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    Wyświetlanie 1-3 z 3
    Tytuł:
    Toksyczność glinu (Al) w glebach leśnych
    Autorzy:
    Gruba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023855.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gleby lesne
    glin
    lesnictwo
    toksycznosc
    gleboznawstwo lesne
    aluminium (al)
    toxicity
    forest soils
    poland
    Opis:
    The paper presents resent research results on the effect of aluminium (Al) toxicity on forest soils. It has been stated that with the present acidification level of the environment the toxic effect of aluminium compounds does not threaten the sustainability of stands. At the same time, the simulation of heavy acidification of soil environment has proved that mixed stands are more resistant to Al than pure spruce stands growing under the same conditions.
    Źródło:
    Sylwan; 2004, 148, 01; 50-56
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Szacowanie gęstości objętościowej gleb górskich na podstawie zawartości węgla organicznego
    Estimation of bulk density of the mountain soils from the organic carbon content
    Autorzy:
    Kabała, C.
    Gałka, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/985683.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gleboznawstwo
    gleby gorskie
    gleby lesne
    zawartosc wegla organicznego
    gestosc objetosciowa
    szacowanie
    forest soils
    mountain soils
    bulk density
    pedotransfer function
    organic carbon
    Opis:
    The missing data on bulk density make impossible the calculations of soil water retention, organic carbon pools and evaluation of the numerical indices of soil and forest habitat fertility and potential productivity. A common reason of skipping of bulk density measurement is the high content of rock fragments in soil, in particular in the subsoil layers, that may hamper the collection of samples with undisturbed soil structure. The aim of present study was to analyse the relationships between bulk density and basic properties of mountain soils, where the problem of high skeleton content is relatively common, selection of the properties of the largest impact on the soil bulk density, and the fitting of the mathematical model (equation) that allows the prediction of soil bulk density at the highest available statistical significance. Forest soils in the Sudeten Mountains and the Sudeten Foreland, SW Poland (total number of samples N=580), situated on various bedrocks (granite, basalts, gneiss, mica schists, sandstones, mudstones, etc.) were selected to analysis. It was found in those soils featured by large variability of soil texture (the range of clay content 0−40%), skeleton content (0−74%), and organic carbon content (0.09−50%) in the soil profile, that the bulk density (having the values 0.10−1.87 g/cm3 in mineral layers and 0.04−0.58 g/cm3 in organic/litter layers) was individually correlated with the organic carbon content, skeleton content, clay content, and the depth of sampling (depth of particular soil layer), but the multifactor analysis has shown, that the organic carbon content has the highest impact on the bulk density and the organic carbon alone is sufficient for reliable prediction of soil bulk density. The best fitting of the measured and predicted bulk densities (R2=0.83) was provided by ‘dose−response’ Hill model: dv=1.72–[(2.36·Corg0.6)/(13.80.6+Corg0.6)], that returned dv values between 0.10 and 1.72 g/cm3 in a range of Corg content between 50 and 0%.
    Źródło:
    Sylwan; 2019, 163, 04; 320-327
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartość i profilowe rozmieszczenie frakcji fosforu w uprawnych i leśnych czarnoziemach z poziomem cambic
    Content and profile distribution of phosphorus fractions in arable and forest Cambic Chernozems
    Autorzy:
    Jonczak, J.
    Simansky, V.
    Pollakova, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/989926.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gleboznawstwo
    gleby uprawne
    gleby lesne
    czarnoziemy
    fosfor
    zawartosc fosforu
    frakcje fosforu
    specjacja chemiczna
    rozmieszczenie profilowe
    chernozems
    arable soils
    forest soils
    phosphorus speciation
    Opis:
    Comparative studies on the content and profile distribution patterns of phosphorus fractions in arable and forest Cambic Chernozems were conducted near the village Báb (western Slovakia). Soil samples were collected from every 10 cm and analyzed using standard procedures in soil science. Long term differences in the type of the studied soils usage were reflected in their physical and chemical properties (bulk density, porosity, acidity, the total content of organic carbon and nitrogen), as well as in the content and profile distribution patterns of phosphorus fractions. Total phosphorus content ranged from 498.8 to 754.7 mg/kg in arable soil and from 480.4 to 835.9 mg/kg in forest soil. Residual fraction, which constituted 54.9−77.8% of total phosphorus in arable soil and 57.3−79.2% in forest soil, was a predominant fraction. Such large contribution of this fraction is typical for young soils, with weakly weathered mineral substrates. Exchangeable phosphorus in arable soil constituted 0.6−6.1%, while 0.5−3.0% in forest soil, showing decreasing trends with depth in both soils. Free iron oxides and carbonates were important factors influencing profile distribution of phosphorus in the investigated soils. Iron oxides bound the element mainly in acidified horizons, whereas carbonates in alakaline (Bw and C) horizons. Organic fraction significantly differed in the investigated soils. A much larger content and contribution of this fraction in total phosphorus was noticed in forest soil. The content of organic phosphorus was positively related to the content of organic carbon. Stable fraction of organic phosphorus predominated over labile one in both soils.
    Źródło:
    Sylwan; 2015, 159, 11; 931-939
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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