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    Wyświetlanie 1-5 z 5
    Tytuł:
    Profile variability of lithium content in soils of selected forest ecosystems
    Autorzy:
    Malczyk, P
    Powiązania:
    https://bibliotekanauki.pl/articles/1450642.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    total lithium
    forest ecosystem
    soil profile
    soil
    lithium content
    forest soil
    distribution
    terrestrial ecosystem
    Opis:
    The distribution of total lithium content with depth was studied in soils of selected forest ecosystems, with regard to their physicochemical properties and possible anthropogenic impact. The six soil profiles, representing forest soils, were selected for the study: Udipsamments formed from sandr sand, eolian sand and alluvial sand, and Haplorthods Humic formed from eolian sand, Dystrochrepts formed from alluvial silt and Eutrochrepts formed from boulder loam. The total Li content was determined after previously dissolving the samples in a mixture of concentrated acids: hydrofluoric and nitric (HF+HNO3). The content of Li in solutions was determined using the FAS method on PU-9100 X Philips spectrometer. The total lithium content in studied soils under investigations occurs in range of 1.63 to 229.68 mg kg-1 and was considerably lower in organic horizons (1.63-8.07 mg kg-1 ) than in mineral (17.58-229.68 mg kg-1). The concentration of lithium in subhorizons of forest litter increases according to the litter decomposition degree (01<0f<0fh). The Li concentrations found in all forest soils formed from sand were much higher than its natural content in surface mineral horizons of arable soils 1.30-56.00 mg kg-1. The total lithium content in studied soils was negative statistically correlated with the content of organic carbon (-0.6062), silt and clay fraction (-0.7131 and -0.6322), hydrolytic acidity (-0.5222), sum of exchangeable bases (-0.6196) and cation exchange capacity (-0.6277).
    Źródło:
    Acta Agrophysica; 2001, 50; 189-195
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of humic substances in humid subalpine forest soils in Central Taiwan
    Autorzy:
    Chen, J S
    Chiu, C.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450325.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    subalpine forest
    temperature
    humic acid
    humification
    humic substance
    soil
    Taiwan
    ecosystem
    forest soil
    terrestrial ecosystem
    fulvic acid
    Opis:
    The study site, 2700 m a.s.l., is located in the central Taiwan. A globally rare combination of the mean temperature (ca. 9.5 °C) and total annual precipitation (ca. 4100 mm) makes studies on pedogenic and edaphic processes of the moist soils in this area worthwhile. The study was undertaken to investigate distribution and characteristics of humic substances in this subalpine forest ecosystem. Fulvic acids comprised a higher total organic carbon fraction (1.8 to 25%) than humic acids (1.1 to 13.4%). Fulvic acids were more mobile and migrated downwards to deeper horizons. Comparatively, humic acids were distributed more in the surface horizons. The hu- mification index, based on E4/E6, showed that humification varied in different horizons even in the same profile. The AlogK and RF values indicate that the types of humic acids extracted from Tsuga forest soil are grouped as P or A types, whereas Rp or B types are in Picea forest soil, suggesting a high degree of humification of humic acids in such soils. Features of the absorption spectra were consistent with the classification of humic acids with A logK and RF values. Humification indices and humic acid types in these subalpine soils indicate that they are similar to acidic soils elsewhere with abundant rainfall and cold climate.
    Źródło:
    Acta Agrophysica; 2001, 50; 41-47
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Trace elements content in soils of the Krzywiczyny Forest Reserve
    Autorzy:
    Kusza, G
    Duzynski, M.
    Marcinkowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450912.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    manganese
    trace element
    water quality
    air pollution
    Namyslow Forest Inspectorate
    forest soil
    lead
    nickel
    soil environment
    soil
    cadmium
    Krzywiczyny Forest Reserve
    zinc
    copper
    terrestrial ecosystem
    forest
    Opis:
    The aim of the work was to investigate various soils properties in the partial forest reserve "Krzywiczyny", in the Namysłów Forest Inspectorate (Opole Voivodeship). It was found that upper soil horizons, including organic, humic and illuvial ones, indicated clear accumulation of Mn, Zn, Cu, Pb and Cd. However, a tendency to diminution of these elements content with profile depth was noted. High positive correlation was stated between organic matter content and Mn, Zn, and Cu amounts in the brown leached soils studied.
