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Measurement of Nitrous Oxide Dissolved in Soil Solution
Author(s) -
Davidson E. A.,
Firestone M. K.
Publication year - 1988
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1988.03615995005200040060x
Subject(s) - lysimeter , nitrous oxide , soil water , environmental chemistry , environmental science , chemistry , hydrology (agriculture) , soil science , geology , geotechnical engineering , organic chemistry
Degassing of soil solution as soil water enters springs and streams may be a significant pathway of N 2 O 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 N 2 gas; a vacuum was applied with an evacuated serum bottle; and solution and gases were captured in the bottle. Concentrations of N 2 O in soil solution of a grassland in central California varied from below ambient to 13 times ambient. At a wet riparian zone site, N 2 O in soil solution appeared to be related to NO ‐ 3 concentration, which can be determined from the same soil solution sample.