla lasów w Sudetach z uwzględnieniem zmian klimatycznych
    Species composition model for the forests of the Sudety Mountains with regard to climate change
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Mionskowski, M.
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/979139.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    abiotic and biotic factors
    climatic change
    forest damage
    forest functions
    stand composition
    Opis:
    Climate change creates a big challenge for forest science. One of several problems calling for urgent solution concerns the elaboration of the scientific foundations for determination of the species composition of forest stands under changing environmental conditions. This problem is particularly acute in case of declining Norway spruce stands in the Sudety Mountains (SW Poland). The paper presents the main principles used to develop a model allowing determination of the most desirable species composition for any given forest stand occurring in the Sudety region. These principles include: 1) an assumption that a basis for species composition planning should be a forest site type, corrected by means of site index of the currently existing forest stand, 2) a supposition that one should broadly consider present processes taking place in Sudety stands, particularly, an intense forest dieback caused by recurring drought periods and strong winds, 3) a postulate that one should consider the differences between tree species in respect to their reaction to particular abiotic factors, 4) an assumption that majority of stands should consist of several different tree species, 5) an assumption that introducing on a wide scale Douglas fir, well−adapted to the conditions of the Sudety Mountains, is allowed, 6) an idea that one should take into account differentiated production potential and varied timber quality of particular tree species, 7) an assumption that one should consider the main features of topography (altitude, exposition, slope) as well as 8) fine elements of micro−topographical situation, as a basis for introduction of different tree species. The results obtained by means of the model based on the above mentioned principles are presented on the example of two forest districts: Lądek−Zdrój (fig. 4a, b) and Szklarska Poręba (fig. 5a, b). In both cases, a necessity to diminish the share of Norway spruce and to increase the share of such species like common beech, silver fir, Douglas fir and European larch is demonstrated. One may expect that projected compositions, taking into account the most appropriate tree species and their most suitable localizations, will allow establishment of forest stands which will be more resistant to drought and wind and, thus, will be more able to fulfill several important forest functions (related to water and soil protection, protection of forest biodiversity and timber production).
    Źródło:
    Sylwan; 2020, 164, 06; 454-466
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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