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Wyszukujesz frazę "siedlisko lasu swiezego mieszanego" wg kryterium: Temat

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    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:
    Wpływ masowego zamierania świerka w drzewostanach Białowieskiego Parku Narodowego na odnowienie naturalne dębu
    Influence of spruce decline in stands of the Bialowieza National Park on natural oak regeneration
    Autorzy:
    Bobiec, A.
    Bobiec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1007250.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Bialowieski Park Narodowy
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    powierzchnie badawcze
    drzewostany swierkowe
    dynamika drzewostanu
    swierk pospolity
    Picea abies
    zamieranie drzew
    dab
    Quercus
    struktura grubosci
    odnowienia naturalne
    podrost
    diameter structure
    disturbances
    ground fires
    regeneration wave
    stand decline
    Opis:
    The study aimed at analyzing the oak population structure was performed on the 29−hectare plot representing stands dominated by spruce in the strict reserve of the Białowieża National Park. It revealed that oaks represent two distinct cohorts: the old, emerged in the late 1800s, and the new that is being established in the area subject to mass decline of spruce. We suggest that the first regeneration wave was the result of ceasing the frequent ground fire regime that prevented the regeneration of trees except for pine. The current wave has been prompted by a set of changes in the habitat quality, following the breakdown of dense spruce−dominated stands. These changes, such as access to sunlight, accelerated decomposition of spruce litter, local exposure of mineral soil, and protective structures of lying spruce logs, provide regeneration advantage to oak and other intolerant species.
    Źródło:
    Sylwan; 2012, 156, 04; 243-251
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyrost radialny jodły pospolitej (Abies alba Mill.) w Puszczy Iłżeckiej
    Diameter increment of silver fir (Abies alba Mill.) in the Ilzecka Forest
    Autorzy:
    Bis, R.
    Dobrowolska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/45450.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    przyrosty radialne
    czynniki srodowiska
    czynniki klimatyczne
    siedliska lesne
    Puszcza Ilzecka
    siedlisko lasu swiezego
    siedlisko lasu mieszanego swiezego
    Źródło:
    Leśne Prace Badawcze; 2012, 73, 3
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przestrzenne zróżnicowanie drzewostanów daglezjowych (Pseudotsuga menziesii (Mirbel) Franco) odnowionych sadzeniem na siedliskach BMśw i LMśw
    Spatial diversity of Douglas fir [Pseudotsuga menziesii [Mirbel] Franco] stands planted on fresh mixed coniferous and fresh mixed broadleaved sites
    Autorzy:
    Szmyt, J.
    Korzeniewicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009028.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany daglezjowe
    zroznicowanie przestrzenne
    drzewa lesne
    daglezja zielona
    Pseudotsuga menziesii
    struktura przestrzenna
    siedlisko boru mieszanego swiezego
    siedlisko lasu swiezego mieszanego
    spatial structure
    structural indices
    artificial stands
    douglas fir
    Opis:
    The paper describes the spatial diversity of 30−year old Douglas fir stands established by planting on fresh mixed coniferous and fresh mixed broadleaved sites. Analysis was carried out with reference to the horizontal structure (type of tree distribution over an area) and the spatial diversity of living trees size (dbh and height). Easily measurable structural indices as Clark−Evan aggregation index, contagion index and the height and diameter differentiation indices were used.
    Źródło:
    Sylwan; 2010, 154, 11; 791-800
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przestrzeń pojedynczego drzewa w drzewostanie panującym w zależności od wieku oraz typu siedliskowego lasu na przykładzie modrzewia (Larix decidua Mill.)
    Single tree space in a dominant stand in relation to age and forest habitat type on the example of larch [Larix decidua Mill.]
    Autorzy:
    Kaźmierczak, K.
    Pazdrowski, W.
    Nawrot, M.
