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    Wyświetlanie 1-2 z 2
    Tytuł:
    Reakcja przyrostowa dębu na antropogeniczne zmiany warunków siedliskowych
    The growth response of oak to the anthropogenic changes in the habitat conditions
    Autorzy:
    Cieśla, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1012517.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    warunki siedliskowe
    dolina Odry
    drzewostany debowe
    rzeka Odra
    Quercus robur
    poziom wod
    zmiany antropogeniczne
    lesnictwo
    dab szypulkowy
    przyrost drzew
    drzewa lesne
    quercus robur
    growth response
    habitat conditions
    Opis:
    The growth response of oak to anthropogenically−induced changes in the environmental conditions was analysed in four habitats and three time intervals distinguished on the basis of fluvial water levels and the time of dam construction in Brzeg Dolny. The obtained results indicate that the conditions of growth in the examined stands prior to dam construction did not differ between individual habitats. Immediately after dam completion, the growth conditions deteriorated, so the growth response of oak considerably differed between the habitats. The growth conditions in the last period under analysis established and the diameter growth of trees in habitat IV again attained the status comparable to that from before the occurrence of a stress factor. Avoidance of any rapid changes in water management of forest habitats is the most important factor conditioning further forest management in the given area.
    Źródło:
    Sylwan; 2008, 152, 07; 19-28
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ więźby sadzenia na wzrost i przeżywalność sosny zwyczajnej w okresie około 40 lat od założenia uprawy w zróżnicowanych warunkach siedliskowych
    The influence of plant spacing on growth and survival of Scots pine in various habitats during a 40 year period since stand establishment
    Autorzy:
    Gil, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1317297.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    uprawy lesne
    drzewa lesne
    wiezba drzew
    wiezba poczatkowa
    sosna zwyczajna
    Pinus sylvestris
    wzrost roslin
    przezywalnosc
    warunki siedliskowe
    Scots pine
    plant spacing
    initial density
    survival of trees
    trees’ growth
    habitat conditions
    Opis:
    The aim of this research was to characterise the influence of plant spacing on the survival and growth of pines in dry and fresh coniferous forest habitats after almost 40 years since stand establishment. In this study, we compared seven types of spacing, including square, rectangular and triangular configurations, with initial densities ranging from 6944 units/ha to 15 625 units/ha. The research covered two sites where no tending interventions of selective character were performed throughout the growth period. We found that habitat conditions had an influence on tree survival as well as growth in thickness and height in the pine forest stands. In the less fertile habitat, where competition between trees was less intense, about 1,5 to 2 times more trees survived than in the more fertile habitat. Pines growing in the fresh coniferous forest were taller and had substantially larger diameter breast heights (dbh) in comparison to pines of the dry coniferous forest. Additionally, habitat conditions had an influence on the spacing effect correctness of the analysed features. In the poorer habitat this influence was stronger, which showed in a greater differentiation of the analysed parameters as compared to the more fertile habitat. Average dbh values of all trees on the Płock surface increased with decreasing initial density and ranged from 8,24 cm in variant A (15 625 units/ha) to 9,79 cm in variant C (6944 units/ha). On the Łąck surface, trees growing at a lower density (variants C and E) were significantly thicker than trees growing at densities between10 000 units/ha and 15 625 units/ha (spacing variants A, B, F, G). Furthermore, our results showed a significant influence of habitat conditions and plant spacing on the thickness of pines belonging to the 1st biosocial class. Moreover, we found a positive influence of triangular-shaped spacing on the trees' thickness increment in the fresh coniferous forest, which confirms reports from other authors. Hence, we can deduce that triangular spacing enables trees to make better use of their surrounding space which positively impacts on their growth parameters. Based on these results, we can conclude that, in pine forests, there is a significant influence of habitat conditions on tree survival and growth in thickness and height. This study also showed significant differences between the types of plant spacing and their effect on pine shafts in the II age class. However, a relationship between height growth rate and initial density was not observed. In both of the investigated habitats, the highest trees were observed at densities around 11 500 units/ha with triangular spacing enhancing this effect.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 2; 117-125
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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