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    Wyświetlanie 1-5 z 5
    Tytuł:
    Wpływ warunków siedliskowych, wielkości gniazda oraz położenia w jego obrębie na wysokość 6- i 10-letnich dębów szypułkowych (Quercus robur L.)
    The influence of site conditions, opening size and location within a gap on height of 6- and 10-year-old pedunculate oaks (Quercus robur L.)
    Autorzy:
    Bolibok, L.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/974048.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Quercus
    odnowienia lasu
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    warunki siedliskowe
    dąb
    leśnictwo
    rębnie zupełne gniazdowe
    wielkość gniazd
    wzrost roślin
    patch cutting
    artificial gap
    pedunculate oak
    gap size
    site type
    spatial height variability
    Opis:
    The influence of artificial elliptical gaps (size 15 and 20 are) on height of young (6 and 10 year old) planted pedunculate oaks was investigated on fresh mixed−coniferous and fresh mixed−broadleaved forest site types. For each combination of age, site type and gap size four gaps were sampled. In each gap, 3 circular sampling plots of 3 m radius were placed in northern, central and southern part of gap. The analysis were carried out separately for 6− and 10−year−old oaks and proved that gap size did not have an influence on height of younger and older oaks. In both cases, site type influence had statistical importance, but the practical silvicultural importance of this difference was only for older oaks. The position within gap was not important for growth of younger oaks, but had an influence on the height of older ones in different manner in different site conditions. The mean height of older oaks growing in more fertile conditions had maximum value in the centre of artificial gaps and diminished towards the periphery. On less fertile site types older oaks were the lowest in the northern position and their height in southern and central part of gaps was comparable.
    Źródło:
    Sylwan; 2011, 155, 02; 84-95
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie się wysokości upraw dębowych w centrum i na obrzeżu gniazd na siedlisku lasu mieszanego świeżego
    Oak saplings height in the middle and peripheral parts of artificial gaps on fresh mixed forest site
    Autorzy:
    Bolibok, L.
    Auchimik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/973248.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    hodowla lasu
    Quercus robur
    odnowienia lasu
    odnowienia sztuczne
    leśnictwo
    drzewa leśne
    dąb szypułkowy
    wzrost roślin
    struktura wysokości
    patch cutting
    artificial gap
    pedunculate oak
    sapling
    competition
    Opis:
    The Polish forest gap trials report oaks height in the middle of a gap or average height of all oaks in the gap. To decide when the shelter of surrounding old trees in no longer needed and old trees between gaps can be cut, a forester should have knowledge how oaks grow in the peripheral part of gaps. In the experiment height of planted oaks in the age from 5 to 11 years growing in 15 are gaps on fresh mixed broad−leaved forest site was measured. The smallest difference in height of oaks growing in the middle and in the peripheral part of gaps was observed for 5−year−old oaks. The difference became bigger as oaks became older. For oaks older than 8 years, saplings in the peripheral parts are on average 40% lower than those in the central part. The height of older oaks in the middle and in the southern periphery of gap was less differentiated than of oaks growing in northern, eastern and western peripheral parts. Large differences in height can provoke oaks to develop bad stem forms (e.g. forked, thick branched). Special care should be taken during pre−commercial thinning to eliminate oaks with bad stems in the peripheral parts of gaps.
    Źródło:
    Sylwan; 2010, 154, 06; 371-380
    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 wysokości otaczającego drzewostanu, wystawy i pochylenia terenu na mikroklimat adiacyjny na gnieździe - wyniki modelowania
    Effect of surrounding stand height, terrain aspect and inclination on radiation microclimate on the gap - results of the modelling
    Autorzy:
    Bolibok, L.
    Brach, M.
    Szeligowski, H.
    Orzechowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989732.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    rebnie gniazdowe
    odnowienia lasu
    odnowienia na gniazdach
    gniazda
    warunki radiacyjne
    srednica gniazda
    wysokosc drzewostanu otaczajacego
    warunki swietlne
    nachylenie terenu
    ekspozycja terenu
    zmiany warunkow radiacyjnych
    modelowanie
    radiation
    aspect
    inclination
    gap size
    modelling
    Opis:
    Different kinds of solar radiation (direct, diffuse) shape microclimate of forest gaps and have significant influence on establishment and growth of young trees. Adjustment of the shape and size of artificial gaps could create favourable conditions that meet the demands of particular species. Unfortunately there is lack of publications concerning this topic, which could be used directly for silvicultural planning in Polish conditions. Empirical assessment of radiation regimes in a wide range of different shaped gaps is impossible from practical reasons, so modelling in ArcGis environment was used instead. Gaps of different shape and size were modelled as elliptical depression in terrain by the use digital elevation model. The Solar Radiation tool was used to model direct and global radiation on the bottom of the gaps with area varying between 2 and 50 are surrounded by stands of height between 15 to 35 meters. The outcome of modelling was presented in form of nomograms. Additional series of analyses was created to describe the influence of terrain aspect and inclination on solar radiations supplies on the forest floor in gaps. Presented nomograms could be helpful in silvicultural planning, because they could be used to design artificial gaps with expected solar radiations supplies.
    Źródło:
    Sylwan; 2015, 159, 10; 813-823
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ warunków siedliskowych na zróżnicowanie wysokości dębu na gniazdach
    Effect of habitat conditions on the variation of oak height in the gaps
    Autorzy:
    Andrzejczyk, T.
    Bolibok, L.
    Buraczyk, W.
    Drozdowski, S.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/991003.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    rebnie zupelne gniazdowe
    hodowla lasu
    odnowienia lasu
    odnowienia na gniazdach
    drzewa lesne
    dab szypulkowy
    Quercus robur
    wzrost roslin
    warunki siedliska
    siedliska lesne
    bor mieszany swiezy
    las mieszany swiezy
    las swiezy
    pedunculate oak
    clear−cut gap
    plantations
    forest regeneration
    patch cutting system
    Opis:
    The paper presents the study on the height of 10−12−year−old pedunculate oak regeneration in clear−cut gaps in three fertility variants: mezotrophic of poorer productivity (fresh mixed coniferous forest – BMśw), mezotrophic of higher productivity (fresh mixed deciduous forest – LMśw) and eutrophic (fresh deciduous forest – Lśw). BMśw and LMśw were represented by two locations: Gostynin (G) and Parczew (P), while Lśw – by one: Czarna Białostocka (CzB). We analysed the variation of oak height in the patches along the north−south (N−S) and east−west (E−W) gap axes. In each location 3−5 gaps were selected and measurements taken on three transects along the N−S axis located in the western (W), central (C) and eastern (E) part. Significant differences in oak height were found along the N−S axis. Oaks in the BMśw and LMśw habitats in the south−central part, and those in the Lśw habitat in the centre−northern part of the patch were the highest. The height growth of oaks on sandy soils (BMśw, LMśw) was found to be limited by moisture deficit, while on loamy soils (Lśw) – by light deficiency. The differences in oak height along the E−W axis were smaller and less apparent, indicating a tendency towards the reduction of their height growth in the central part of the gap.
    Źródło:
    Sylwan; 2014, 158, 06; 404-413
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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