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    Tytuł:
    Związek wysokości z wybranymi cechami korony czteroletniej brzozy brodawkowatej (Betula pendula Roth)
    The relationship between height and crown characteristics of four-year-old common birch (Betula pendula Roth)
    Autorzy:
    Klepacki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292448.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    brzoza brodawkowata
    Betula pendula
    wysokosc drzew
    korony drzew
    szerokosc korony
    dlugosc korony
    przestrzen wzrostu
    korelacja cech
    tree height
    crown width
    crown length
    growth space
    common birch
    forest culture
    Opis:
    This paper presents the results of an analysis on characteristics of birch crowns (Betula pendula Roth) in relation to measures of the growth space occupied by a single tree at a young age. It also presents the relationships between the seedling height and certain crown characteristics. The study focused on four-year-old common birches growing in four different areas in the Elk Forest District in either fresh mixed coniferous or broadleaved forest. The measurements conducted on the chosen trees were used to calculate their crown characteristics such as crown diameter, length, height to the crown base, relative length and spread. They were also used to determine the growth characteristics of a single tree’s growth space, such as the crown area projected onto the ground, single tree space and the percentage use of unit area. Furthermore, fresh and dry leaf mass was determined. The birches growing in the fresh mixed coniferous forest reached an average height of 1.30 m, whereas in the fresh mixed broadleaved forest, the height of the trees was lower and amounted to 0.67 m. 95% of the trees had crown diameters of 0.57 m to 0.74 m in the fresh mixed coniferous forest, but only 0.19 m to 0.25 m in the fresh mixed broadleaved forest. The average lengths of the crowns in the fresh mixed coniferous and broadleaved forests amounted to 0.97 m and 0.37 m respectively. The author shows that there is a statistically significant correlation between the seedling height and the other examined characteristics. The best correlation was found between the height and the length of the crown (r=0.9858) for birches growing in the fresh mixed coniferous forest and between the height and single tree space (r=0.8468) for birches growing in the fresh mixed broadleaved forest.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie bieżącego przyrostu sosen w trzech klasach wieku
    The current growth increment of pine tree stands comprising three different age classes
    Autorzy:
    Kaźmierczak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1339817.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    dendrometria
    drzewa lesne
    klasy wieku
    klasy Krafta
    drzewostany I klasy wieku
    drzewostany II klasy wieku
    drzewostany III klasy wieku
    sosna zwyczajna
    Pinus sylvestris
    przyrost drzew
    przyrost biezacy
    przyrost wysokosci
    przyrost piersnicy
    przyrost piersnicowego pola przekroju
    przyrost miazszosci
    height increment
    dbh increment
    basal area increment
    volume increment
    growth space
    crown
    age
    biosocial position
    Opis:
    The study presents the results of an analysis of the pine tree growth increments (height increment, dbh increment, basal area increment and volume increment) for a 5-year period. The study involved Scots pine trees of Kraft's class 1, 2 and 3 (dominant stand) in stands of different age classes (II, III, V) growing in fresh mixed coniferous (BMoew) and fresh coniferous (Boew) forest habitats. The multivariate analysis of variance was performed to assess the statistical significance of age and dominance of trees within a stand on their increment. The dominance position was classified for each tree using Kraft's criteria. The following characteristics were also measured: dbh of the trunk in two directions (N-S and W-E), and crown projection area on the basis of the characteristic tree crown points, projected using of a crown projector, characteristic points in tree crowns (7 to 14 on average). The actual height was determined after trees were felled. The following measurements of the single tree growing space were selected and determined: crown projection area – pk (m2), crown diameter – dk (m), Seebach's growth space number – dk / d1. 3 , crown projection area to basal area ratio –d d k 2 1 3 / 2. , crown deflection coefficient –d h k / , single tree space ppd=pk·h (m3). We assessed the strength of the relationships between tree growth parameters and tree growth space, crown length, relative crown length and slenderness. Both the age and dominance position of trees within the stand affected the growth increments. The strongest correlation among measured traits was between the 5-year volume increment and decreasing slenderness.
    Źródło:
    Leśne Prace Badawcze; 2013, 74, 2; 93-100
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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