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Agronomy Journal Abstract -

Effect of Phosphorus on Nitrate in Sugar Beet (Beta vulgaris L.)


This article in AJ

  1. Vol. 62 No. 1, p. 91-92
    Received: July 17, 1969

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  1. F. J. Hills,
  2. R. L. Sailsbery,
  3. Albert Ulrich and
  4. K. M. Sipitanos2



Culture-solution and field experiments indicate that P-deficient sugar beets, particularly young plants, do not take up nitrate as well as plants adequately supplied with P. The increase in concentration of NO3-N in whole tops of young seedlings, cotyledons, or petioles of first true leaves with increased P supply is greater than can be accounted for by a concomitant decrease in percent dry-matter of these plant parts. The decreased absorption of NO3 by P-deficient plants in aerated culture-solution, with all roots exposed continuously to high concentrations of NO3 indicates that the phenomenon reflects not merely increased root extension but a physiological aberration brought about by P-deficiency.

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