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    Wyświetlanie 1-2 z 2
    Tytuł:
    Stawonogi uszkadzające drewno w badaniach poligonowych
    Variability of chemical features of upper horizons in forest soils on the example of Dupnianski stream catchment in the Beskid Slaski Mts.
    Autorzy:
    Zwydak, M.
    Małek, S.
    Jodłowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013205.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wlasciwosci chemiczne
    Beskid Slaski
    gleby lesne
    zlewnia Potoku Dupnianskiego
    poziom mineralny
    poziom organiczny
    drzewostany swierkowe
    lesnictwo
    poziom prochniczny gleby
    zmiennosc
    mountain soils
    norawy spruce stand
    chemical features
    variavility
    Opis:
    The objective of the study was to investigate variability of chemical features of upper horizons in forest soils as well as confirmation of collecting the mixed sample that is supposed to describe the soil conditions more effectively. The lowest variability (ca 10%) was observed for pH in H2O and KCl as well as C/N ratio. The highest coefficient of variance exceeded 100% (Ca content). For almost all analysed chemical parameters, the results obtained for mixed sample (average of 5 samples systematically distributed within the study area) are in ±1 standard deviation range from the average of 25 individual samples.
    Źródło:
    Sylwan; 2008, 152, 08; 66-72
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wylesień na krótkoterminowe zmiany składu chemicznego wody w zlewni Potoku Malinowskiego (Beskid Śląski)
    Influence of deforestation on short-term changes in the chemical composition of water in the Malinowski Stream catchment (southern Poland)
    Autorzy:
    Kosmowska, A.
    Żelazny, M.
    Małek, S.
    Siwek, J.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989906.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gory
    Beskid Slaski
    wylesienia
    zlewnia Potoku Malinowskiego
    wody plynace
    sklad chemiczny
    zmiany skladu chemicznego
    streamwater chemistry
    sulfur
    nitrogen
    flood events
    deforestation
    Opis:
    The aim of the study was to determine the effect of deforestation caused by environmental pollution on the chemical composition of stream waters draining the small catchments located in the Skrzyczne massif (Beskid Śląski, southern Poland). In the 1950−60s this area was subjected to heavy anthropogenic pressure with excessive deposition of sulfur and nitrogen compounds. It resulted in the damage to the stands and deforestation of the ridge fragments of the studied area. The study was conducted in the catchment of the Malinowski Stream and its two subcatchments: forested and deforested in 2013. Waters of the studied streams characterized by low conductivity and mineralization. In the ridge subcatchments they were slightly acidic and in the main catchment – slightly alkaline. In all catchments anions were predominated by sulfates – with the largest in the deforested catchment (31% mval/L). Also nitrates had very large share in the structure of the chemical composition of water, particularly in the forested catchment (15% mval/L). Interestingly, there were low levels of bicarbonates, particularly in the ridge catchments, with their share lower than sulfates and nitrates. Cations in all streams were predominated by calcium. The structure of the chemical composition of water of the Malinowski Stream, expressed by the average share of individual ions was as follows: SO4−HCO3−NO3−Cl−F−Ca−Na−Mg−K−NH4, and in the case of streams draining small ridge catchments: – SO4−NO3−HCO3−Cl−F−Ca−Na−Mg−K−NH4. Conductivity of water decreased together with increased water levels in streams during floods. In the deforested catchment this decrease was more evident. The reaction of nitrate concentration to the increase in water level was however different, as in the stream draining the forested catchment it decreased sharply, while in the deforested catchment it decreased slightly or remained at the similar level. In the dry periods the chemical composition of waters of the examined streams were subject to far less change than during the floods, with the changes of e.g. conductivity being much higher in the stream draining the forested catchment.
    Źródło:
    Sylwan; 2015, 159, 09; 778-790
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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