Autotrophic Oxidation of Ammonium as an Attribute
of the Net Mineralization of Nitrogen in Soil

R. S. Kutuzova, Zh. M. Tribis, and N. I. Vorob’ev

All-Russia Research Institute of Agricultural Microbiology,
sh. Podbel’skogo 3, Pushkin 8, St. Petersburg, 189620 Russia

Received November 25, 1996

Abstract—The result of complex interactions between autotrophic ammonium-oxidizing bacteria and het-
erotrophic microorganisms can be expressed in terms of ammonium oxidation intensity. This microbiological
feature serves as a relative characteristic of the net mineralization of nitrogen in soil matter. Net mineralized
yields a adequate amount of N only under weakly pronounced nitrate reduction.

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