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    Wyświetlanie 1-5 z 5
    Tytuł:
    Main forestry and management indices of pine (Pinus sylvestris L.) stands involving beech (Fagus sylvatica L.) in composition of Ukrainian Roztochchia
    Autorzy:
    Myklush, Yuriy
    Myklush, Stepan
    Havryliuk, Serhii
    Savchyn, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/2041218.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    forest typology
    site conditions
    pine stands
    Pinus sylvestris L.
    beech stands
    Fagus sylvatica L.
    tree species composition
    Opis:
    As of 2019, the total area of forest stands with the varying proportion of Scots pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) in composition on the Ukrainian Roztochchia was 11,251.3 ha and the area of pine stands involving European beech in composition was 6879.5 ha. Pine stands involving beech in composition are formed on the fresh, moist and boggy relatively pure and relatively rich soil condition. Pine forest stands (average share of pine exceeds 56%), which include beech in composition occupy more than 80% of the total area of interest. Mature and overmature forest stands dominate most of the landscape. More than 85% of stands are characterized by an average relative completeness. Undergrowth of deciduous tree species, which is mainly formed by European beech or hornbeam (Carpinus betulus L.) and rarely by common oak (Quercus robur L.) or sycamore maple (Acer pseudoplatanus), is available under a canopy of middle-aged, ripening and mature stands. The study points to the need to rethink forest management approaches and eventually to use such methods of forest cuttings that ensure natural regeneration not only of a European beech and common oak, but primarily of a pine. The practice of creating pine plantations in such conditions favourable for its growth and development should be used only in those cases when it is impossible to achieve natural regeneration of pine.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 2; 81-87
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long-term impact of selection cutting management on frequency of stem deformity in mixed beech forests of northern Iran
    Autorzy:
    Tavankar, Farzam
    Nikooy, Mehrdad
    Lo Monaco, Angela
    Picchio, Rodolfo
    Powiązania:
    https://bibliotekanauki.pl/articles/2010794.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    stem form
    stem deformity indices
    log defects
    mixed beech stands
    silviculture effect
    statistical quality control
    SQC
    Opis:
    The aim of this study was to evaluate the long-term effect of selection cutting management on the stem quality of the trees remaining in the forest. For this purpose, three parcels managed for three decades by selection cutting were selected as managed stands (MP), and two protected parcels without tree felling as control stands (PP). First, the frequency of deformed stems in each parcel was determined for a circular 1000 m2 area of each plot by systematic sampling of 100 m × 100 m grid sections, and then a stem deformity index was estimated for each of the deformed stems. The results showed that the frequency of stem deformity in MP (6.5%) was significantly lower than in PP (20.7%) (p < 0.01). In addition, the frequency of all types of stem deformities in MP was significantly lower than in PP. Furthermore, selection cutting management reduced the indices of twisting, decay, conicity, forking, and ellipticity by 58.4%, 53.9%, 34.7%, 8.4% and 6.8%, respectively. The results for the correlation between frequency of stem deformity and tree diameter at breast height (dbh) showed that the curves followed a parabolic shape in both MP (r = 0.83) and PP (r = 0.80), where the frequency of deformed stems decreased with increasing dbh (up to 75 cm in MP, and up to 65 cm in PP), and then increased with larger dbh. Selection cutting management, regardless of tree species, improved the stem form. Decay accounted for a high proportion (24.1%) of the total deformity in MP, mainly due to logging damage. Overall, the results of this study show that selective management has been successful in improving the quality of tree boles in the studied mixed beech stands. Regular and long-term stand monitoring and statistical quality control (SQC) may be a good approach to aligning ecological and economic goals in forest management.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2021, 64, 207; 5-26
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie dynamiki procesów lasotwórczych w buczynach bieszczadzkich w zależności od wystawy i wzniesienia
    Variability of the dynamics of forest development processes in the Bieszczady beech forests in relation to exposition and altitude
    Autorzy:
    Kucharzyk, S.
    Sugiero, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016208.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany bukowe
    sklad gatunkowy
    ekspozycja
    Bieszczadzki Park Narodowy
    wysokosc nad poziomem morza
    parki narodowe
    lesnictwo
    przyrost drzewostanu
    altitude
    exposition
    volume growth
    ingrowth
    loss
    beech stands
    bieszczady national park
    Opis:
    The paper discusses the variability of the dynamics of volume growth, ingrowth and loss in the beech stands in the younger optimal phase of development. The material collected from the permanent circular sample plots established in the Bieszczady National Park (BNP) was classified into four groups relating to their location (elevation of up to and above 1000 m a.s.l and exposition: northern and southern). A significant decline in volume growth was found at higher altitudes and in northern expositions. There were no statistically significant differences in volume ingrowth and loss in relation to the analysed topographic factors.
    Źródło:
    Sylwan; 2007, 151, 07; 29-38
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model wzrostu wysokości buków rosnących w drugim piętrze drzewostanów bukowo-sosnowych
    Height growth model for beech growing in the lower storey of beech-pine stands
    Autorzy:
    Dudzińska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1007387.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany bukowo-sosnowe
    drzewostany dwupietrowe
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    wzrost roslin
    modele wzrostu
    height growth
    beech
    two−storied stand
    fagus sylvatica−pinus sylvestris l. stands
    underplanting
    empirical equations
    Opis:
    The study was based on the empirical material collected from 12 beech−pine stands located in the territory of the Miłomłyn (6 plots) and Stare Jabłonki (6 plots) forest districts. On the basis of the collected material, a height growth model was developed for the beech growing in the lower storey of pine stands. The developed functions can be used, inter alia, for the characterisation of top−height growth with stand age, development of a network of site indices, as well as in the studies on the height growth rate.
    Źródło:
    Sylwan; 2012, 156, 05; 343-348
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kryteria wieku dojrzałości drzewostanów do odnowienia
    The criteria of maturity age of a stand to regenerate
    Autorzy:
    Głaz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/973276.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Pinus
    Abies
    Picea
    buk
    Quercus
    Fagus
    drzewostany
    sosna
    świerk
    jodła
    dąb
    drzewa leśne
    leśnictwo
    wiek dojrzałości od odnowienia
    stands with natural regeneration
    maturity age of a stand to regenerate
    pine
    spruce
    fir
    beech
    oak
    Opis:
    Stand characteristics were analysed for the occurrence of regrowth with a species matching the dominant species of a stand. The analysis covered: stand age, stocking, degree of shelter (the sum of stocking plus the percentage of the shrub layer cover), dbh basal area, type and the dominant species of the vegetation cover. The obtained results were considered as preliminary criteria of the maturity age for regeneration.
    Źródło:
    Sylwan; 2003, 147, 04; 69-70
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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