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This article in SSSAJ

  1. Vol. 37 No. 3, p. 405-408
     
    Received: Nov 10, 1972
    Published: May, 1973


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doi:10.2136/sssaj1973.03615995003700030028x

Solution Phosphorus Concentration and Growth of Rice (Oryza sativa L.) in Flooded Soils1

  1. L. R. Hossner,
  2. J. A. Freeouf and
  3. B. L. Folsom2

Abstract

Abstract

Soil solution P concentration was monitored at weekly intervals during the vegetative growth of Rice (Oryza sativa L. var. ‘Bluebelle’) on flooded soils from the gulf coast region of Texas. Significant increases in dry matter production were obtained from application of phosphate fertilizer. Average soil solution P concentration ranged from 0.02 to 5.28 ppm when all soils and P fertilization rates were considered. A linear relationship was obtained between the logarithm of the average soil solution P concentration and the P concentration or P uptake of the plant. Yields were greater than 90% of maximum when the average soil solution P concentration was greater than 0.1 ppm. The concentration of P in the plant tissue at 0.1 ppm soil solution P was 0.25%.

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