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    Wyświetlanie 1-3 z 3
    Tytuł:
    Mikoryza siewek i sadzonek drzew leśnych w odnowieniach na powierzchniach zrębowych
    Mycorrhiza of forest tree seedlings in clear-cut regenerations
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016143.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    grzyby mikoryzowe
    zreby
    sadzonki
    mikoryza
    lesnictwo
    siewki
    drzewa lesne
    ectomycorrhizal fungi
    regeneration
    clear−cut
    Opis:
    Biotic and abiotic factors affecting the development of ectomycorrhizal fungal communities in forest regenerations on clear−cuts were discussed basing on the relevant literature.
    Źródło:
    Sylwan; 2007, 151, 11; 3-9
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ sposobu przygotowania gleby na cechy odnowienia naturalnego sosny zwyczajnej (Pinus sylvestris L.) w Nadleśnictwie Spychowo
    Effect of mechanical site preparation methods on characteristics of the natural regeneration of Scots pine (Pinus sylvestris L.) in Spychowo Forest District
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Drozdowski, S.
    Ligocki, M.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/987039.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    Nadlesnictwo Spychowo
    odnowienia naturalne
    przygotowanie gleby
    sosna zwyczajna
    Pinus sylvestris
    siewki
    zageszczenie roslin
    przezywalnosc
    wzrost roslin
    soil scarification
    self−sowing
    seedling density
    seedling growth
    clear−cut
    Opis:
    Mechanical site preparation is recommended to create optimum conditions for seed germination and seedling growth in a clear−cut area. Lack of soil scarification or less−intense methods may be more suitable from an environmental point of view, but can result in a failure to obtain natural regeneration. This study compared the effects of three mechanical site preparation methods (SPM) characterized by different levels of soil scarification (i.e. double mould−board forest plough (LPz), active plough (PA) or forest mill (FL)), as well as a control variant without mechanical site preparation, on height, density, spatial distribution and survival among naturally regenerating Scots pines (Pinus sylvestris L.) in the first 2 years of growth in a clear−cut area of NE Poland. The experiment was based around a four−block randomized block design involving the four variants. Seedling height was measured at the end of the first and second growing seasons, with measurements performed on 8 meter−wide transects extending across the entire width of the cleat−cut. We found no effect of SPM on seedling height, though the density of seedlings regenerating naturally was found to be dependent. After two years, the highest density was achieved in the PA variant (8.1 seedlings/m2) and the FL variant (7.0 seedlings/m2). A significantly lower density characterized the LPz variant (5.1 seedlings/m2) and the lowest of all the variant without soil scarification (3.2 seedlings/m2). The most homogeneous natural regeneration was achieved following the use of PA (2.6% of 1 m2 plots without seedlings after two growing seasons), while the least homogeneous was the variant without soil scarification (22.4% of 1 m2 plots). Survival of pines after the second growing seasons was quite high (over 80%), and did not differ significantly depending on the SPM. Our research therefore confirmed that, in the absence of mechanical site preparation, natural regeneration of sufficient density and homogeneity cannot be obtained. The best natural regeneration was obtained on sites prepared with PA, and FL scarification being only slightly less favorable. The low density and uneven distribution of seedlings on the soil prepared with LPz was a surprising result. The probable reason for this lay in the high precipitation in the first growing season. On one hand, this provided very good moisture conditions for seed germination and seedling growth on a substrate with high porosity in the PA and FL variants, but on the other the high bulk density of mineral soil in the LPz variant led to oxygen deficit.
    Źródło:
    Sylwan; 2017, 161, 03; 196-207
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ mechanicznego przygotowania gleby na zrębie na jej cechy
    Effect of mechanical site preparation on features of the soil in a clear-cut area
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Drozdowski, S.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/986611.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    zreby
    przygotowanie gleby
    zabiegi mechaniczne
    maszyny lesne
    plug LPZ
    plug aktywny jednotalerzowy
    frez lesny
    gleby lesne
    wlasciwosci fizyczne
    wlasciwosci chemiczne
    forest plough
    active plough
    forest mill
    soil scarification
    clear−cut
    Opis:
    In most cases, mechanical site preparation (MSP) is a precondition if high−quality (natural or artificial) regeneration of forests is to be achieved. However, the measures involved here may differ in terms of the level of intervention of the soil environment, at both the surface and deeper down. The choice of MSP methods should be based on climatic conditions, site type and the species whose renewal is sought, while the effect should improve conditions for the emergence and growth of the young generation of trees, with the influence on the soil environment being limited as far as possible. The research sought to compare physical and chemical features of the soils of the microhabitats created in clear−cut areas as a result of MSP using either an LPz double mould−board forest plough (furrow and ridge), an active plough (furrow and ridge) and a forest mill (belt and beyond the belt) as compared with unscarified soil. Investigated physical features included grain size (content of sand, silt and clay), bulk density and actual moisture, while the chemical ones: pHH2O and pHKCl, exchangeable acidity, total content of N and C and the C/N ratio, P2O5 content and base cations Mg2+, Ca2+, K+ and Na+. The most invasive MSP method for the soil environment is the active plough, which leaves the ridge exposed to processes of the decomposition of organic matter (and the highest content of N, C, Mg2+, Ca2+ and K+). Equally, this method may pose the greatest threat of mineral components of the soil being leached, with impoverishment of the habitat ensuing. The forest mill in turn offers the least invasive MSP. Most of the physical and chemical features of soil (other than exchangeable acidity and pHH2O and pHKCl) both in the belt areas and beyond them differed little from the those characterising non−scarified soil. Also the analysed features determined for the furrows ploughed by the active or LPz ploughs or the belt prepared using the forest mill did not differ significantly.
    Źródło:
    Sylwan; 2018, 162, 08; 648-657
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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