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    Wyświetlanie 1-7 z 7
    Tytuł:
    Rębnia przerębowa w drzewostanach sosnowych
    Selection-management in pine stands
    Autorzy:
    Andrzejczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018245.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    rebnie
    rebnie przerebowe
    lesnictwo
    scots pine
    pinus sylvestris
    multi−generation
    selection−cutting system
    Opis:
    This study presents the results on the structure and volume of many−aged pine stands in private forest holdings managed under semi−selection system. Their volume was ca 150 m3/ha and the basal area ca 20 m3/ha. Pine stands reveal all−age structure. The conditions of reaching the multi−generation pine stands is poor habitat where pine regeneration shows high competitive ability and density distribution of trees, including the occurrence of gaps and openings in stand overstorey ensuring proper conditions for the appearance and development of new regenerations of pine.
    Źródło:
    Sylwan; 2006, 150, 08; 52-60
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 2. Procesy zamierania i dorastania oraz ich wpływ na rozkład grubości drzew
    Structure and dynamics of uneven−aged, Scots pine−dominated, old−growth stands in Kaliszki and Sieraków strict reserves in Kampinos National Park. Part 2. Tree mortality and recruitment processes and their effects on tree diameter distributions
    Autorzy:
    Brzeziecki, B.
    Zajączkowski, J.
    Olszewski, A.
    Bolibok, L.
    Andrzejczyk, T.
    Bielak, K.
    Buraczyk, W.
    Drozdowski, S.
    Gawron, L.
    Jastrzębowski, S.
    Szeligowski, H.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/979128.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    demographic non−equilibrium
    diameter structure
    long−term study
    old−growth forest
    permanent study
    plot
    scots pine
    strict protection
    Opis:
    Two fundamental demographic processes (tree recruitment and mortality) are analyzed for forest stands growing on permanent study plots located in strictly protected Scots pine−dominated, old−growth stands of Kampinos National Park (central Poland). The major implications of the observed demographic trends for the general shape of tree size distributions are determined, as well. During the past ca 30 years, in the stands sampled, there was a pronounced lack of balance between mortality and recruitment processes. Mortality rate was eight times higher than recruitment rate. Eventually, there was a net significant decline in population density, observed for all major tree species, including Scots pine, pedunculate oak, silver and downy birch, and black alder. As mortality processes affected mainly smaller trees, there was also a significant deterioration of the general demographic status of most important tree species. This effect was shown by the change of the overall shape of diameter distributions over the study period: from reverse J−shaped to flat curves running nearly parallel to X−axis. The values of recruitment rates were markedly lower, and the values of mortality rates – significantly higher, than analogous values characterizing comparable forests (e.g., those obtained for the natural stands of Białowieża National Park). Low recruitment rates, as obtained for Kampinos stands, suggest that presently, in the local, Scots pine−dominated, old−growth stands, the general conditions for forest regeneration and for maintaining a long−term demographic stability are unfavorable. Most probably, the regeneration of this type of forest has an episodic, ‘wave−like’ character and corresponds to the ‘catastrophic’ model, according to which the successful regeneration of current dominants (especially Scots pine, silver and downy birch, black alder) must be preceded by a stand−initiating (stand−replacing) disturbance, leading to total or partial, but heavy, destruction of the currently existing stand. At the moment, it would be difficult to predict, however, if and when such a disturbance will affect the stands under investigation. Thus, we predict that in the nearest future at least, the state of overall demographic unbalance will continue or even increase.
    Źródło:
    Sylwan; 2020, 164, 06; 443-453
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ przygotowania gleby na zagęszczenie, wzrost i jakość samosiewów sosny w warunkach podokapowych
    The effect of soil preparation on density, growth and quality of natural regeneration of pine under the canopy
    Autorzy:
    Andrzejczyk, T.
    Drozdowski, S.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026387.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    wzrost roslin
    samosiewy
    hodowla lasu
    przygotowanie gleby
    lesnictwo
    odnowienia naturalne
    odnowienia podokapowe
    scots pine
    natural regeneration
    soil preparation
    Opis:
    The studies were conducted in the years of 1997−2001. The effect of four methods of soil preparation (ploughing with double mouldboard plough LPZ−75, disc plough PTL−2, disc harrowing and ridge formation) on natural regeneration of pine under the canopy shelter was analysed. Significant differences in the density, height and vitality of seedlings in the variant II (ploughing with disc plough) and variant IV (ridge formation) were found in the second and third year of studies. In the following years the differences between the variants were insignificant due to the heavy damage of seedlings caused by the cockchafer larvae. Neither of the methods applied protected the seedlings against this damage.
    Źródło:
    Sylwan; 2003, 147, 03; 19-27
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ przygotowania gleby na wzrost sosny zwyczajnej w pierwszych latach uprawy
    The effect of different methods of soil preparation on the growth of Scots pine during first years after planting
    Autorzy:
    Andrzejczyk, T.
