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    Wyświetlanie 1-4 z 4
    Tytuł:
    Fluorescencja chlorofilu igiel klonow jodlowych [Abies alba Mill.] w archiwach genetycznych zlokalizowanych na roznych wysokosciach nad poziomem morza w Karkonoskim Parku Narodowym
    Chlorophyll fluorescence of silver fir [Abies alba Mill.] clone needles in genetic archives located at different altitudes in the Karkonosze National Park
    Autorzy:
    Niemczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/46158.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Karkonoski Park Narodowy
    hodowla lasu
    drzewa lesne
    wysokosc nad poziomem morza
    jodla pospolita
    Abies alba
    klony
    igly jodlowe
    fluorescencja chlorofilu
    pomiary
    maksymalna wydajnosc kwantowa
    tlumienie niefotochemiczne
    tempo transportu elektronow
    Źródło:
    Leśne Prace Badawcze; 2009, 70, 3; 213-221
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tempo wzrostu wysokości i pierśnicy jodły pospolitej (Abies alba Mill.) w Beskidzie Niskim
    Height and diameter growth rates of silver fir (Abies alba Mill.) growing in Beskid Niski mountains
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Niemczyk, M.
    Łukaszewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989756.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    wzrost roslin
    wysokosc drzew
    piersnice drzew
    przyrost piersnicy
    przyrost wysokosci
    tempo wzrostu
    Beskid Niski
    height growth rate
    diameter growth rate
    spatial diversity of canopy layers
    physical age
    abies alba
    Opis:
    Silver fir is one of the main tree species of mountain and foothill forests in Poland that in optimal conditions forms pure stands with multi−layer structure. The study objective is to present differences in height and diameter growth rates of firs growing in upper stand layers and in the undergrowth. The research was conducted in 12 fir stands located in the Beskid Niski Mts. (southern Poland). In each stand height and diameter at breast height (dbh) were measured for 25 fir trees in order to develop a height curve. The first canopy layer included trees that were higher than ⅔ Hmax established from the height curve of the tree with the largest dbh. Height and diameter were measured on eight trees selected from the first canopy layer. An increment core was extracted at breast height in order to estimate the tree age. From the third canopy layer, which included trees higher than 2 m with dbh below 7 cm, five trees were selected. After cutting those trees, the length of the last ten branch whorls was measured. Five−year ring width measurements starting from the bark towards the pith were done at the stem cross−sections obtained at breast height. The number of rings was counted on remaining stumps. Height growth rate was defined as the height at the base age of 100 years (eq. 1). For the first canopy layer, the height growth rate was on average 31.8 m, while for the undergrowth it was 12.1 m. There was also large difference between diameter growth rate of the first stand canopy layer (55.7 cm) and undergrowth (18.3 cm). Both differences were significant at p=0.05. These discrepancies could result from low amount of light reaching the forest floor. The correlation between height and diameter growth rates and undergrowth tree age was negative in both cases. Long periods of shading result in smaller number of firs reaching the first canopy layer. Assuming that uneven−aged stand structure is optimal for that species, it should be characterized by a spatial variability (mosaic) of various canopy layers including even−aged patches with sparse canopy closure as well as gaps where fir regeneration will be initiated having favorable growth conditions.
    Źródło:
    Sylwan; 2015, 159, 10; 804-812
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzorzec rozkładu pierśnic drzew wielowarstwowego drzewostanu jodłowego Gór Świętokrzyskich
    Pattern of breast height diameter distribution in a multilayer silver fir stand in the Swietokrzyskie Mountains
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Łukaszewicz, J.
    Niemczyk, M.
    Wrzesiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989331.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Gory Swietokrzyskie
    drzewostany jodlowe
    jodla pospolita
    Abies alba
    rozklad piersnic
    metoda BDq
    diameter distribution
    abies alba
    bdq method
    Opis:
    In Poland, the majority of silver fir stands is characterised by a single−layer stand structure. The current silvicultural activities aim at obtaining multilayer stands, which requires a clearer definition of the structure, and more precisely, a better knowledge of the pattern of diameters at breast height (DBH) distribution. The aim of the research was to develop a pattern of DBH distribution of trees in a multilayer silver fir stand in the Świętokrzyskie Mountains (central Poland) using the BDq method, through the mathematical determination of function parameters, including the productive capacity of the habitat. The application of this pattern will allow the selection of the management methods aimed to obtain and then maintain model stands with a different layer structure. The research was based on the empirical material collected in 56 stands that were characterized by both a single− and a multi−layered structure. They grew in coniferous forest habitats, mostly in the upland mixed coniferous forest, upland mixed deciduous forest and upland deciduous forest or mountain forest. One big (up to 1 ha) or 3−5 smaller (0.04 ha) sample plots were established in each stand in which diameters at breast height of all trees and heights of usually 25 trees, selected from the entire range of diameters, were measured. These were used to determine the height growth curve equation coefficients and then the height of each tree. For each stand the basal area was calculated and a graph for DBH distribution was prepared. Site index was established using the original empirical equation. In order to develop a model for multilayer fir stands, individual parameters of the equation 5, such as the basal area (B), the target diameter at breast height (D) and the coefficient q were to be determined using the BDq method. Taking into consideration only stands with one−tailed DBH, individual parameters of the function were found to be associated with site index. Empirical equations were developed for the determination of B and D, and, based on the DBH distribution graphs, coefficient q associated with site index was also calculated (tab.). The developed DBH distribution pattern is a mathematical description of the target fir stand. When the value of stand parameters approaches those of the model stand, it should be managed using the shelterwood cutting system, which results from the spatial variation in the stand height structure, and consequently from the need for different silvicultural treatments in different stand fragments.
    Źródło:
    Sylwan; 2016, 160, 09; 741-750
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie się przyrostu grubości jodeł z Gór Świętokrzyskich
    Radial increment of silver fir from the Swietokrzyskie Mts.
    Autorzy:
    Bruchwald, A
    Dmyterko, E.
    Bijak, S.
    Łukaszewicz, J.
    Niemczyk, M.
    Wrzesiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989406.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    sloje przyrostu rocznego
    analiza dendrochronologiczna
    Gory Swietokrzyskie
    drzewostany jodlowe
    jodla pospolita
    Abies alba
    przyrost drzew
    przyrost grubosci
    przyrosty radialne
    czynniki srodowiska
    czynniki klimatyczne
    zanieczyszczenia przemyslowe
    abies alba mill.
    tree−rings
    increment reduction
    increment release
    disturbances
    Opis:
    The paper presents the dendrochronological analysis of silver firs (Abies alba Mill.) growing in the canopy layer of the forest stands. We searched for the similarities in the rhythm of radial growth of studied trees and we analysed the response of these stands to the increment disturbances related to the occurrence of adverse climatic factors and the pressure from industrial pollution. The research material was collected in 30 pure and uneven−aged silver fir stands located in the Świetokrzyskie Mountains (central Poland). We investigated the effect of age of the stands and the conditions for their growth (location, forest habitat type) on an average tree−ring width. In order to detect similarities in the rhythm of radial growth of the surveyed stands, we grouped the raw chronologies by the means of the cluster analysis, using Ward's agglomeration procedure with 1−r distance (r – Pearson correlation coefficient). We assessed the incremental response of the investigated stands to the disturbances (situations of significantly reduced radial growth) using indicators of resistance, recovery and resilience proposed by Lloret et al. [2011]. We also studied the influence of the stand age and the forest habitat type on the response of analysed for stands to the detected disturbances. The shortest chronology consisted of 94 tree−rings, while the longest one of 137. Average length of the obtained silver fir chronologies was 119 years. Older fir stands characterised with narrower rings (r=–0.451, p=0.012). Neither the location, nor the forest habitat type are the factors determining the similarity of the rhythm of radial growth of silver firs from the Świętokrzyskie Mountains (p=0.243 and p=0.967 respectively). The extreme climatic conditions responsible for the majority of the short−term (one−year−long) incremental depressions are the factor of regional importance, which affects the growth of investigated trees. Older stands characterized with better possibilities of increment recovery after the disturbance than younger stands (p<0.001), which may be a result of the production of secondary crowns. No consistent differences in the indices of resistance and resilience were found among analysed stands.
    Źródło:
    Sylwan; 2016, 160, 11; 893-904
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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