    Szymański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009015.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    dendrometria
    drzewostany panujace
    wiek drzew
    klasy Krafta
    drzewa lesne
    modrzew europejski
    Larix decidua
    przestrzen wzrostu
    przestrzen pojedynczego drzewa
    siedliska lesne
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    growth space
    crown
    age
    habitat type
    biosocial position
    larix decidua
    Opis:
    The study presents the results of the MANOVA investigation on single tree growth space. The study included 48 larch trees in a dominant stand of different age classes growing in the fresh mixed coniferous (BMśw) and fresh mixed broadleaved (LMśw) forest habitats. The space occupied by a single tree was calculated for each larch tree as the volume of a cylinder with a height equal to the height of a tree, while the base area was determined from the average crown radius. Basic statistical characteristics were established. The MANOVA was performed to assess the statistical significance of the impact of forest habitat type, age and biosocial position of trees in a stand. A similar analysis was done for two basic measurement characteristics of trees – diameter at breast height and height.
    Źródło:
    Sylwan; 2010, 154, 11; 764-772
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eksperymentalne odnowienie debu bezszypulkowego [Quercus sessilis Ehrh.] w Kampinoskim Parku Narodowym
    Autorzy:
    Tarasiuk, S
    Powiązania:
    https://bibliotekanauki.pl/articles/812571.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    siedlisko boru mieszanego swiezego
    dab bezszypulkowy
    odnowienia lasu
    Quercus petraea
    starodrzew
    parki narodowe
    lesnictwo
    Kampinoski Park Narodowy
    odnowienia podokapowe
    drzewa lesne
    Źródło:
    Sylwan; 1999, 143, 09; 15-21
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka ekologiczna form aktualnego stanu żyzności siedlisk leśnych w aspekcie meliorowania regradacyjnego siedlisk zdegradowanych
    Ecological characterization of forms of present fertility condition of forest sites in the aspect of regrading amelioration of degraded sites
    Autorzy:
    Makosa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/816995.pdf
    Data publikacji:
    1991
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    siedliska lesne
    elementy skladowe
    charakterystyka ekologiczna
    zyznosc siedliska
    siedlisko lasu swiezego
    siedlisko boru swiezego
    siedlisko boru mieszanego swiezego
    degradacja siedliska
    Źródło:
    Sylwan; 1991, 135, 09
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cechy jakościowe podrostów dębowych rosnących pod osłoną drzewostanów sosnowych
    Quality traits of undergrowth oaks beneath the canopy of Scots pine stands
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Pewniak, B.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/985772.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany sosnowe
    siedlisko boru mieszanego
    siedlisko lasu mieszanego swiezego
    podrost
    dab
    Quercus
    cechy jakosciowe
    odnowienia podokapowe
    trunk quality
    crown quality
    vitality
    development trend
    trees with future potential
    Opis:
    Scots pine stands in central Poland are now seen to be experiencing dynamic development of lower layers formed by oaks. The under−canopy natural renewal taking place in this way is sometimes characterised by good silvicultural quality, and could therefore be taken advantage of in the process of stand conversion. The study assess the quality of existing undergrowth layers of oak present in older stands of Scots pine, most especially from the point of view of their suitability for subjection to further silvicultural measures. The research material was collected in 10 objects where site type was classified as mesic mixed coniferous site type (BMśw) as well as in 11 ones with mesic mixed broadleaved forest (LMśw) site type. In each site type, 2 or 3 stands were selected to typify undergrowth layers aged 15, 20, 25 or 30 years. Assessment of oak undergrowth trees was made on the basis of 4−point scale in case of trunk or crown quality and vitality, and on a 3−point scale when vitality and the development trend were concerned. Next we selected the trees with future potential characterised by the highest quality from the point of view of all studied traits. A further determination concerned the influence on the traits in these best trees of the oak understorey that was exerted by biometric features of both the sheltering Scots pine stand and the under−growth itself. The studied undergrowth oaks are of either very good or good quality. Around 90% of these young trees could be assigned to 1st or 2nd quality class with the respect of all of analysed traits. Furthermore, fertility of the site type was found not to have any influence on the quality of the young oaks. However, where the number of trees identified as having future potential is concerned, influence was demonstrated for density of trees in both stand and the undergrowth layer, as well as their height, breast−height diameter and basal area. Oaks forming the lower layer beneath Scots pine stands are thus characterised by good quality and growth trends, to the extent that this suggests allowing further growth to take place, with inclusion within the main stand or next generation.
