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    Wyświetlanie 1-6 z 6
    Tytuł:
    Wpływ wybranych właściwości gleby na bonitację drzewostanów dębowych w Nadleśnictwie Międzyrzec
    Effect of selected soil properties on site index of oak stands in the Miedzyrzec Forest District
    Autorzy:
    Sacewicz, W.A.
    Bijak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/985836.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    siedliska lesne
    bonitacja siedliska
    gleby lesne
    wlasciwosci chemiczne
    indeks troficzny gleb
    drzewostany debowe
    Nadlesnictwo Miedzyrzec
    site index
    soil trophic index (sig)
    soil properties
    quercus sp.
    Opis:
    The objective of the study was to determine the impact of selected soil properties on site index of oak (Quercus sp.) stands in the Międzyrzec Forest District (eastern Poland). We utilised data from the soil−habitat survey, which provided information about physical and chemical properties of soils and stand descriptions for 21 oak stands (tab. 1). The collected data served to determine site index (SI), defined as the stand top−height at the age of 100, and soil trophic index (SIG) that is a synthetic measure of the soil fertility. For SI and SIG distributions met the criteria of the normal distribution (Shapiro−Wilk test p−values equalled 0.118 and 0.297, respectively), we applied one−way analysis of variance, t−test and correlation analysis to determine the influence of the forest habitat type and moisture as well as soil properties and fertility measures on the site index of analysed oaks. The SI of investigated oaks ranged from 23.2 to 29.3 m, 26.5 m on average (tab. 2). It was significantly dependent on the site type (F=6.913, p=0.006) with the lowest values on oligotrophic habitat and the highest – on eutrophic one. No effect of habitat moisture content and soil type was found (t=–0.408, p=0.688 and F=2.599, p=0.076, respectively). The SIG values ranged from 20 to 36, with the average of 29.5 (tab. 2). Similarly to the site index, we found significant impact of the forest habitat type (F=5.384, p=0.015) on SIG values. Soil fertility and physical properties significantly influenced site index of the analysed oaks (fig.). We found positive correlation between SI and SIG values (r=0.566, p=0.007) as well as between SI and clay content (r=0.454, p=0.037). Chemical properties of the soils under studied stands seem to have less profound effect on site index of oak. The highest, but insignificant, correlations were found for recalculated acidity (r=–0.420, p=0.056) and magnesium content (r=0.400, p=0.071).
    Źródło:
    Sylwan; 2018, 162, 01; 3-11
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problemy diagnozy troficzności siedlisk leśnych na porolnych glebach aluwialnych
    Problems of trophic status diagnosis in the forest habitats on former arable alluvial soils
    Autorzy:
    Łabaz, B.
    Kabała, C.
    Bogacz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989599.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gleby porolne
    doliny rzeczne
    dolina Baryczy
    gleby aluwialne
    siedliska lesne
    trofizm gleb
    indeks troficzny gleb
    forest site type
    soil trophic index
    alluvial soils
    Opis:
    The morphology and properties of the post−arable soils that influence the trophic status of forest habitats on the Barycz river terraces (south−western Poland) were analyzed. The fieldwork included the characterization of the soil, tree layer, and the vegetation of the forest floor, as required for the forest habitat evaluation. In the collected soil samples, a set of physico−chemical analysis was carried out, that included: soil texture, bulk density, pH in KCl and water, total organic carbon, total nitrogen, hydrolytic acidity, base cations, and the content of plant−available phosphorus, potassium, and magnesium. Sandy post−arable soils in the Barycz valley have a thick, double− or triple−layered ploughed humus horizon, and the high stock of humified organic matter, nitrogen, and phosphorus, that emphasizes anthropogenic transformation of soils and differentiates them from the natural soils of river valleys. The diagnosis based on the soil trophic index (SIG) indicates generally lower trophic status (mesotrophic) as compared to the diagnoses based on forest floor vegetation and tree−stand (eutrophic status). The SIG model for the post−agrar moist valley habitats should be supplemented with the factors, which improve the apparent trophic status of sandy soils, including the thick humus horizon (post−ploughing) and shallow table of eutrophic ground water.
    Źródło:
    Sylwan; 2016, 160, 08; 684-695
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczbowa wycena "jakości" gleb - narzędzie w diagnozowaniu siedlisk leśnych
    Soil quality numerical valorisation - a tool in forest site diagnosis
    Autorzy:
    Brożek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015924.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    siedliska lesne
    gleby lesne
    indeks jakosci gleby
    lesnictwo
    siedliskoznawstwo lesne
    numerical valorisation of soils
    index
    soil valorisation
    site valorisation
    Opis:
    The numerical valorisation of soil quality is based on the determination of a set of soil properties adjusted to a given soil function in the ecosystem. The obtaining of an index is based on: determination of soil properties, their conversion into abstract numbers called indicators, index calculation and its practical application. The first proposal of a forest soil quality index was the Forest Soil Trophism Index – ITGL calculated for the soils presented in the Atlas of forest soils in Poland. The calculation of the ITGL was based on the following soil properties: percentage share of very fine sand and coarse silt fraction (Ø 0.1−0.02 mm) and silt and clay particles (Ø <0.02mm), reaction, sum of exchangeable bases and organic matter decomposition degree, content of skeletal parts. Its variability in the forest soils of Poland oscillates between 6.0 and 43.0 and its application in the valorisation of forest sites is multidirectional.