    Augustyniak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015759.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wzrost roslin
    hodowla lasu
    sosna zwyczajna
    przygotowanie gleby
    lesnictwo
    udatnosc uprawy
    Pinus sylvestris
    drzewa lesne
    uprawy lesne
    soil preparation
    scots pine
    growth
    survival
    Opis:
    The paper provides a comparison of growth and survival of Scots pines during first four years after planting in response to two methods of soil preparation using a double mouldboard plough (a conventional method) and by rotary type disc plough. The studies were carried out in the poor fresh coniferous forest habitat. The discussed soil preparation methods had a significant impact on tree height and diameter, however they did not affect pine survival. Pine growing in furrows made by the disc plough exhibited better height growth; the furrows were shallower than those made by the double mouldboard plough. After four years, the height growth of pines in both experimental variants reached the same level which indicates a short−term effect of soil preparation on pine growth.
    Źródło:
    Sylwan; 2007, 151, 08; 3-8
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwój naturalnego odnowienia sosny zwyczajnej na powierzchni przygotowanej pługiem dwuodkładnicowym
    The performance of natural regeneration of Scots pine following soil preparation using double mouldboard plough
    Autorzy:
    Andrzejczyk, T.
    Drozdowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026749.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wzrost roslin
    przezywalnosc
    odnowienia lasu
    hodowla lasu
    sosna zwyczajna
    przygotowanie gleby
    lesnictwo
    odnowienia naturalne
    zageszczenie roslin
    Pinus sylvestris
    drzewa lesne
    scots pine
    pinus sylvestris l.
    natural regeneration
    soil preparation
    Opis:
    The objective of the study was to analyse the density, survival, height and quality of Scots pine (Pinus sylvestris L.) seedlings growing in the furrows and on the ridges. On poor sandy soils (fresh coniferous forest habitat) the performance of seedlings growing on ridges was superior while in a moderately fertile type of mixed coniferous forest habitat where the competition of forest floor vegetation was high, natural regeneration occurred almost entirely in the furrows.
    Źródło:
    Sylwan; 2003, 147, 05; 28-35
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza zagęszczenia samosiewów brzozy i sosny na gniazdach na podstawie modelu promieniowania słonecznego
    Analysis of birch and pine seedling density in regeneration patches on the basis of solar radiation model
    Autorzy:
    Bolibok, L.
    Andrzejczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013442.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    samosiewy
    hodowla lasu
    czynniki srodowiska
    naslonecznienie
    lesnictwo
    Betula
    zageszczenie roslin
    zmiennosc
    Pinus sylvestris
    brzoza
    sosna zwyczajna
    rebnie gniazdowe
    odnowienia naturalne
    gap
    natural regeneration
    scots pine
    silver birch
    solar radiation model
    spatial variability
    Opis:
    The spatial variability of the density of Scots pine and silver birch natural regeneration in gaps has different pattern in subsequent development stages. The pine seedling density was inversely proportional to the amount of solar radiation reaching the floor in artificial gap estimated by modeling (the highest density occurred in the southern, shaded part of the gap). The top soil layers drying−off that is a result of the insolation is thought to be the main factor limiting seed germination and early growth of both species, however pine response at this stage was greater. The highest birch undergrowth density was observed in the central part of gaps. It might be the result of relatively low root competition of old trees and a good light supply in this part of the gaps.
    Źródło:
    Sylwan; 2008, 152, 02; 10-19
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ przerzedzenia okapu górnego na rozwój podrostów sosny zwyczajnej (Pinus sylvestris L.) w pogradacyjnych drzewostanach w Lasach Pilskich
    Response of Scots pine [Pinus sylvestris L.] young-growth stands to an overstorey canopy in the postoutbreak stands in Pila Forests
    Autorzy:
    Andrzejczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016341.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    stopien przerzedzenia okapu gornego
    rozwoj roslin
    odnowienia lasu
    hodowla lasu
    podrost
    sosna zwyczajna
    lesnictwo
    odnowienia naturalne
    odnowienia podokapowe
    Pinus sylvestris
    drzewa lesne
    scots pine
    pinus sylvestris l.
    natural regeneration
    undercanopy young−growth stands
    postoutbreak
    stands
    poland
    Opis:
    In the paper the density, height, diameter, slenderness and vitality of the 17 year−old pine young−growth stands depending on the basal area of the shelterwood (four thinning variants: G1−G4). The studies were carried out in eleven 70−90 year−old pine stands heavily damaged in the 80s of the past century by the nun moth (Lymantria monacha L.). With the development of the overstorey the growth, the vitality and the stability of young stands declined. In addition, a decrease in the survival of the young−growth stands under the dense canopy (variant G4) was recorded. A long−term maintenance of young stands under the shelter of the canopy in the areas of low annual precipitation (below 600 mm) requires the reduction of the dbh basal area to the level of at least 15 m3/ha before attaining the age of 15 years.
    Źródło:
    Sylwan; 2007, 151, 01; 20-29
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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