EFFECT OF pH ON THE RELEASE OF ORGANIC MATTER FROM MUCKS
The effect of high pH values on the release of organic matter (OM) from mucks was investigated. This study was conducted on homoionic hydrogen forms of 7 mucks (Terric Histosols). Concentration of dissolved organic matter (DOM) released were determined colorimetrically at l=465 nm. Parameters Q2/6 and Q4/6 were calculated from spectra in visible region. The dissolution of soil OM was significantly affected by pH. The relationship could be satisfactorily described by the equation: DOM = 0.01Чexp(b1ЧpH). The b1 parameter quantified the DOM release process in relation to the changes in soil pH. The investigations proved correlations among W1, Q and b1 indexes.
Keywords: dissolved organic matter (DOM), mucks, pH, state of secondary transformation
References:
1. Naucke W. // Characterization of peats by their components and the reliability of the determination of individual components. In: Moor- und Torfkunde. K. Gхttlib E. Schweizerbert’sche Verlagsbuchhandlung, Stuttgart, West Germany. 1980. pp.185–91 (in German)
2. Kalbitz K., Geyer W., Geyer S. // Spectroscopic properties of dissolved humic substances - a reflection of land use history in a fen area. Biogeochemistry. 1999. № 47, p. 219–238.
3. Okruszko H. // The principles of identyfications and division of hydrogenic soils from point of view of amelioration purposes (in Polish), Bibl. Wiad. IMUZ. 1976. № 52, p. 7–54.
4. Kalbitz K., Solinger S., Park J.H., Michalzik B., Matzner E. // Controls on the dynamics of dissolved organic matter in soils: a review, Soil Sci. 2000. № 165, p. 277–287.
5. Gawlik J. // Water holding capacity of peat formations as an index of the state of their secondary transformation, Pol. J. Soil Sci. 1992. № 2, p. 121–129.
6. Szajdak L. // Chemical properties of peat. In: Ilnicki P (ed.) Peat and Peatlands. Wydawnictwo Akademii Rolniczej im. A. Cieszkowskiego, Poznaс. 2002. p. 432–450 (in Polish)
7. Leinweber P., Schulten H-R., Kalbitz K., Meissen R., Jancke H. // Fulvic acid composition in degraded fenlands. J Plant Nutr Soil Sci. 2001. № 164, p. 371–379.
8. Baes A.U., Bloom P.R. // Fulvic Acid UV-VIS Spectra: Influence of Solvent and pH, Soil Sci. Soc. Am. J. 1990. № 54, p. 1248–1255.
9. Kononowa M.M. // Soil Organic Matter, Pergamon, Elmsford, N.Y. 1966.
10. Ghosh K., Schnitzer M. // UV and visible absorption spectroscopic investigations in relation to macromolecular characteristics in humic substances, J. Soil Sci. 1979. № 30, p. 735–743.
11. Tipping E., Woof C. // Humic substances in acid organic soils: modelling their release to the soil solution in terms of humic charge, J. Soil Science. 1990. № 41, p. 573–581.
12. Matyka-Sarzyсska D., Sokoіowska Z. // Empirical equation to describe the effect of pH on organic matter release from mucks, Intern. Agrophysics. 2005. № 19, p. 323–328.
Issue: 3, 2009
Rubric: Physical, Chemical and Biological Properties of Bog Formation
Pages: 105 — 109
Downloads: 1005