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This article in SSSAJ

  1. Vol. 45 No. 6, p. 1124-1127
     
    Received: Mar 12, 1981
    Accepted: July 28, 1981


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doi:10.2136/sssaj1981.03615995004500060022x

Comparison of Effects of Nitrate, Nitrite, and Nitric Oxide on Reduction of Nitrous Oxide to Dinitrogen by Soil Microorganisms1

  1. J. F. Gaskell,
  2. A. M. Blackmer and
  3. J. M. Bremner2

Abstract

Abstract

Recent work has shown that nitrate inhibits reduction of nitrous oxide (N2O) to dinitrogen (N2) by soil microorganisms under anaerobic conditions. Studies to investigate the possibility that this inhibition is caused by nitrite or nitric oxide (NO) formed through microbial reduction of nitrate showed that both NO and nitrite inhibit reduction of N2O to N2 by soil microorganisms under anaerobic conditions (helium atmosphere) but that the inhibitory effect of NO on N2O reduction is much smaller than the effects of nitrate or nitrite. Comparison of the effects of nitrate, nitrite, and mixtures of nitrate and nitrite on reduction of N2O to N2 by soils incubated under He showed that nitrate per se inhibits N2O reduction and did not confirm a recent suggestion that the inhibitory effect of nitrate on N2O reduction is due to nitrite formed through microbial reduction of nitrate.

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