Use of Interfaced Gas Chromatography-Mass Spectrometry for Detection of Concurrent Mineralization and Denitrification in Soil1
- D. D. Focht,
- N. Valoras and
- J. Letey2
A method using an interfaced gas chromatograph-mass spectrometer (GC-MS) is described for measuring the amount of N2O and N2 derived during denitrification from tagged 15NO3− and from 14NO3−, the latter of which is produced during mineralization of soil organic matter. More mineralization and less denitrification was noted with the respective order related to air-filled pore content: 10%, 5%, 0 (saturated). Denitrification measured directly from the cumulative emissions of N2O and N2 was considerably underestimated by comparison to measuring denitrification by loss of 15NO3−.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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