    Źródło:
    Sylwan; 2018, 162, 04; 267-276
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cechy biometryczne podrostów dębowych pochodzenia naturalnego rosnących pod osłoną drzewostanów sosnowych
    Biometric features of oak advance-growth growing under Scots pine canopy
    Autorzy:
    Żybura, H.
    Pewniak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/989077.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany sosnowe
    sosna zwyczajna
    Pinus sylvestris
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    podrost
    dab
    Quercus
    cechy biometryczne
    odnowienia podokapowe
    scots pine
    oak
    biometric features
    canopy
    Opis:
    The objectives of the study was to investigate and compare the characteristics of oak advance−growth of various age present under Scots pine canopy and growing on the mesic mixed coniferous (BMśw) or mesic mixed deciduous (LMśw) forest site types. The study was conducted in Kolumna Forest District (central Poland) in 21 Scots pine stands ca. 90 years of age, and with a well−developed oak advance−growth. The study sites were divided into 4 groups depending on the age of oak: 15, 20, 25 or 30−years−old. The empirical data concerned trees frequency (per unit area), average breast height diameter, height and basal area. The dependence of these characteristics on type of the main stand and advance−growth was then determined by statistical analysis. Above all, an attempt was made to determine the impact of forest site type conditions on the characteristics of oaks advance−growth. Results show that oaks are present at the density that makes the possibility of the advance−growth development into the stand real. Trees in the upper storey are found to exert a great influence on the silvicultural value of advance−growth trees. In particular, the density of trees in the main stand is a feature found to affect greatly the layer of oak advance−growth.
    Źródło:
    Sylwan; 2017, 161, 06; 476-484
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biochemiczna aktywność gleb różnych siedlisk leśnych
    Biochemical soil activity of different forest site
    Autorzy:
    Olszowska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/989600.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gleboznawstwo lesne
    siedliska lesne
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    gleby lesne
    aktywnosc biochemiczna
    aktywnosc enzymatyczna
    wlasciwosci chemiczne
    forest site type
    enzymatic activity
    soil chemistry
    Opis:
    The aim of the study was to determine the enzymatic activity and chemical properties of soil in selected stands of different age classes on two forest site types: fresh mixed coniferous forest (BMśw) and fresh mixed deciduous forest (LMśw). The investigations were carried out in Nowe Ramuki Forest District in 2013−2015 located in the central part of Warmińsko−Mazurskie administration district Poland. In organic and humus horizons following parameters were described: acidity in 1M KCL, content of nitrogen, carbon and exchangeable alkaline cations (Na+, K+, Ca2+ and Mg2+) as well as hydrolytic acidity. Enzymatic investigation included the measurements of urease, asparaginase, acid phosphatase and dehydrogenase activity. Content of C and N, sum of base cations (S), hydrolytic acidity (Hh), cation exchange capacity (PWK), base saturation percentage were significantly higher in organic than humus horizon. Enzymatic activity was connected with the content of organic matter, what resulted in higher activity in organic than humus horizon independently of site type and stand age. The concentration of organic carbon (C), nitrogen, C/N ratio, hydrolytic acidity and cation exchange capacity was higher on BMśw than LMśw site type. Activity of urease, acid phosphatase and dehydrogenase was lower in soils of LMśw than BMśw site type. Lower enzymatic activity may suggest lower intensity of decaying process of organic matter in these soils. Significant correlations between enzymes and chemical soil parameters were found. Significant correlation between enzymatic activity and soil chemical properties shows that biochemical parameters can be used as indexes of their productivity. Investigation of biochemical reaction intensity can be complement to soil chemical studies usually used in forestry.
    Źródło:
    Sylwan; 2016, 160, 08; 666-673
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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