TY - JOUR
T1 - Evaluation of nitrogen-15 tracer techniques for direct measurement of denitrification in soil
T2 - II. Simulation studies
AU - Vanden Heuvel, R. M.
AU - Mulvaney, R. L.
AU - Hoeft, R. G.
PY - 1988
Y1 - 1988
N2 - In mass spectrometric procedures developed at the University of Illinois for determination of 15N-labeled dinitrogen (N2) and nitrous oxide (N2O) evolved from soils, the assumption is made that the nitrate (NO3) undergoing denitrification exists in a single pool that is isotopically uniform. Computer simulation studies were conducted to identify trends associated with errors in measuring denitrification of NO3- that exists in two or more pools having different enrichments. The results indicate that, for a constant mean 15N enrichment, the magnitude of the error increases as the range of enrichment becomes greater and can increase or decrease with increase in the number of NO3- pools, depending upon whether there is an increase in the range of enrichment. The error is also affected by the extent to which evolution is distributed among the various pools, but it does not depend upon the overall evolution rate or the 15N enrichment of the fertilizer applied.
AB - In mass spectrometric procedures developed at the University of Illinois for determination of 15N-labeled dinitrogen (N2) and nitrous oxide (N2O) evolved from soils, the assumption is made that the nitrate (NO3) undergoing denitrification exists in a single pool that is isotopically uniform. Computer simulation studies were conducted to identify trends associated with errors in measuring denitrification of NO3- that exists in two or more pools having different enrichments. The results indicate that, for a constant mean 15N enrichment, the magnitude of the error increases as the range of enrichment becomes greater and can increase or decrease with increase in the number of NO3- pools, depending upon whether there is an increase in the range of enrichment. The error is also affected by the extent to which evolution is distributed among the various pools, but it does not depend upon the overall evolution rate or the 15N enrichment of the fertilizer applied.
UR - http://www.scopus.com/inward/record.url?scp=0024163205&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024163205&partnerID=8YFLogxK
U2 - 10.2136/sssaj1988.03615995005200050021x
DO - 10.2136/sssaj1988.03615995005200050021x
M3 - Article
AN - SCOPUS:0024163205
SN - 0361-5995
VL - 52
SP - 1322
EP - 1326
JO - Soil Science Society of America Journal
JF - Soil Science Society of America Journal
IS - 5
ER -