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Wyszukujesz frazę "experimental plots" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    The "Schwappachs Permanent Plots" forest database: an announcement
    Autorzy:
    Wirowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1954630.pdf
    Data publikacji:
    2003
    Wydawca:
    Politechnika Gdańska
    Tematy:
    forest experimental plots
    internet database
    characteristics of stand
    Opis:
    Experiments in the field of dendrology have been made for many years now. Current researchers, working on these plots, are the forth generation of foresters (two German and two Polish). They have created a large and important database for future forest research.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 2; 300
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction of Alien Tree Species and Its Influence on Floristical Composition and Vegetation Structure of Acidophilous Oak Forests: the Experimental Plots in the Zielonka Forest
    Autorzy:
    Ratyńska, Halina
    Grodzki, Marian
    Waldon, Barbara
    Wachowiak, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/764977.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    experimental plots
    alien tree species
    flora
    the Zielonka Forest
    Opis:
    In 1879 Schwappach first established 54 experimental forest plots on habitat of acidophilous oak forest Calamagrostio-Quercetum in the Zielonka Forest near Poznań, on which 20 exotic tree species were cultivated. Until this day 32 of the mentioned forest sites have been preserved and today only 9 species are present there. The aim of the study was to determine actual condition of the experimental plots, a description of their flora and vegetation, as well as a comparison with other test plots situated in the direct neighbourhood. Basing on 63 phytosociological relevés, an influence of exotic species plantings on the structure of vegetation and local biodiversity was assessed. Floristic richness of both experimental plots (88 species), as well as their direct neighbourhood (68) was recognised, along with the geographical-historical groups spectrum and species affiliation to phytosociological classes.
    Źródło:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2011, 7; 177-190
    1730-2366
    2083-8484
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wielkości rozbryzgu gleby na stoku pogórskim (Karpaty fliszowe, zlewnia Bystrzanki)
    Autorzy:
    Kijowska-Strugała, Małgorzata
    Kiszka, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/763095.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    splash, runoff, experimental plots, black fallow, meadows, foothill slope, Bystrzanka catchment
    rozbryzg, spływ powierzchniowy, eksperymentalne poletka, czarny ugór, łąka, stok pogórski, zlewnia Bystrzanki
    Opis:
    The article presents the results of the splash on the experimental plots on the foothill slope (with gradient 11°) with a black fallow and meadows and also plots on the foodplain with black fallow. The study was based on funnels method. The analysis of the results of research conducted from May to August 2012 showed that the size of the splash mainly depends on the kinetic energy of rain and gradient. Moreover, the splash on black fallow exceeds even 95 times the splash in the plots with meadow and 20 times in the floodplain plots without vegetation. Soil particles on the slope are moved to a maximum height of 40 cm down the slope and about 30 cm up the slope, mainly during high intensity rainfall. Furthermore, the sand grains are more easily thrown by splash than clay material.
    Artykuł nie zawiera abstraktu w jezyku polskim.
    Źródło:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia; 2014, 69, 2
    0137-1983
    Pojawia się w:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ metod trzebieży na wskaźniki przewagi konkurencyjnej drzew dorodnych w jednowiekowych drzewostanach sosnowych II i III klasy wieku
    The influence of different thinning methods on dominance coefficients of future crop trees in even-aged Scots pine stands
    Autorzy:
    Zachara, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1316012.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany sosnowe
    drzewostany jednowiekowe
    klasy wieku
    drzewostany II klasy wieku
    drzewostany III klasy wieku
    trzebieze
    sosna zwyczajna
    Pinus sylvestris
    drzewa dorodne
    cechy biometryczne
    wskazniki przewagi konkurencyjnej
    Scots pine
    permanent experimental plots
    dominance coefficients
    thinning intensity
    Opis:
    The research aim was to evaluate the influence of different thinning methods on future crop tree growth. Investigations were conducted on permanent Scots-pine experimental plots, established in 1960s and 1970s in Kozienice, Łąck, Parciaki and Janów Lubelski Forest Districts. To assess the response to thinning of future crop trees, their dominance coefficients were used. These are defined as quotients for each given future crop tree diameter and average stand diameter (WP1), the average dominant layer diameter (WP2) and the average diameter of 100 thickest trees per hectare (WP3). The difference between each coefficient value at the beginning and at the end of the measurement period was used as a measure of the thinning effect. On Kozienice, Łąck and Parciaki plots the differences between treatments were significant, especially in the period after first thinning. The increase of WP3 coefficient occurred in a case of strong thinning – TS1 and TS2. On plot Parciaki also the moderate thinning TU1 and TU2 had a significant influence on change of this coefficient. On plot Janów Lubelski the influence of treatment has not been stated in the first 5-year period but in the next one. Analyses of changes in the dominance coefficients confirmed the hypothesis that the WP3 coefficient is very useful as it is the most stable indicator of future crop-tree position in a stand. On Kozienice, Łąck and Parciaki plots the significant differences between treatments were stated, especially in the period after first thinning. The influence of thinning treatment on the plot Janów Lubelski was not considered for the first 5-year period but in the next one. All reactions to thinning were slower on this plot, possibly because of the relatively poor site conditions. This was a longterm effect. The results obtained suggest that very intense thinning of Scots pine stands should only be implemented under a restricted set of conditions – in healthy, not neglected, forest stands. Classical moderately-selective thinning is preferable to intense thinning and is the most convenient option for pine stands.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 1; 31-45
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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