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    Wyświetlanie 1-11 z 11
    Tytuł:
    Uszkodzenia drzew w następstwie trzebieży wczesnych w nizinnych drzewostanach świerkowych
    Tree damage in lowland spruce stands caused by early thinnings
    Autorzy:
    Bembenek, M.
    Giefing, D.F.
    Karaszewski, Z.
    Mederski, P.S.
    Szczepańska-Alvarez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/991597.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    uzytkowanie lasu
    drzewostany nizinne
    trzebiez wczesna
    drzewostany swierkowe
    swierk
    uszkodzenia drzew
    spruce
    tree damage
    timber harvest methods
    early thinning
    Opis:
    The paper presents analysis of tree damage after early thinning in lowland spruce stands. Percentage of tree with damage and weighted damage index (WDI) were considered. Three different thinning operations were analysed, in which different cutting method was applied. The smallest level of damage was observed when short wood system (SWS) was used. There were no significant differences between frequency of damage when full tree (FTS) and long wood (LWS) systems were compared.
    Źródło:
    Sylwan; 2013, 157, 10; 747-753
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany tendencji wzrostowych głównych lasotwórczych gatunków drzew w Europie i obszarach górskich Polski oraz ich przyczyny. Część I. Zmiany tendencji wzrostowych
    Growth trends of the European main forest tree species and potential causes. Part I. Changes in growth trends
    Autorzy:
    Jaworski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026478.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gatunki lasotworcze
    Polska
    Quercus
    lesnictwo
    Picea abies
    Europa
    Pinus sylvestris
    wzrost roslin
    buk zwyczajny
    Abies alba
    sosna zwyczajna
    dab
    jodla
    Fagus sylvatica
    przyrost drzew
    drzewa lesne
    swierk pospolity
    increment
    volume
    european beech
    scots pine
    norway spruce
    silver fir
    sessile oak
    Opis:
    The paper provides information concerning the growth of pine, spruce, oak, beech and fir stands based on the research conducted by the European Forest Institute in a number of the European countries and in Poland. Noteworthy i.a. is the increase in volume increment of spruce and pine in some stands in Germany up to 250% of the values given in the yield tables. Since the early fifties of the past century beech and sessile oak in Bavaria have exhibited an increase in the height growth and volume increment. Their values markedly exceed those provided in the tables. Fir, similar to spruce, pine and beech shows the reduction in the increment and dieback in the regions under heavy industrial pollution. However in other regions under the impact of air pollution the response of pure and multispecies stands with the share of fir was positive. In Poland, a rapid decline in the dbh increment in three tree species (fir, spruce, pine) in the seventies was greater than in the sixties. In 1981−1989, fir showed a favourable growth in diameter; this positive tendency was noticed in the whole range of fir distribution in Poland, though the increment did not return to the level before its decline. The pine increment regenerated after 1990. The poorest increment was found in spruce in the eighties following its collapse in the seventies (Żywiecki and Śląski Beskid).
    Źródło:
    Sylwan; 2003, 147, 06; 99-106
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uszkodzenia drzew w nizinnych drzewostanach świerkowych podczas zabiegu trzebieży późnej
    Tree damage in lowland spruce stands because of late thinning
    Autorzy:
    Bembenek, M.
    Giefling, D.F.
    Karaszewski, Z.
    Mederski, P.S.
    Szczepańska-Alvarez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/993989.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    uzytkowanie lasu
    drzewostany nizinne
    trzebiez pozna
    pozyskiwanie drewna
    metody pozyskiwania drewna
    drzewostany swierkowe
    swierk
    uszkodzenia drzew
    norway spruce
    tree damage
    thinning operations
    Opis:
    The paper studies tree damage after late thinning operation in lowland spruce stands. The research was done in the 4ͭʰ age class stands, where three different methods of timber harvesting were applied: full tree system (FTS), long wood system (LWS), short wood system (SWS). The lowest level of damage was observed in SWS.
    Źródło:
    Sylwan; 2013, 157, 12; 892-898
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena dokładności stałych krzywych wysokości dla drzewostanów świerkowych
    Assessment of the accuracy of uniform height curves for spruce stands
    Autorzy:
    Socha, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023142.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    stale krzywe wysokosci
    dendrometria
    drzewostany swierkowe
    Picea abies
    lesnictwo
    dokladnosc
    swierk pospolity
    drzewa lesne
    tree height
    height curve
    uniform height curves
    norway spruce
    Opis:
    The paper presents assessment results of the accuracy of uniform height curves developed for mountain spruce stands of Poland [Bruchwald, Wróblewski 1994]. The empirical material was collected in 171 spruce stands in Beskid Zachodni. Moreover, the relationship between the errors of uniform height curves and dendrometric characteristics of stands was also analysed. The research results demonstrated that the accuracy of uniform height curves is close to the accuracy obtained by applying the height curve developed for a given stand.
