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    Wyświetlanie 1-4 z 4
    Tytuł:
    Analysis of covariance of height of pine stands
    Analiza kowariancji wysokości drzew dla drzewostanu sosnowego
    Autorzy:
    Kazmierczak, K.
    Graczyk, M.
    Zawieja, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/9777.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
    Tematy:
    covariance analysis
    tree
    height
    pine stand
    Scotch pine
    Pinus sylvestris
    Źródło:
    Colloquium Biometricum; 2008, 38
    1896-7701
    Pojawia się w:
    Colloquium Biometricum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wound healing rate in oriental beech trees following logging damage
    Autorzy:
    Tavancar, F.
    Picchio, R.
    Lo Monaco, A.
    Nikooy, M.
    Venanzi, R.
    Bonyad, A.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/962357.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    fagus orientalis
    uneven-aged stand
    single-tree selection
    diameter
    growth
    height growth
    tree biosocial class
    Opis:
    Beech is the most important commercial species in the Caspian forests of Iran. Selective cutting and harvesting methods may adversely impact the quality of the residual trees, as the injuries make the trees prone to future disease, insect infestations or timber defects. Although attempts to better understand how wounds affect the residual trees have been made in many different contexts, there are still few investigations on uneven-aged forests. In this study the key objectives were to determine and model the healing rate for different wound parameters (width, length, and area of wound); to analyse the relationship between wound healing rate (WHR), tree diameter growth and tree height growth; to analyse the WHR in relation to wound position on the stem; and to analyse the relationship between WHR, width and area of wound in DBH classes and social classes, with the aim of enabling the prognosis of logging wounds. Wounded beech trees were examined immediately after selective logging and after a 5-year period. The WHR was 31.2 ±7.7 cm2 year-1. The wound width healing rate (18.4 ±3.4 mm·year-1) was significantly higher than the wound length healing rate (4.5 ±1.6 mm·year-1). Only 12% of wounds were completely closed after a 5-year period, and 15 years are necessary for the complete closure of 80% of total wounds. The ratio of wound area to stem area at wound height (RWS) showed a more pronounced effect on diameter than on height. Regression analysis showed that WHR was correlated negatively with wound area and width and positively with tree diameter growth, but no significant relationship was found between height growth and WHR parameters. The WHR was significantly higher at an upper position than at a lower one, and statistical tests showed that the tree vertical layering classes had a significant effect on WHR. Finally, it was shown that WHRs in upper-storey trees are significantly higher than in the middle and lower storeys.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2019, 62, 203
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relation between the height of Larix kaempferi and some climatic characteristics in Poland
    Autorzy:
    Filipiak, M
    Napierala-Filipiak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/41673.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Polska
    climate
    temperature precipitation
    acclimation
    Japanese larch
    Larix kaempferi
    exotic species
    woodland
    climatic zone
    height
    larch stand
    Opis:
    Japanese larch (Larix kaempferi Sarg.) is one of the most frequent exotic species in Polish woodlands. The basic object of research comprised 60 stands of the studied species, located mainly in the northern and western parts of Poland. The growth results for the studied species, evaluated on the basis of the average height (hg55), were compared with data describing the local climate and the stand location within the botanical and climatic zoning. The results confirm the opinion that the Japanese larch prefers a climate of maritime character and generally shows high degree of flexibility regarding its climatic requirements (very large differences between the growth conditions in the studied area and the country of origin). The dependence between the growth results and precipitation is however lower than expected. The most interesting results include the relatively clear connection between the height of the larch stands and the Degórski’s (1984) ‘floristic’ ‘K’ (continentality) index.
    Źródło:
    Dendrobiology; 2008, 60; 11-17
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of surface fire on radial and height growth of Pinus sylvestris L. in forest-steppe in Ukraine
    Autorzy:
    Koval, Iryna
    Sydorenko, Serhiy
    Powiązania:
    https://bibliotekanauki.pl/articles/2044108.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    meteorological characteristics
    height growth
    radial growth
    post-pyrogenic development of pine stand
    Pinus sylvestris L.
    percent of the late wood
    Opis:
    The article presents the results of the research on the peculiarity of response of Pinus sylvestris L. growth in height and diameter in young pine forest stand of the Left-Bank forest-steppe of Ukraine under the influence of surface fire that happened in May 2011. Forestry taxation, comparative ecology, standard dendrochronological methods were used. Response of trees was different for the height growth and the radial increment in the year of fire (2011). The radial growth got depressed in the year of fire; at the same time, the height of trees showed positive trend of growth against the background of favourable weather conditions. The growth in height was more ductile and completed its recovery to a particular level in 2014, unlike the radial growth, which recovered only in 2016. The relationships between radial growth on one side and stand sanitary state and height of bark char on the other were approximated by quadratic and cubic regression equations. Dynamics of pine growth depends on climatic factors also. Percentage of the late wood should be used to assess the condition of stands after fire. Research of post-pyrogenic development of forest ecosystems will allow more effective planning of forest management measures, and also allow the adjustment of the monitoring duration for pine forest stands damaged by fires.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 2; 123-134
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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