A Closed, Well-oxygenated System for the Determination of the Emission of Carbon Dioxide, Nitrous Oxide, and Ammonia1
- P. Fine,
- A. Feigin and
- Y. Waisel2
A simple closed system was set up for the measurement of CO2, N2O, and NH3 emission from soil samples kept under well-oxygenated atmosphere. The system is an adaptation of a method suggested by Cornfield (1961a). Carbon dioxide is precipitated from the atmosphere as BaCO3, while O2 is generated from a BaO2 solution in equivalent amounts. With the aid of the proposed method, the simultaneous and quantitative determination of the mineral N forms in soils, of the gaseous N forms, and of CO2 may be performed even in well-oxygenated conditions. Tests carried out in incubated soilsludge mixtures indicated that gaseous N forms may constitute a large fraction of the organic N ammonified. This may result in an underestimation of the mineralization potential of the organic N. Gas measurement may be needed where losses of N gases are likely or for the testing of the suitability of incubation techniques for the assessment of N mineralization capacities. The method is especially useful for the study of C and N dynamics in soil-sludge mixtures.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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