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dc.contributor.authorMüller, C.en
dc.contributor.authorAbbasi, M. K.en
dc.contributor.authorKammann, C.en
dc.contributor.authorClough, Timothy J.en
dc.contributor.authorSherlock, Robert R.en
dc.contributor.authorStevens, R. J.en
dc.contributor.authorJäger, H.-J.en
dc.date.accessioned2008-06-18T02:53:14Z
dc.date.issued2004en
dc.identifier.citationMüller, C., Abbasi, M. K., Kammann, C., Clough, T. J., Sherlock, R. R., Stevens, R. J., & Jäger, H.-J. (2004). Soil respiratory quotient determined via barometric process separation combined with nitrogen-15 labeling. Soil Science Society of America Journal, 68(5), 1610-1615.en
dc.identifier.issn0361-5995en
dc.identifier.urihttps://hdl.handle.net/10182/541
dc.description.abstractThe barometric process separation (BaPS) and ¹⁵N dilution techniques were used to determine gross nitrification rates on the same soil cores from an old grassland soil. The BaPS-technique separates the O₂ consumption into that from nitrification and that from soil organic matter (SOM) respiration. The most sensitive parameter for the calculations via the BaPS technique is the respiratory quotient (RQ = ∆CO₂/∆O₂) for SOM turnover (RQSOM). Combining both methods (BaPS–¹⁵N ) allowed the determination of the RQSOM. The RQ value determined in such a way is adjusted for the influence of nitrification and denitrification, which are both characterized by totally different RQ values. The results for the grassland soil showed that 6 to 10% of O₂ was consumed by nitrification when incubated at 20°C and 0.49 g H₂O g⁻¹ soil. A set of BaPS measurements with the same soil at various temperature and moisture contents showed that up to 49% of the total O₂ consumption was due to nitrification. The calculated RQSOM values via the BaPS–¹⁵N technique presented here are more closely associated with the overall SOM turnover than the usual net RQ reported in the literature. Furthermore, the RQSOM value provides an overall indication of the decomposability and chemical characteristics of the respired organic material. Hence, it has the potential to serve as a single state index for SOM quality and therefore be a useful index for SOM turnover models based on substrate quality.en
dc.format.extent1610-1615en
dc.language.isoenen
dc.publisherSoil Science Society of Americaen
dc.relationThe original publication is available from - Soil Science Society of America - https://doi.org/10.2136/sssaj2004.1610en
dc.relation.urihttps://doi.org/10.2136/sssaj2004.1610en
dc.rightsCopyright © 2004 Soil Science Society of Americaen
dc.subjectgross nitrification ratesen
dc.subjectbarometric process separation (BaPS)en
dc.subject¹⁵N labeling techniqueen
dc.subjectsoil respiratory quotienten
dc.subjectAgronomy & Agricultureen
dc.titleSoil respiratory quotient determined via barometric process separation combined with nitrogen-15 labelingen
dc.typeJournal Article
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciencesen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
dc.identifier.doi10.2136/sssaj2004.1610en
dc.subject.anzsrc05 Environmental Sciencesen
dc.subject.anzsrc06 Biological Sciencesen
dc.subject.anzsrc07 Agricultural and Veterinary Sciencesen
dc.relation.isPartOfSoil Science Society of America Journalen
pubs.issue5en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume68en
lu.identifier.orcid0000-0002-5978-5274


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