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Chemical Composition of Soil Solutions from Forest Lands under Anthropogenic Pressure: Comparing Two Extract Recovery Methods
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Chemical Composition of Soil Solutions from Forest Lands under Anthropogenic Pressure: Comparing Two Extract Recovery Methods
W. Spychalski1, B. Walna2, I. Kurzyca3
1Agricultural University of Poznań, Soil Science Department, Szydłowska 50, 60-656 Poznań, Poland
2Jeziory Ecological Station of A. Mickiewicz University, 62-050 Mosina,
3A. Mickiewicz University Water and Soil Analysis Department, Drzymały 24, 60-613 Poznań, Poland
Pol. J. Environ. Stud. 2008;17(3):389–395
Investigations were carried out on sandy forest soils from Wielkopolski National Park (west-central Poland), which have been exposed for a long time to anthropogenic pressure. Two comparative extract recovery methods were performed for aqueous soil extracts (ME) at ratios 1:1, and those obtained from so-called saturated paste (MP). Recovered extracts were analyzed for sodium, potassium, magnesium, calcium, aluminium, chloride, fluoride, nitrate and sulphate concentrations, at various depths of two slightly different soil profiles. Hhigher levels of alkaline cations were obtained in extracts recovered at ratios 1:1, in the case of sandy soils along the entire profile, whereas in profiles with variable lithology, the granulometric composition clearly affected the mechanism of ion release. The patterns of changes in the contents of chlorides and sulphates were similar to those of calcium and magnesium, while fluoride levels in the topsoil differed significantly, depending on the method applied. Differences between the two methods were also significant in the case of aluminium content. The elaboration of aluminium toxicity indices should consider such approaches.
Research on Aluminium Speciation in Poor Forest Soils Using the Sequential Extraction Method
Speciation of Aluminium Released Under the Effect of Acid Rain
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