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Soil Science Society of America Journal Abstract -

Losses of Nitrogen from Some Flooded Soils in Tracer Experiments1


This article in SSSAJ

  1. Vol. 35 No. 6, p. 922-926
    Received: Apr 13, 1971
    Accepted: June 15, 1971

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  1. F. E. Broadbent and
  2. M. E. Tusneem2



Nitrogen losses were measured in laboratory and greenhouse experiments in four flooded soils after addition of 15N-tagged (NH4)2SO4 or rice straw after various incubation periods. Substantial losses occurred in all cases except where NH4+-N was rapidly immobilized and/or fixed by clay minerals. The necessity for nitrification as a prelude to N loss was demonstrated by showing that no loss occurred when oxygen was excluded and that where no nitrate was produced, no N2 was evolved. Growing rice plants (Oryza sativa) effectively reduced the magnitude of the nitrogen loss.

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