Soil & Water Res., 2013, 8(2):49-55 | DOI: 10.17221/52/2012-SWR

Potassium fixation in soil size fractions of arid soilsOriginal Paper

Mahdi NAJAFI-GHIRI1,2, Ali ABTAHI2
1 College of Agriculture and Natural Resources, Shiraz University, Darab, Iran
2 Department of Soil Science, College of Agriculture, Shiraz University, Shiraz, Iran

Amounts of potassium (K) fixed in soil fractions of 10 calcareous soils of southern Iran were measured to evaluate the contributions of different soil size fractions to K fixation. Soil particles were fractionated after dispersion of the soils with an ultrasonic probe. Potassium fixation analysis was done by addition of 1000 mg K/kg samples. Mineralogy of the size fractions was determined by X-ray diffraction. The clay fractions were dominated by smectite, chlorite, mica, and palygorskite. Potassium fixation capacities ranged from 104 to 148 mg/kg for clay, from 102 to 155 mg/kg for silt, and from 96 to 187 mg/kg for sand fractions. A positive and significant relationship (P < 0.05) was obtained between K fixation capacity and smectite content for the clay fractions. High amounts of K fixed in the sand fraction may be explained by a larger diffusion path of fixed K out of the frayed edges of micaceous and smectitic minerals into the extracting solution, low cation exchange capacity (CEC) of the coarse fraction and thereby the high concentration gradient along solution and interlayers, physical entrapment of K ions in coarse aggregates cemented by carbonates, and by the presence of clay particles in coarse fractions due to incomplete dispersion of coarse aggregates.

Keywords: calcareous soils; Iran; smectite; soil fractionation

Published: June 30, 2013  Show citation

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NAJAFI-GHIRI M, ABTAHI A. Potassium fixation in soil size fractions of arid soils. Soil & Water Res. 2013;8(2):49-55. doi: 10.17221/52/2012-SWR.
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    References

    1. Balali M.R., Malakouti M.J. (1998): Study of exchangeable K changes in agricultural soils of Iran. Soil and Water, 12: 59-70. (in Farsi)
    2. Caravaca F., Lax A., Albaladejo J. (1999): Organic matter, nutrient contents and cation exchange capacity in fine fractions from semiarid calcareous soils. Geoderma, 93: 161-176. Go to original source...
    3. Carey P.L., Metherell A.K. (2003): Rates of release of non-exchangeable potassium in New Zealand soils measured by a modified sodium tetraphenyl-boron method. New Zealand Journal of Agricultural Research, 46: 185-197. Go to original source...
    4. Chapman H.D. (1965): Cation exchange capacity. In: Black C.A. (ed.): Methods of Soil Analysis. Part 2. American Society of Agronomy, Madison, 891-901. Go to original source...
    5. FAO (2006): World Reference Base for Soil Resources. World Soil Resources Reports. FAO, Rome.
    6. Helmeke P.A., Sparks D.L. (1996): Methods of Soil Analysis. Part 3: Chemical Methods. American Society of Agronomy, Madison.
    7. Jalali M. (2006): Kinetics of nonexchangeable potassium release and availability in some calcareous soils of western Iran. Geoderma, 135: 63-71. Go to original source...
    8. Johns W.D., Grim R.E., Bradley F. (1954): Quantitative estimation of clay minerals by diffraction methods. Journal of Sedimentary Petrology, 24: 242-251. Go to original source...
    9. Leinweber P., Reuter G., Brozio K. (1993): Cation exchange capacities of organo-mineral particle size fractions in soils from long-term experiments. Journal of Soil Science, 44: 111-119. Go to original source...
    10. Lopez-Pinerio A., Garcia Navarro A. (1997): Potassium release kinetics and availability in unfertilized Vertisols of southwestern Spain. Soil Science, 162: 912-918. Go to original source...
    11. Munn D.A., Wilding L.P., McLean E.O. (1976): Potassium release from sand, silt, and clay soil separates. Soil Science Society of America Journal, 40: 364-366. Go to original source...
    12. Murashkina M.A., Southard R.J., Pettygrove G.S. (2007): Silt and fine sand fractions dominate K fixation in soils derived from granitic alluvium of the San Joaquin Valley, California. Geoderma, 141: 283-293. Go to original source...
    13. Najafi Ghiri M. (2010): Study of morphological and mineralogical properties and potassium status of soils of Fars province. [Ph.D. Thesis.] Department of Soil Science, Shiraz University, Iran.
    14. Najafi Ghiri M., Abtahi A., Karimian N., Owliaie H.R., Khormali F. (2011). Kinetics of nonexchangeable potassium release as a function of clay mineralogy and soil taxonomy in calcareous soils of southern Iran. Archives of Agronomy and Soil Science, 57: 343-363. Go to original source...
    15. Nelson D.W., Sommers L.E. (1982): Total carbon, organic carbon, and organic matter. In: Page A.L. (ed.): Methods of Soil Analysis. Part 2. American Society of Agronomy, Madison, 539-579. Go to original source...
    16. Olk D.C., Cassman K.G. (1995): Reduction of potassium fixation by two humic acid fractions in vermiculitic soils. Soil Science Society of America Journal, 59: 1250-1258. Go to original source...
    17. Owliaie H.R., Abtahi A., Heck R.J. (2006): Pedogenesis and clay mineralogical investigation of soils formed on gypsiferous and calcareous materials, on a transect, southwestern Iran. Geoderma, 134: 62-81. Go to original source...
    18. Salinity Laboratory Staff (1954): Diagnosis and Improvement of Saline and Alkali Soils. Agriculture Handbook. Vol. 60. U.S. Department of Agriculture, Washington, D.C.
    19. Scott A.D. (1968): Effect of particle size on interlayer potassium exchange in micas. In: 9th Int. Congress Soil Science Transactions. Adelaide, 649-660.
    20. Sharma V.K., Mishra M.K. (1991): Potassium adsorption kinetics in soils differing in clay content and mineralogy. Journal of Potassium Research, 7: 176-181.
    21. Shaviv A., Mohsin M., Pratt P.F., Mattigod S.V. (1985): Potassium fixation characteristics of five southern California soils. Soil Science Society of America Journal, 49: 1105-1109. Go to original source...
    22. Soil Survey Staff (1993): Soil Survey Manual. USDA. Handbook No. 18. Washington, D.C.
    23. Soil Survey Staff (2010): Keys to Soil Taxonomy. USDA. NRCS. Washington, D.C.
    24. Song S.K., Huang P.M. (1988): Dynamics of potassium release from potassium-bearing minerals as influenced by oxalic and citric acids. Soil Science Society of America Journal, 52: 283-390. Go to original source...
    25. Sparks D.L., Huang P.M. (1985): Physical chemistry of soil potassium. In: Munson R.D. (ed.): Potassium in Agriculture. American Society of Agronomy, Madison, 201-276. Go to original source...
    26. Tafarroji S.H., Haghparast Tanha M.R. (2005): Determination of critical level of K with use of Cate-Nelson and Mitscherlich-Bray function methods for maize in soils of Gilan province. In: 9th Congress Soil Science of Iran. Tehran, 464-465.

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