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Wyszukujesz frazę "michalec, Z." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Związek typu ugałęzienia świerka pospolitego (Picea abies (L.) Karst.) z jakością surowca drzewnego
    Relationships between Norway spruce [Picea abies [L.] Karst.] branching type and timber
    Autorzy:
    Michalec, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015618.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    typ ugalezienia
    drewno swierkowe
    Picea abies
    lesnictwo
    jakosc
    wady drewna
    swierk pospolity
    drzewa lesne
    norway spruce
    branching type
    timber quality
    wood defects
    Opis:
    As there are different views concerning the relationship between branching type and timber quality, the present paper attempts to evaluate this relationship. The studies were carried out on 32 sample plots located within the boundaries of two natural ranges of Norway spruce in Poland: north−eastern and south−western. The selected trees were examined for the type of branching, height and diameter at breast height, timber quality, size classes or groups in a butt−end section, and kinds or varieties of wood defects having an effect on timber grade classification. The analyses did not show any clear relationship between branching type and timber quality of Norway spruce.
    Źródło:
    Sylwan; 2008, 152, 06; 33-43
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) pochodzącego z drzewostanów rosnących na różnych siedliskowych typach lasu
    Variability of selected features of macrostructure and density of Norway spruce wood (Picea abies (L.) Karst.) from stands growing in different forest habitats
    Autorzy:
    Michalec, K.
    Wasik, R.
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979499.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany rebne
    swierk pospolity
    Picea abies
    drewno swierkowe
    makrostruktura
    sloje przyrostu rocznego
    szerokosc
    gestosc drewna
    czynniki siedliska
    typy siedliskowe lasu
    common beech
    provenance
    variability
    silvicultural value
    Opis:
    This paper presents the genetic variability in the growth parameters and morphological traits, as well as the silvicultural quality of progeny of 23 European beech (Fagus sylvatica L.) provenances from south−eastern Poland. The research was conducted on the experimental plot established in the Łosie Forest District in spring 2006. After 10 years, during the spring and autumn, we determined and measured the spring phenology and survival rate, the diameter at breast height (dbh), the tree height, and the straightness of trunk. The results obtained point out the considerable variability of analysed features, both within and between different beech populations (tab.). Highest and lowest survival rates are noted for the beeches from Lutowiska and Leżajsk (populations 451 and 461), respectively (fig. 2). Lowest mean height and dbh were achieved by beeches from Bircza (453), while the tallest and broadest trees were from the Kielce population (390) (fig. 3−4). The overall silvicultural assessment based on survival, height, dbh, spring phenological phases and straightness of the trunk revealed that the most valuable populations of beech are those originating from Kielce (390), Bircza (454), Strzyżów (459), Lesko (452), Rymanów (457) and Lutowiska (451). In turn, the analysis resulted in least favourable assessments for beeches from Bircza (453) and Gromnik (362). Thus, we confirmed also that trees of local origin are not always best−adapted to (and do not always grow best in) the place they originate from. The obtained results are highly relevant from the principles of creating the seed source regions for beech in Poland, as the proper selection of a population for the given place of growth may yield benefits for forest ecology and management.
    Źródło:
    Sylwan; 2019, 163, 03; 188-197
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) z regla dolnego i górnego
    Variability of selected macrostructural features and density of Picea abies (L.) Karst. wood from lower and upper subalpine forest zones
    Autorzy:
    Michalec, K.
    Wąsik, R.
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989498.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wysokosc nad poziomem morza
    lesnictwo
    lasy gorskie
    regiel gorny
    regiel dolny
    drzewa lesne
    swierk pospolity
    Picea abies
    drewno swierkowe
    drewno pozne
    gestosc drewna
    sloje przyrostu rocznego
    szerokosc
    czynniki siedliska
    tree−ring width
    latewood share
    height above mean sea level
    Opis:
    The paper compares the properties of Norway spruce (Picea abies (L.) Karst.) wood from stands growing in the lower and upper subalpine forest zone in terms of the tree−ring width, the share of latewood and the wood density. The investigation concerned material originating from plots established within the boundaries of the south−western incidence of spruce in Poland. Plots were located in the Sudety Mts. and in the Carpathians (tab. 1). On each plot fifteen Norway spruces were chosen and increment cores were sampled using the Pressler borer. The surface of the cores was smoothed and the tree−ring width was measured. The latewood zones were determined and the share of latewood was calculated. Then, the cores were divided into 2 cm sections, for which the relative wood density was determined. Tree−rings were wider in trees growing in the lower when compared with those from the upper subalpine forest zone (tab. 2). Weak negative correlation was revealed between the elevation and the tree−ring width (r=–0.308). The latewood share was slightly higher in trees from the upper than those from the lower subalpine forest zone (tab. 2). However, no statistically significant correlation between the latewood share and elevation was recorded. The wood density was slightly lower in trees from the lower than those from the upper subalpine forest zone (tab. 2), but the difference was not statistically significant. The correlation between the wood density and the elevation turned out to be insignificant.
    Źródło:
    Sylwan; 2016, 160, 10; 855-860
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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