    Źródło:
    Sylwan; 2004, 148, 06; 3-9
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reakcja przyrostowa świerka w powiązaniu ze stopniem uszkodzenia korony
    Increment reaction of Norway spruce in connection with the crown damage level
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016122.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    korony drzew
    stopien uszkodzenia
    Picea abies
    lesnictwo
    piersnice drzew
    przyrosty roczne
    przyrost drzew
    swierk pospolity
    drzewa lesne
    increment of the diameter at the breast height
    increment reaction
    criteria of the assessment
    the damage to trees
    defoliation
    vitality
    tree−top condition
    norway spruce
    Opis:
    The study presents the analysis of the increment of tree diameter at the breast height in connection with two variants of the method of assessment the damage to Norway spruce stands. Variants utilise different assessment criteria. The first one is based on the tree's defoliation, the other one – on the damage index W that links defoliation, condition of the tree−top and branching in the middle part of the crown. Detected relations between damage criteria and type of the increment reaction show that index W characterises the damage to trees and stands better than feature A (defoliation). Therefore, method of assessment the damage to trees and stands based on this parameter is suggested for utilisation in the forestry practice.
    Źródło:
    Sylwan; 2007, 151, 11; 22-34
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Datowanie dendrochronologiczne drewna z obudów górniczych w kopalni złota w Złotym Stoku
    Dendrochronological dating of timbers wood in the gold mine from Złoty Stok
    Autorzy:
    Szychowska-Krąpiec, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022706.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drewno sosnowe
    Kopalnia Zlota Zloty Stok
    dendrochronologia
    drewno kopalniane
    drewno jodlowe
    datowanie
    lesnictwo
    tree−ring analysis
    dating
    spruce
    fir
    scots pine
    mine
    Opis:
    The research carried out was aimed at dendrochronological analysis of old timbers from the Gold Mine in Złoty Stok. The analysis resulted in 15 absolute datings of timbers of two tree species: Scots pine and fir. The established data fell into four last centuries. The oldest date, after 1667 AD, was obtained for fir wood from timbering of a shaft in the Masters' Adit (sztolnia Mistrzów), whereas the youngest one, after 1941 AD – for pine wood from the Prince's Adit.
    Źródło:
    Sylwan; 2005, 149, 12; 53-59
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wieloletnie zmiany składu gatunkowego drzewostanów naturalnych w Puszczy Białowieskiej
    Long-term changes of tree species composition in natural stands of the Bialowieza Forest
    Autorzy:
    Paluch, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/989856.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    drzewostany naturalne
    zmiany skladu gatunkowego
    struktura drzewostanu
    kierunki zmian
    tempo zmian
    białowieża national park
    natural stands
    undergrowth
    hornbeam expansion
    spruce reduction
    Opis:
    In the paper the long term dynamics (about 40 years) of selected, the most important, natural forest stands of the Białowieża Forest were presented. The studies were carried out on 120 permanent study plots, located both in nature reserves and in the Białowieża National Park. The DBH of all the trees were measured and the number of all the individuals trees and shrubs species with the height under 1,3 m was counted. The analysis of tree species composition and their density changes was carried out, as well as their natural regeneration was analyzed. The strong expansion of hornbeam were observed (fig. 1a, b; tab.). Actually this species was predominant in forest stands, in natural regeneration and was expansive to the more oligotrophic and mezotrophic forest stands, causing their unification towards hornbeam forest. Norway spruce generally declined in abundance and became limited to oligotrophic forest communities. Significantly reduction this species were observed, especially on the mixed coniferous forest at mixed deciduous forest stands. Scots pine, oak and birch declined their share in forest stands, as well as their natural regeneration have been limited too (tab.). In the short time of the last 15 years, the strong reduction of ash share in forest stands has been observed, and the more rapid changes in all the forest stands composition as well.
    Źródło:
    Sylwan; 2015, 159, 04; 278-288
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia świerka, jodły i modrzewia w Sudetach Zachodnich
    Degree of damage to spruce, fir and larch stands in the Western Sudetes
    Autorzy:
    Korzybski, D.
    Mionskowski, M.
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/993196.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy gorskie
    drzewostany swierkowe
    drzewostany jodlowe
    drzewostany modrzewiowe
    drzewa lesne
    swierk
    Picea
    jodla
    Abies
    modrzew
    Larix
    uszkodzenia drzew
    stopien uszkodzenia
    defoliacja
    stopien defoliacji
    zywotnosc
    stan wierzcholka drzewa
    Nadlesnictwo Kamienna Gora
    Nadlesnictwo Szklarska Poreba
    Nadlesnictwo Sniezka
    Nadlesnictwo Swieradow
    Sudety Zachodnie
    tree damage index
    defoliation
    tree growth response
    Opis:
    The aim of this research was to assess damage to three important forest−forming trees species in the mountains – spruce, fir and larch, and to study their increment reaction to changing environmental conditions. Research concerned forests under the management of four forest districts located in the Western Sudetes (SW Poland). Index W ranging from 0 to 3 was used for the assessment of the damage to trees based on three crown characteristics: defoliation, top−crown condition and tree vitality. Trees of damage degree 2 dominated in each of the species; dying trees (degree 3) were also found. Total share of these two degrees of damage was ca 80% for spruce, 84% for fir and 74% for larch. Analysis of increment reaction of investigated species showed their similar response to changes in the environment. The increase in the share of trees showing positive responses and the decrease in the share of negative responses in the past half century, indicate an improvement in the growth conditions of spruce, fir and larch in Western Sudetes.
