Affiliation:
1. Department of Agronomy, Iowa State University, Ames, Iowa 50011
2. Department of Microbiology, University of Minnesota, Minneapolis, Minnesota 55455
Abstract
Gas chromatographic studies showed that nitrous oxide was produced in each instance when sterilized (autoclaved) soil was incubated after treatment with ammonium sulfate and inoculation with pure cultures of ammonia-oxidizing chemoautotrophic microorganisms (strains of
Nitrosomonas, Nitrosospira
, and
Nitrosolobus
). Production of N
2
O in ammonium-treated sterilized soil inoculated with
Nitrosomonas europaea
increased with the concentration of ammonium and the moisture content of the soil and was completely inhibited by both nitrapyrin and acetylene. Similar effects of nitrapyrin, acetylene, ammonium concentration, and soil moisture content were observed in studies of factors affecting N
2
O production in nonsterile soil treated with ammonium sulfate. These observations support the conclusion that, at least under some conditions, most of the N
2
O evolved from soils treated with ammonium or ammonium-producing fertilizers is generated by chemoautotrophic nitrifying microorganisms during oxidation of ammonium to nitrite.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
136 articles.
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