Effects of secondary transformation of peat-moorsh soils on their physical properties

• Autorzy: Slawinski C. , Sokolowska Z. , Walczak R.
• Języki publikacji: EN

Abstrakty

EN

Detoriation of water conditions in the peat soils are closely related to the transformations that take place in the structure of organic soil mass. Changes in water relations together with an increased access of air enable various physical, chemical and biological processes to take place. This, in turn, leads to changes in organic soil mass and soil mass transformation into moorsh. The scope of changes and their rate depends also on the properties of the original materials. Amorphic peats are most susceptible to secondary tranformations, whereas fibrous peats undergo moorsing slower. peat formations after secondary transformations have been divided into 5 groupsassuming numerical values of water absorptivity as the basic for the division. This index expresses the ratio between the lowest water absorptivity of a given formation to its absorptivity in the fresh state.The aim of the present work was to evaluate in what way type of moorsh and degree of its secondary transformation influence some of its physical properties, i.e., retention curves and water conductivity, absorption level (wetting) and desorption (drying) of steam as well as its specific surface area. The study object included peaty moorshes and proper moorshs originating from peats formations at various stages of decomposition. The soil material originated from the region of Polesie Lubelskie.

Słowa kluczowe

EN

desorption; hydrology; retention curve; degradation; peat-moorsh soil; secondary transformation; peat soil; soil degradation; physical property; soil; sorption; specific surface area; peatland system; habitat condition; agrophysics

• Wydawca: -
• Czasopismo: Acta Agrophysica
• Rocznik: 2000
• Tom: 26
• Opis fizyczny: p.85-93,fig.

Twórcy

autor

Slawinski C.

• Polish Academy of Sciences, Doswiadczalna 4, 20-290 Lublin, Poland

autor

Sokolowska Z.

autor

Walczak R.

Bibliografia

• 1. Bachmann J,: Wettability related to the degree of humification of soil organic matter and its impact on infiltration and soil water retention curves. Z. f. Kulturtechnik und Landenwicklung 37, 190-196 (in German), 1996
• 2. Bohl H., Facklam M., Marschall S, Renger M.: Methodology to determine water balance parameters of peat soils using easy installable groundwater lysimeters and TDR (in German). Z. f. Kulturtechnik und Landenwicklung 37, 185-189, 1996.
• 3. Gawlik J.: Water holding capacity of peat formation as an index of the state of their secondary transformation. Polish J. Soil Sci., 25, 121-126, 1992.
• 4. Gawlik J.: The ussefulnes of water holding capacity index for evaluation of the state of secondary transformation of the peat soils (in Polish). Wiad. IMUZ, 18, 198-216, 1996.
• 5. Malicki M.A,, Plagge R., Renger M., Walczak R.: Application of time-domain reflectometry (TDR) soil moisture miniprobe for the determination of unsaturated soil water characteristics from undisturbed soil cores. Irrigation Sci., 13, 65-72, 1992.
• 6. Malicki M.A., Skierucha W.: A manually controlled TDR soil moisture meter operating with 300 ps. rise time needle pulse. Irrigation Sci., 10, 153-163,1989.
• 7. Malicki M.A., Walczak R.T.: Evaluating soil salinity status from bulk electrical conductivity. European Journal of Soil Sci. 50, 505-514, 1999.
• 8. Okruszko H.: Classification principles of organic soils (in Polish), Wiad. IMUZ, 12,19-38,1974.
• 9. Okruszko H.: Keys to hydrogenic soil investigation and classification for reclamation purposes (in Polish). Bibl. Wiad. IMUZ, 52, 7-54,1976.
• 10. Okruszko H., Piascik H.: Comparative characteristics of peat soil classification (in Polish). Prace Komisji Nauk. PTG, Warszawa, V-43,47-53, 1981,
• 11. Petersen L.W., Moldrup P., Jacobsen O.H., Rolston D.E.: Relations between surface area and soil physical and chemical properties. Soil Sci., 161, 9-20, 1996,
• 12. Piaścik H., Smólczyński S., Orzechowski M.: Physical, water and retaining properties of hydrogenic soils of the Vistula Delta. Polish J. Soil Sci„ XXXI, 9-14, 1998.
• 13. Ross PJ-, Smettem RJ.: Describing soil hydraulic properties with the sums of simple functions. Soil Sci. Soc, Am. J., 57, 26-29, 1993.
• 14. Ryden B.E.: Double layer and specific surfaces of organic soils for modeling the unsaturated hydraulic conductivity. Proc. Inter. Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils. Riverside, California, October 11-13, 1989, Ed. Van Genuchten M. Th. and Leij F. J, 693-706, 1989.
• 15. Sobczuk H.A., Plagge R., Walczak R.T., Roth Ch.H.: Laboratory equipment and calculation procedure to rapidly determine hysteresis of some soil hydrophysical properties under nonstady flow conditions. Z. Pflanzen. Bodenkd. 155, 157-163, 1992.
• 16.Szajdak L., Matuszewska T., Gawlik J.: Effect of secondary transformation stale of peat- moorsh soils on their amino acid content, inter. Peat j., 8, 76-80, 1998.
• 17.Van Genuchten M.T.: A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J.( 44, 892-898, 1980.
• 18.Walczak R.T. Sławiński C., Malicki M., Sobczuk H.: Measurement of water characteristics in soil using TDR technique: water characteristics of loess soil under different treatment. Int. Agro- physics, 7, 175-182, 1993.
• 19.Weiss R., Alm J., Laiho R., Laine J.: Modeling moisture retention in peat soils. Soil Sci. Soc. Am. J., 62, 305-313, 1998.
• 20.Zawadzki S., Michałowska K., Stawiński J.: The application of surface measurements of soils for determination of the content of water unavilabie for plants. Polish J. Soil Sci., IV, 89-92,1971.
• 21.Zhang R., Van Genuchten M.T,: New models for unsaturated soil hydraulic properties. Soil Sci., 158, 77-85, 1994.
• 22.Zółcik M.: Relationship between pF value and water content in peat soils with different moorshing grade (in Polish). Wiad. IMUZ,VII, 153-161, 1968.