    Źródło:
    Sylwan; 2013, 157, 02; 104-112
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Krótkookresowe reakcje przyrostowe jodły, świerka i sosny rosnących w jednorodnych warunkach siedliskowych
    Short-term incremental response of silver fir, Norway spruce and Scots pine growing in uniform habitat conditions
    Autorzy:
    Wilczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/991702.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    dendroklimatologia
    drzewa lesne
    jodla pospolita
    Abies alba
    swierk pospolity
    Picea abies
    sosna zwyczajna
    Pinus sylvestris
    przyrosty radialne
    reakcje przyrostowe
    dendroclimatology
    abies alba
    picea abies
    pinus sylvestris
    tree−ring
    central poland
    Opis:
    Study was performed in multi−species stand located in the Świętokrzyski National Park (central Poland). Silver fir, Norway spruce and Scots pine trees that grew in a uniform habitat conditions were selected. The trees showed the differences and similarities of changes of the size of radial increment, which result from species−specific sensitivity to selected meteorological elements.
    Źródło:
    Sylwan; 2013, 157, 06; 442-452
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wieku drzewostanu macierzystego na wybrane cechy fizyczne nasion świerka pospolitego
    Influence of the age of parent stand on selected physical properties of Norway spruce seeds
    Autorzy:
    Kaliniewicz, Z.
    Markowski, P.
    Anders, A.
    Tylek, P.
    Krzysiak, Z.
    Fura, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/987167.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany mateczne
    wiek drzewostanu
    wiek drzew
    swierk pospolity
    Picea abies
    nasiona
    cechy fizyczne
    sortowanie
    tree age
    seeds
    properties
    variation
    correlation
    sorting
    picea abies
    Opis:
    The objective of this study was to determine the influence of the age of parent tree stand on selected physical properties of Norway spruce seeds to improve the efficiency of seed separation processes. Seeds were harvested in a forest complex located in the seed zone No. 202, in the municipality of Kruklanki in the Borki Forest District (N Poland) during mast years (1999, 2004, 2007 and 2012). The experimental material comprised of Norway spruce seeds from three differently aged tree stands (86, 119 and 129 years old in the first harvest year). The following measurements were performed for each seed: terminal velocity – with a pneumatic classifier; length and width – with a laboratory microscope; thickness – with a thickness gauge; angle of external friction – on an inclined plane, in two positions on a steel friction plate, and mass – with a laboratory scale. The results were used to calculate the arithmetic and geometric mean diameters, aspect ratio, sphericity index and density of seeds. The values of the analyzed properties were compared with ANOVA for factorial designs and linear correlation analysis. The results of the study indicate that Norway spruce seeds obtained from cones harvested in 2012 are characterized by the highest thickness and, consequently, by the highest values of the aspect ratio and sphericity index. The age of parent trees significantly influences the majority of physical properties of seeds. However, the patterns of observed changes are difficult to interpret due to the impact of weather conditions and the genetic potential of parent trees, which perform differently in response to changing climate and geomorphological conditions. Over the analyzed 13−year period a gradual increase was noted in the width, geometric mean diameter, aspect ratio and sphericity index of seeds, whereas the length and density of seeds decreased. Therefore, Norway spruce seeds should be separated mostly with the use of mesh screens with longitudinal openings, pneumatic separators and graders. The use of those devices, separately or in combination, for sorting Norway spruce seeds into mass fractions could contribute to more uniform seedling emergence when every seed fraction is sown separately.
    Źródło:
    Sylwan; 2017, 161, 07; 548-557
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Klimatyczne uwarunkowania przyrostu na grubość świerka (Picea abies (L.) H. Karst.) z regionu Parku Narodowego Ormtjernkampen w Norwegii
    Effect of climatic conditions on the width increment in Norway spruce (Picea abies (L.) H. Karst.) from the Ormtjernkampen National Park in Norway
    Autorzy:
    Muter, E.
    Bednarz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026401.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    czynniki klimatyczne
    przyrost na grubosc
    Norwegia
    sloje przyrostu rocznego
    park Narodowy Ormtjernkampen
    grubosc
    Picea abies
    lesnictwo
    dendroklimatologia
    swierk pospolity
    drzewa lesne
    picea abies
    tree−ring analysis
    radial increment
    dendroclimatology
    ormtjernkampen national park
    norway
    scandinavia
    Opis:
    A local tree ring chronology for Norway spruce from the Ormtjernkampen National Park in Norway has been developed for the years 1808−1996. The widths of annual tree rings are shown as absolute [mm] and standardised values. The dendroclimatic analyses have demonstrated that high June−July air temperatures and atmospheric precipitation in January have a stimulatory effect on ring formation. The high air temperatures of April in the current year and of June and September in the year prior to ring formation have a limiting effect on radial increment.
    Źródło:
    Sylwan; 2003, 147, 03; 47-56
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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