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    Wyświetlanie 1-4 z 4
    Tytuł:
    Drzewostanowa metoda określania uszkodzenia świerka
    Method of assessment the damage to Norway spruce stands
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016295.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    defoliacja
    uszkodzenia drzew
    wskaznik uszkodzenia drzew
    metoda drzewostanowa
    Picea abies
    lesnictwo
    kryteria oceny
    metody oceny
    swierk pospolity
    drzewa lesne
    methods of assessment the damage to stands
    norway spruce
    Opis:
    Paper presents two variants of the method of assessment the damage to the Norway spruce stands that were determined on the basis of the crown development. The first one is based on the tree's defoliation, the other – on the tree's damage index W that includes defoliation (feature A), condition of the tree−top (feature B) and tree's vitality (feature C). Mean defoliation or index W is used to determine one of the four classes of the stand damage. The accuracy of both variants was worked out and minimum number of sample trees required within assumed standard errors of assessed features. Alarming picture of Norway spruce stands in Polish Carpathians and Sudety Mountains appeared for the damaged stands prevail while there is no undamaged stands.
    Źródło:
    Sylwan; 2007, 151, 06; 24-33
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kryteria określania uszkodzenia świerka
    Criteria for assessment of the damage to Norway spruce
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016245.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    defoliacja
    uszkodzenia drzew
    stan wierzcholka drzewa
    zywotnosc
    Picea abies
    lesnictwo
    kryteria oceny
    swierk pospolity
    drzewa lesne
    criteria for assessment of the damage to trees
    defoliation
    vitality
    top condition
    norway spruce
    Opis:
    The paper presents the criteria for assessment of the damage to Norway spruce determined on the basis of its crown development. Three features were included: condition of the assimilation apparatus (feature A), condition of the tree−top (feature B) and tree vitality (feature C). Feature A is based on the defoliation. Feature B assesses the length of the last height increments and their branching models. Feature C includes the loss of branches in the middle part of the crown, the presence of branches of 2nd and higher orders as well as condition of proventive sprouts (developed from dormant buds). Determined criteria may be applied in the methods of assessment of the damage to stands and larger forest objects e.g. management region, forest region, nature−forest regions.
    Źródło:
    Sylwan; 2007, 151, 06; 12-23
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany zachodzące w lasach Beskidu Małego
    Changes occurring in the forests of the Beskid Maly Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979504.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gory
    Beskid Maly
    lasy gorskie
    drzewostany swierkowe
    rozpad drzewostanow
    struktura drzewostanu
    struktura gatunkowa
    struktura wiekowa
    pozyskiwanie drewna
    zlomy
    wywroty
    zagrozenia drzewostanow
    changes in species composition
    decrease in the proportion of spruce
    threat to forests
    Opis:
    Like in the Beskid Śląski and Żywiecki Mts., the dieback of Norway spruce stands takes place also in the Beskid Mały range. This process is clearly more intensive and occurs over a longer period of time. The conversion of these forests during the study period (2004−2016) resulted in a significant increase in the proportion of beech and fir as well as other, mostly deciduous tree species (tab. 1). The dieback of spruce forests is likely to continue, as the share of spruce in some forest complexes is still high. The age class structure of forests during the study period was found to have a negative effect on the stability and uniformity of forest growth – the young stands fraction was too low and decreased (tab. 3). The high average age of stands, which increased from 67 in 2007 to 71 years in 2016 was also unfavourable. The volume of harvested timber was rather high and approximated to the volume of allowable cut determined by the stand growth model (so−called model volume) (figs. 1, 2). In the Andrychów Forest District the harvested volume was significantly lower than the model volume, while in Jeleśnia and Bielsko districts it was significantly higher, which results from higher proportion of spruce in these regions. In the harvested timber structure, the share of wind−broken and wind fallen trees was about 10%, which is not high for the mountain area (fig. 3). The exception was in year 2005, when timber removals after the hurricane of November 2004 were estimated at more than 30%. In 2006−2008, the volume of deadwood was high and consisted mainly of spruce (fig. 4). Then the dieback of spruce forests decreased and was observed predominantly in the western and southern parts of the forest complex. The years 2013−2016 saw a high share of live trees in the harvested timber volume (over 80% of the model volume) (fig. 5). In some parts of the Beskid Mały forests, the harvest of live trees exceeded 300% of the model volume. Such high harvest is justified by the need of urgent silvicultural tasks to be carried out, especially stand conversion. The threat to the Beskid Mały forests from wind is high and remained at the same level throughout the study period – the threat measure Ms was ca. 33 (fig. 6). It is essential to lower the level of threat to these forests by, inter alia, increasing the area of young stands.
    Źródło:
    Sylwan; 2019, 163, 03; 237-247
    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
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