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Published in Soil Sci Soc Am J 52:1201-1203 (1988)
© 1988 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Measurement of Nitrous Oxide Dissolved in Soil Solution

E. A. Davidson* and M. K. Firestone

Dep. of Plant and Soil Biology, 108 Hilgard Hall, Univ. of California, Berkeley, CA 94720

* Corresponding author.

ABSTRACT

Degassing of soil solution as soil water enters springs and streams may be a significant pathway of N2O release into the atmosphere. A simple method is presented to sample soil solution to include gases dissolved in solution. Small porous cup lysimeters connected to narrow diameter nylon tubing were flushed with N2 gas; a vacuum was applied with an evacuated serum bottle; and solution and gases were captured in the bottle. Concentrations of N2O in soil solution of a grassland in central California varied from below ambient to 13 times ambient. At a wet riparian zone site, N2O in soil solution appeared to be related to NO-3 concentration, which can be determined from the same soil solution sample.

NOTES

Contribution of the Dep. of Plant and Soil Biology.

Received for publication October 13, 1987.


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Copyright © 1988 by the Soil Science Society of America.