Plant and Soil

, Volume 11, Issue 4, pp 364–376 | Cite as

Factors influencing the isotopically exchangeable phosphate in soils

Part III. The effect of temperature in some calcareous soils
  • P. Arambarri
  • O. Talibudeen
Article

Summary

The influence of temperature in the range 25° to 45°C on the rate of dissolution and the equilibrium concentration of phosphate, on the labile phosphate and its components, and on the rates of isotopic exchange in four soils with varying CaCO3 contents and phosphate status was investigated. There were abnormal increases in the equilibrium phosphate concentration and the rate of exchange of the slowly labile phosphate of soils of low P status between 35° and 45°. The slowly exchanging component normally constitutes the greater part of the labile phosphate of the soil. The soils of higher phosphate status, irrespective of their CaCO3 content, did not show this abnormal behaviour. The observed difference is connected with the nature and the composition of the basic calcium phosphates associated with the soil calcium carbonate.

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References

  1. 1.
    Aslyng, H. C., The lime and phosphoric acid potentials of soils, their determination and practical applications. Ph. D. Thesis. University of London. 41–44. (1950).Google Scholar
  2. 2.
    Aslyng, H. C., The lime and phosphate potentials of soils; the solubility and availability of phosphate. Roy. Vet. Agr. Col. Copenhagen Den. Yearbook1954, 1–50 (1954).Google Scholar
  3. 3.
    Bassett, H., Jr., The phosphates of calcium, Part IV, The basic phosphates. J. Chem. Soc.3, 620–642 (1917).Google Scholar
  4. 4.
    Baudrenghien, A. and Govaerts, J., Échanges isotopiques et structure du phosphate tricalcique. III. Application de la loi de Boltzmann. IUPAC, Colloquium Munster West, 2–6 Sept. 1954, 212–216 (1954).Google Scholar
  5. 5.
    Buch, K., Die Zersetzung des Dicalciumphosphats durch Wasser. Z. Anorg. Chem.52, 325–341 (1907).Google Scholar
  6. 6.
    Bjerrum, N., Calcium phosphate I. The soil calcium-orthophosphates. Kgl. Danske Videnskab. Selskab Mat. Fys. Medd.31 no.7, 1–68 (1958).Google Scholar
  7. 7.
    Brown, W. E., Lehr, J. R., Smith, J. P., and Frazier, A. W., Crystallography of octo-calcium phosphate. J. Amer. Chem. Soc.79, 5318 (1957).Google Scholar
  8. 8.
    Sanforche, A. and Henry, J., Action of water on dicalcium phosphate. Compt. Rend.194, 1940–2 (1932).Google Scholar
  9. 9.
    Schleede, A., Schmidt, W., and Kindt, H., Calcium phosphates and apatites. Z. Elektrochem.38, 633 (1932).Google Scholar
  10. 10.
    Arambarri, P., and Talibudeen, O., Factors influencing the isotopically exchangeable phosphate in soil. Part I. The effect of low concentrations of organicanions. Plant and Soil11, 343–354 (1959).Google Scholar
  11. 11.
    Warington, R., On the decomposition of tricalcic phosphate by water. J. Chem. Soc.26, 983 (1873).Google Scholar
  12. 12.
    Zhurbitsky, Z. I., and Shtrausberg, D. V., The influence of temperature on the mineral assimilation of plants. Proc. UNESCO Intern. Conf. Radioisotopes in Sci. Research Paris 1957 (in the press) (1959).Google Scholar

Copyright information

© Martinus Nijhoff 1959

Authors and Affiliations

  • P. Arambarri
    • 1
  • O. Talibudeen
    • 1
  1. 1.Rothamsted Experimental StationHarpendenUnited Kingdom
  2. 2.Centro de Edafologia y Biologia AplicadaSevillaSpain

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