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    Wyświetlanie 1-3 z 3
    Tytuł:
    Wpływ jemioły (Viscum album) na jakość nasion sosny zwyczajnej (Pinus sylvestris)
    Influence of mistletoe (Viscum album) on the quality of Scots pine (Pinus sylvestris) seeds
    Autorzy:
    Jasiczek, N.
    Giertych, M.J.
    Suszka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/987164.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Nadlesnictwo Bolewice
    drzewostany nasienne
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    nasiona
    jakosc nasion
    kielkowanie nasion
    wielkosc szyszek
    produkcja nasion
    czynniki biotyczne
    polpasozyty
    jemiola
    Viscum album
    seed quality
    germination
    seed production
    semiparasite
    cone size
    Opis:
    Mistletoe is semiparasite adversely affecting the functioning of their hosts especially at water management level. So far, there have been no reports about the impact of mistletoe on seeds from any host. The aim of the work was to evaluate the effect of the presence of mistletoe on the quality of the seeds of Scots pine (Pinus sylvestris). Unopened cones from infected and uninfected trees were collected in April 2015 in the Excluded Seed Stand in Bolewice Forest District (52°2354.347N; 16°0501.978E). Measurements of cones and seeds were made. Some seeds were used for pot experiment, where the seedlings were planted from May to October 2015. On the second part of the seeds in the end of July and August germination tests were made. The size and mass of the cones, the number and weight of seeds, and the height and weight of the seedlings were lower for the material collected from the mistletoe trees. The differences were not large but statistically significant (tabs. 1 and 2). The results showed that mistletoe has a negative impact on the parameters of cones, seedlings and seeds quality.
    Źródło:
    Sylwan; 2017, 161, 07; 558-564
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność cech szyszek i nasion świerka pospolitego (Picea abies (L.) Karst) w zależności od ich lokalizacji w koronie drzewa
    Variability of the selected traits of Picea abies (L.) Karst. cones and seeds depending on their location in the crown
    Autorzy:
    Jastrzębowski, S.
    Kantorowicz, W.
    Ukalski, K.
    Klisz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/980287.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy gorskie
    swierk pospolity
    Picea abies
    szyszki swierku
    cechy jakosciowe
    nasiona
    jakosc nasion
    lokalizacja w koronie drzewa
    norway spruce
    seeds quality
    crown zone
    cone distribution
    mountain forests
    Opis:
    The objective of the study was to determine whether differences exist between the selected characteristics of Norway spruce cones and seeds depending on their location in the crown. The study was performed in two spruce tree stands growing under mountainous conditions (the Beskidy Mountains, southern Poland). In winter 2015, the cones were collected from 60 standing trees located in the two selected seed stands – Ujsoły and Rycerka. From each tree, the cones were collected from three crown zones: top, central and bottom differing in terms of light conditions. Two characteristics of the cones and six characteristics of the seeds were analysed. To determine quantitative and qualitative traits of seeds standard methods for seed testing were applied. Significant differences between the populations were determined for cone weight and fraction of full seeds, weight of 1000 seeds and germination capacity. The crown zones differed significantly in terms of fraction of cones in the parts of the crown and mass of one cone as well as weight of 1000 seeds, germination energy and germination capacity. Moreover, a significant intra−population variation was observed for a majority of the analysed characteristics (fraction of full seeds, weight of one cone, weight of 1000 seeds, germination energy, and germination capacity). However, no statistically significant interaction between population and crown zone was observed. A significantly lower contribution of cones in the bottom zone of the crown may affect the economic viability of the commercial harvest. On the other hand some of the important seeds traits (e.g. weight of 1000 seeds, germination energy and germination capacity) were significantly better in the bottom and central part of the crown than in the top zone. There are no justified circumstances (both qualitative and quantitative) to perform the cone harvest only from the top zone of the crown.
    Źródło:
    Sylwan; 2019, 163, 01; 3-12
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Masa oraz żywotność nasion olszy czarnej (Alnus glutinosa Gaertn.) na terenie Polski w latach 1995 - 2004
    Mass and viability of European alder [Alnus glutinosa Gaertn.] seeds in the area of Poland during 1995-2004
    Autorzy:
    Bodył, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016370.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    nasiona
    nasiennictwo
    lesnictwo
    zywotnosc nasion
    masa 1000 nasion
    olsza czarna
    jakosc
    zdolnosc kielkowania
    Alnus glutinosa
    drzewa lesne
    european alder
    seed testing
    quality of seeds
    Opis:
    Local Seed Testing Stations quarterly send a report to Forest Research Institute (FRI) referring to seed analysis results. The FRI prepares a summary from these data. On the basis of ten−year period of research one has discovered significant differentiations in mass and viability of European alder seeds (Alnus glutinosa Gaertn.) within years and among natural−forest regions.
    Źródło:
    Sylwan; 2007, 151, 05; 17-22
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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