Research@Lincoln
    • Login
     
    View Item 
    •   Research@Lincoln Home
    • Faculty of Agriculture and Life Sciences
    • Department of Soil and Physical Sciences
    • View Item
    •   Research@Lincoln Home
    • Faculty of Agriculture and Life Sciences
    • Department of Soil and Physical Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Soil respiratory quotient determined via barometric process separation combined with nitrogen-15 labeling

    Müller, C.; Abbasi, M. K.; Kammann, C.; Clough, Timothy J.; Sherlock, Robert R.; Stevens, R. J.; Jäger, H.-J.
    Abstract
    The 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.... [Show full abstract]
    Keywords
    gross nitrification rates; barometric process separation (BaPS); ¹⁵N labeling technique; soil respiratory quotient; Agronomy & Agriculture
    Fields of Research
    05 Environmental Sciences; 06 Biological Sciences; 07 Agricultural and Veterinary Sciences
    Date
    2004
    Type
    Journal Article
    Collections
    • Department of Soil and Physical Sciences [411]
    Share this

    on Twitter on Facebook on LinkedIn on Reddit on Tumblr by Email

    Thumbnail
    View/Open
    Soil_Respiratory_Quotient.pdf
    DOI
    https://doi.org/10.2136/sssaj2004.1610
    Metadata
     Expand record
    Copyright © 2004 Soil Science Society of America
    Citation
    Müller, 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.
    This service is managed by Learning, Teaching and Library
    • Archive Policy
    • Copyright and Reuse
    • Deposit Guidelines and FAQ
    • Contact Us
     

     

    Browse

    All of Research@LincolnCommunities & CollectionsTitlesAuthorsKeywordsBy Issue DateThis CollectionTitlesAuthorsKeywordsBy Issue Date

    My Account

    LoginRegister

    Statistics

    View Usage Statistics
    This service is managed by Learning, Teaching and Library
    • Archive Policy
    • Copyright and Reuse
    • Deposit Guidelines and FAQ
    • Contact Us