    Źródło:
    Sylwan; 2007, 151, 02; 35-42
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bonitacja drzewostanów sosnowych w południowo-zachodniej Polsce w odniesieniu do typów siedliskowych lasu i taksonów gleb
    Site index of Scots pine stands in south-western Poland in relation to forest site types and soil units
    Autorzy:
    Sewerniak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/991498.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany sosnowe
    siedliska lesne
    bonitacja drzewostanow
    typy siedliskowe lasu
    gleby lesne
    warunki wilgotnosciowe
    trofizm gleb
    Polska Poludniowo-Zachodnia
    site index
    pinus sylvestris
    tree growth
    forest site
    soil
    Opis:
    Forming of site index class of Scots pine (Pinus sylvestris L.) stands in relation to forest site types (including their moisture variants) and soil units (type/subtype and also – in minor extent – geological genesis of soil parent material) was investigated. The research was conducted in the Bolesławiec, Głogów and Oława forest districts (SW Poland) in 348 Scots pine stands. The values of the pine site index got higher with increasing fertility of soil units and better forest site type, but only when plots of sandy soils where concerned. Site index was found to differ significantly between fresh than moisture forest sites and soil units. The study results demonstrated that on fresh soils of sandy texture site index of Scots pine was distinctly related even to minor differences of site properties that concerned both its moisture and fertility. Scots pine, by height growth, does not fully utilize the great nutrient retention of fine textured soils that concerned both fresh and moisture pedons. Fine textured soils should be designed for eutrophic broadleaved tree species planting only, which would enable to fully utilize the trophic potential of such soils. The relation between the site index and geological genesis of sand forming parent material of soils was found. The differences in pine growth on sands of other genesis were assumed to be a result of different sorting and mineral composition of these materials.
    Źródło:
    Sylwan; 2013, 157, 07; 516-525
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie bonitacji wzrostowej drzewostanów daglezjowych w Polsce
    Variability of the site index of Douglas fir stands in Poland
    Autorzy:
    Bijak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/987057.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    daglezja zielona
    Pseudotsuga menziesii
    drzewostany daglezjowe
    wzrost drzewostanu
    bonitacja wzrostowa
    siedliska lesne
    bonitacja siedliska
    gleby lesne
    rzezba terenu
    Polska
    site index
    soil type
    forest site type
    relief features
    pseudotsuga menziesii
    Opis:
    The objective of the study was to analyse the site index (SI) of Douglas fir (Pseudotsuga menziesii) stands in relation to the forest habitat type, soil type and relief characteristics. We utilised infor− mation available in the Information System of the State Forests in Poland that included selected parameters describing habitat conditions and dendrometric characteristics of Douglas fir stands. In total, processed data referred to 863 stands with a total area of 1,644.45 ha. As the SI distribution was not consistent with the normal one (Shapiro−Wilk test, p <0.0001) we applied Kruskal−Wallis or Mann−Whitney tests to assess the significance of observed differences. Site index of surveyed stands ranged from 19.9 to 47.8 m, 32.6 m on average (standard deviation of 3.3 m). Douglas fir in northern and southern Poland characterized by higher SI than in western and south−western part of the country (HK−W=83.5; p<<0.001; fig. 2). Forest habitat type significantly distinguished analysed stands (HK−W=30.1; p<<0.001). The highest SI values were observed for mixed deciduous habitats (fig. 3). For more fertile fresh deciduous habitats Douglas fir achieved slightly lower site index, while the least fertile mixed coniferous habitats are characterized by significantly lower SI. Habitat moisture variant had no significant effect on the average SI values (HK−W=2.6; p=0.269). The highest values were found in strongly fresh habitats (32.8 ±4.1 m), while the lowest in the humid variant (31.7 ±3.4 m). We found significant influence of soil type (HK−W=23.2, p<0.001) even though the average SI values for each category were relatively similar (fig. 4). The highest values were observed for Cambisols (33.3 ±3.7 m), while the lowest for Arenosols (32.1 ±3.0 m). Particle size distribution is an important factor for Douglas fir site index (tab.). We found that the heavier material (the higher the content of silt and clay), the significantly higher SI values (HK−W=16.9; p=0.001). Mean SI for stands growing on former farmlands (32.0 ±3.3 m) and on forest areas (32.7 ±3.3 m) were not significantly different (ZM−W=1.73; p=0.084). There was no significant effect of the relief forms on site index surveyed Douglas fir stands apart from the fact that stands growing on slopes are characterized by significantly higher SI (ZM−W=1.99; p=0.047).
    Źródło:
    Sylwan; 2017, 161, 03; 208-217
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wzniesienia nad poziom morza i podłoża geologicznego na produkcyjność siedlisk Beskidu Żywieckiego dla buka
    Effect of elevation above sea level and geology on the site productivity for European beech in the Beskid Zywiecki Mountains
    Autorzy:
    Socha, J.
    Ochał, W.
    Maj, M.
    Grabczyński, S.
    Lach, J.
    Gruba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/991314.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    wymagania siedliskowe
    Beskid Zywiecki
    siedliska lesne
    produkcyjnosc
    wysokosc nad poziomem morza
    ekspozycja
    nachylenie stoku
    bonitacja siedliska
    podloze geologiczne
    fagus silvatica
    site index
    parent rock
    soil nutrient regime
    site productivity
    Opis:
    The aim of the study was to determine the effect of topography and parent rock as well as selected characteristics of the soils on the site productivity for European beech in the Beskid Żywiecki Mountains (S Poland). The research material consisted of measurements performed on sample plots ranging in size from 0.01 to 0.10 ha located in 50 beech stands aged 40−140 years. Productivity of beech stands was to the greatest extent determined by the elevation above sea level. The site index of beech stands is significantly affected by the type of geological substrate, whereas there was no relationship between productivity and analyzed soil characteristics.
    Źródło:
    Sylwan; 2014, 158, 11; 850-859
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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