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Entrapment of Nitrogen‐15 Dinitrogen During Soil Denitrification
Author(s) -
Lindau C. W.,
Patrick W. H.,
Delaune R. D.,
Reddy K. R.,
Bollich P. 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/sssaj1988.03615995005200020045x
Subject(s) - denitrification , loam , nitrogen , urea , chemistry , environmental science , environmental chemistry , soil water , soil science , organic chemistry
Denitrification has been proposed to be a major N loss mechanism from flooded systems, but direct measurement of the N 2 product has met with little success. A laboratory experiment was undertaken to determine if 15 N‐labeled dinitrogen gas was encapsulated in the saturated soil after applied 15 N was denitrified in a Crowley silt loam (Typic Albaqualfs) soil. Under laboratory conditions, 28% of the applied 15 N‐urea and 40% of the 15 N‐KNO 3 was trapped as N 2 in the soil 33 d after N application. In addition, 77% of the applied 15 NO ‐ 3 and 44% of the 15 N‐urea was denitrified and recovered as N 2 .