ISSN:
1432-0789
Keywords:
Key words Humisol
;
Nitrate
;
Nitric oxide
;
Nitrite
;
Nitrogen dioxide
;
Acetylene
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Consumption of nitric oxide (NO) in a humisol was studied at 0.1–2 ppmv NO, a range representative of NO concentrations in ammonium-fertilized soil. Denitrification was not a major sink for NO. The principal NO-consuming reaction was a biological oxidation, leading ultimately to nitrate (NO3 –). Nitrogen dioxide (NO2) and nitrite (NO2 –) may have been intermediates in this pathway. An abiological reaction accounted for about 25% of the NO-consuming activity in soil at 90% H2O (d.w.) and 25oC, but contributed relatively more to total NO consumption at higher temperatures. Biological NO-consuming activity was highest at 25oC, while the abiological activity increased exponentially with temperature. The product of the abiological reaction was neither NO3 –, NO2 –, nor nitrous oxide (N2O), and the reaction did not require O2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003740050246
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