    Źródło:
    Acta Agrophysica; 2001, 50; 169-175
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors affecting forest soil distribution and properties in the river breaks of the Roztocze Region
    Autorzy:
    Czarnecka, B
    Janiec, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450487.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    river valley
    forest ecosystem
    plant community
    hydrological process
    ground water
    Jelen River
    bog-alder forest
    forest soil
    geomorphological process
    mineral soil
    Sopot
    organic soil
    soil
    Roztocze macroregion
    soil property
    terrestrial ecosystem
    distribution
    Opis:
    Studies on the soils in forest ecosystems in breaks of the rivers Jeleń and Sopot were carried out in the years 1997-1998. Although the rivers differ in length, catchment area, amount of water carried and breadth of the valleys, the most important factors affecting soil formation and their spatial differentiation are similar: bedrock, relief, water drainage, natural type of water management, position of the ground water-table relative to the river water level, and chemistry of spring and soil waters. Steep slopes of the valleys covered with poor and highly acidic podzolic soils are usually overgrown with fir and pine phytocenoses, or rarely, with mixed oak-pine forests. The bottoms are often characterised by longitudinal duality of the flood-plain benches. In the drier area close to the river beds under ash-alder forests, there are more fertile gley soils and gley podzols. Poorer and more acidic localities are occupied by mixed forests with spruce. In permanently moist fragments of the benches at the foot of the slopes and in depressions with stagnant water weakly acidic peat-mud and peat soils occur overgrown with bog-alder forests. Peculiarities of these areas are low peat-bogs suspended even up to 4-6 m above the water-table of the river.
    Źródło:
    Acta Agrophysica; 2001, 50; 81-93
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The soil fungi communities of brown forest podzolic soils in two different oak-hornbeam forests of the Zwierzyniecki Park in Bialystok
    Autorzy:
    Tyszkiewicz, Z
    Powiązania:
    https://bibliotekanauki.pl/articles/1450887.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    degenerated oak-hornbeam forest
    Pinus-Lamniastrum
    Polska
    brown soil
    forest soil
    oak-hornbeam forest
    podzolic soil
    Zwierzyniecki Park
    soil fungi
    soil
    fungi community
    Bialystok
    grey-brown podzolic soil
    terrestrial ecosystem
    forest
    Tilio-Carpinetum typicum
    Opis:
    The aim of the studies carried out in the natural oak-hornbeam forest Tilio-Carpinetum typicum and in the degenerated form in the stage of pinetization Pinus-Lamniastrum, was to obtain and compare qualitative-quantitative structures of soil fungi communities in two different oak-hornbeam forests. This degenerated form of oak-hornbeam forest is the result of removing the natural tree population (typical oak-hornbeam forest) and re-afforesting the resultant vacant area with pines. The study plots were located in such a way that the variations of soil fungi communities were affected only by seasonal changes in the vegetation of the degenerated oak-hornbeam forest Pinus-Lamnias- trum. The soils in both study plots are typical forest grey-brown podzolic soils (Luvisols). The results of mycoiogical studies indicate significant differences between soil fungi communities in both oak-hornbeam forests, although similarities especially in species composition of 15 of the most abundant fungi species were also found. The differences are the result of changes in the floral composition of degenerated oak-hornbeam forest. In the past, when typical oak-hornbeam forest covered whole studied areas, the soil fungi communities were probably almost the same in both plots. The first change could have happened after the removal of the trees; the second, after the re-afforestation of the resulting vacant area with pines. The re-appearance of Tilio-Carpinetum typicum in its once occupied habitat causes changes in the soil fungi community in the degenerated oak-hornbeam forest.
    Źródło:
    Acta Agrophysica; 2001, 50; 235-244
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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