Plant and Soil

, Volume 49, Issue 3, pp 449–459 | Cite as

Phosphorus transformations from rock phosphates in acid soils and measures for increasing their efficiency for growing rice (Oryza sativa L.)

  • B. N. Shinde
  • P. A. Sarangamath
  • S. Patnaik


Laboratory incubation experiments showed that addition of rock phosphate to P-deficient acid red and laterite soils resulted in an increase in Al−P or/and Fe−P, with a consequent decrease in Ca−P during 15 days, of moist aerobic incubation. The transformations of P from Gafsa, Jordan, North Carolina and Florida rock phosphates were more than those from Tennessee, Missouri and Udaipur. Studies with North Carolina, Gafsa, and Udaipur rock phosphates showed that application of the former two to moist aerobic P-deficient acid soils 2 weeks prior to flooding and transplanting rice gave higher content of Al−P, Fe−P and Bray-P, compared to when these were applied at flooding. The grain yields obtained with the former two treatments were also at par with that obtained with the addition of superphosphate at comparable rate (100 ppm) of P application, compared to when the, rock phosphates were applied at flooding, where the grain yields were lower than the superphosphate treatment, indicating that some of these rock phosphates could be made as efficient as superphosphate for growing rice on acid soils by their application to moist aerobic soil, 2–3 weeks prior to flooding and transplanting rice and thus conserve some amount of sulphur required for the manufacture of water soluble phosphates.


Phosphorus Acid Soil Comparable Rate Oryza Sativa Rock Phosphate 
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  1. 1.
    Basak, M. N. and Bhattacharya, R., Phosphate transformations in rice soils. Soil Sci.94, 258–262 (1962).Google Scholar
  2. 2.
    Basu, S. N. and Mukherjee, S. K., Phosphorus availability from different forms of iron, aluminium and calcium phosphates. J. Indian Soc. Soil Sci.17, 391–397 (1969).Google Scholar
  3. 3.
    Chakravarty, S. N. and Ghosal, T. K., Anaerobic reduction and phosphate solubility. J. Indian Soc. Soil Sci.16, 415–418 (1968).Google Scholar
  4. 4.
    Chang, S. C., Chu, W. K. and Erh, K. T., Determination, of reductant soluble phosphate in soils. Soil Sci.102, 44–45 (1966).Google Scholar
  5. 5.
    Chang, S. C. and Jackson, M. L., Fractionation of soil phosphorus. Soil Sci.84, 133–144 (1957).Google Scholar
  6. 6.
    Engelstad, O. P., Getsinger, J. G., and Stangel, P. G., Tailoring of fertilizers for rice. Annual Progress Report, TVA-AID Project Bull. Y-52, pp. 56 (1972).Google Scholar
  7. 7.
    Fiske, C. H. and Subbarow, Y., The colorimetric determination of phosphorus. J. Biol. Chem.66, 375–400 (1925).Google Scholar
  8. 8.
    Jackson, M. L. Soil Chemical Analysis. First Indian Printing, Pretice Hall of India (P) Ltd. pp. 134–182 (1967).Google Scholar
  9. 9.
    Lehr, J. R. and McClellan, G. H., A revised laboratory reactivity, scale for evaluating phosphate rocks for direct application. National Fertilizer Centre, TVA, Bull. Y 43, pp. 36 (1972).Google Scholar
  10. 10.
    Patrick, W. H. jr. and Mahapatra, I. C., Transformation and availability to rice of nitrogen and phosphorus in water, logged soils. Adv. Agron.20, 323–359 (1968).Google Scholar
  11. 11.
    Sarangamath, P. A., Shinde, B. N. and Patnaik, S., Efficiency of water soluble, citric acid soluble and insoluble phosphate fertilizers, for rice in different soils. Indian J. Agric. Sci.45 106–111 (1975).Google Scholar
  12. 12.
    Sarangamath, P. A., Shinde, B. N. and Patnaik, S., P32 tracer studies on the method of increasing the efficiency of citrate soluble and insoluble phosphates for rice on acid soils. Soil Sci.124, 40–44 (1977).Google Scholar
  13. 13.
    Sarangamath, P. A., Shinde, B. N. and Patnaik, S. Effect of application of water and citrate soluble and insoluble phosphates on the transformation of in organic P fractions and its relation with available P in different soils. In dian J. Agric. Sci.47, 309–313 (1977).Google Scholar

Copyright information

© Martinus Nijhoff 1978

Authors and Affiliations

  • B. N. Shinde
    • 1
  • P. A. Sarangamath
    • 1
  • S. Patnaik
    • 1
  1. 1.Central Rice Research InstituteCuttackIndia

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