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Losses of Nitrogen from Some Flooded Soils in Tracer Experiments
Author(s) -
Broadbent F. E.,
Tusneem M. E.
Publication year - 1971
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/sssaj1971.03615995003500060023x
Subject(s) - nitrogen , soil water , oryza sativa , nitrification , incubation , nitrate , straw , chemistry , greenhouse , agronomy , tracer , environmental chemistry , environmental science , soil science , biology , biochemistry , organic chemistry , gene , physics , nuclear physics
Nitrogen losses were measured in laboratory and greenhouse experiments in four flooded soils after addition of 15 N‐tagged (NH 4 ) 2 SO 4 or rice straw after various incubation periods. Substantial losses occurred in all cases except where NH 4 + ‐N was rapidly immobilized and/or fixed by clay minerals. The necessity for nitrification as a prelude to N loss was demonstrated by showing that no loss occurred when oxygen was excluded and that where no nitrate was produced, no N 2 was evolved. Growing rice plants ( Oryza sativa ) effectively reduced the magnitude of the nitrogen loss.