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    Wyświetlanie 1-4 z 4
    Tytuł:
    Osobnicze zroznicowanie jodly pospolitej [Abies alba Mill.] z rezerwatu Jata wyrazone w cechach morfologii i anatomii igiel
    Silver fir [Abies alba Mill.] differentiation from Jata Reserve as expressed by morphological and anatomical features of needles
    Autorzy:
    Pawlaczyk, E.M.
    Bobowicz, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/45915.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    budowa anatomiczna
    igly
    jodla pospolita
    zmiennosc cech
    rezerwat Jata
    Abies alba
    rezerwaty przyrody
    cechy morfologiczne
    lesnictwo
    zmiennosc osobnicza
    drzewa lesne
    Źródło:
    Leśne Prace Badawcze; 2008, 69, 3; 243-253
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność nasion Pinus sylvestris L. z uwzględnieniem barwy okrywy nasiennej
    Variability of Pinus sylvestris L. seeds including seed coat colour
    Autorzy:
    Banach, J.
    Skrzyszewska, K.
    Panczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2142619.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    nasiennictwo
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    nasiona
    zmiennosc cech
    czystosc nasion
    zywotnosc nasion
    masa 1000 nasion
    okrywa nasienna
    zmiennosc barwy
    program WinSeedle
    Opis:
    The aim of this work was to compare the variability of Scots pine Pinus sylvestris L. seeds collected in three forest sites in the Radomsko Forest District. This comparison was mainly based on viability and weight of 1000 seeds, which was then used to calculate seed value for each sample. Furthermore, seed size was assessed by measuring their length, width and area, using the WinSeedle software. All evaluated samples belonged to viability class I. Seeds originating from the Bąkowa Góra forest range were characterized by the highest weight, best viability and the largest size. In the next stage of our research, we performed an analysis of variability parameters taking the colour of the seed coat into consideration. For this analysis, the seeds were divided into three colour groups (fawn, brown, black) and their vitality and weight were assessed separately. The share of fawn seeds was 9.4%, brown 39.6% and black 50.9%. The weight of 1000 seeds and seed size parameters of fawn seeds were slightly higher than those of the black and brown seeds. The fawn and black seeds belonged to vitality class I, while brown seeds belonged to vitality class II. Despite the observed variability, seeds belonging to different colour groups did not show statistically significant differences in other measured parameters. The factor with the greatest impact on the seed parameters was the site of origin, which differed in their forest site type. Larger and heavier seeds came from the broadleaved forest site compared to the coniferous forest sites.
    Źródło:
    Leśne Prace Badawcze; 2021, 82, 1; 15-22
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność cech wiązu górskiego Ulmus glabra Huds. rosnącego na uprawie zachowawczej ex situ w Nadleśnictwie Oleszyce
    Variability of wych elm Ulmus glabra Huds. characteristics growing on an ex situ conservative plantation in the Oleszyce Forest District
    Autorzy:
    Banach, J.
    Skrzyszewska, K.
    Puk, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2142618.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    ochrona ex situ
    uprawa zachowawcza
    wiaz gorski
    Ulmus glabra
    zmiennosc cech
    liscie
    morfotypy
    przezywalnosc roslin
    wysokosc drzew
    Opis:
    The aim of this work was to investigate the variability of different features in wych elm Ulmus glabra Huds. populations growing in the conservative plantation in the Kolonia Forest Subdistrict (Oleszyce Forest District). We examined the survival rate, height, and spring flushing of the elm trees as well as the occurrence of two leaf morphotypes after ten years since the establishment of the plantation. Statistically significant differences were found between the studied populations in terms of survival and height growth, while no difference was observed for spring flushing, which may be due to the close proximity in which the tested populations grow. The highest rate of survival was observed in the Bircza 33a population (87.3%), whereas the Lutowiska 40b population grew tallest (344.3 cm). Elms with leaves typical of the U. glabra ssp. montana (morphotype A – 84%) dominated the stand, while elms with leaves characteristic for the U. glabra ssp. glabra (morphotype B) were a minority with only 4%. However, within the Lutowiska 137g population, the share of morphotype B was as high as 25%
    Źródło:
    Leśne Prace Badawcze; 2021, 82, 1; 23-30
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Promieniowa zmienność właściwości drewna sosny zwyczajnej (Pinus sylvestris L.) wyrosłej na gruntach porolnych
    Radial variation in the wood properties of Scots pine (Pinus sylvestris L.) grown on former agricultural soil
    Autorzy:
    Tomczak, A.
    Jelonek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1339968.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    drewno sosnowe
    gestosc drewna
    gestosc umowna
    wytrzymalosc na sciskanie wzdluz wlokien
    wytrzymalosc na zginanie statyczne
    zmiennosc cech
    czynniki siedliska
    grunty porolne
    basic density
    static bending strength
    compressive strength along fibers
    Opis:
    The soil of former farmland greatly differs from forest soil, and significantly influences tree growth and development compared with other site factors. The effect may also be reflected indirectly in radial variability of wood. This study compared radial variation of wood density, compressive strength along the grain and static bending strength of wood of Scots pine trees growing on former farmland and forest soils. The analyses were conducted in eight mature pine stands. On the basis of the stand description, four stands were classified as growing on forest soil (L) and four as growing on former farmland soil (P). A total of 24 model trees were selected, twelve on each soil type. Analyses of wood properties were conducted along four axes from the cross sectional radius of the treesat breast height. Our analyses showed that radial variation in wood properties of Scots pine (from selected locations in Poland) growing on former farmland is similar to the variation among the control trees growing on forest soils. In both groups of trees, the lowest density and the lowest strength were in the pith (juvenile) zone. Wood with the highest density and greatest strength was located in the central part of the radius. Wood of Scots pine trees growing on former farmland soils in comparison to that of trees growing on forest soil was characterised by a statistically lower basic density, lower compressive strength along the grain and static bending strength.
    Źródło:
    Leśne Prace Badawcze; 2013, 74, 2; 171-177
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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