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Effect of Salts and Salts Plus Nitrogen‐15‐Labeled Ammonium Chloride on Mineralization of Soil Nitrogen, Nitrification, and Immobilization
Author(s) -
Westerman R. L.,
Tucker T. C.
Publication year - 1974
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/sssaj1974.03615995003800040024x
Subject(s) - chemistry , nitrification , ammonium , mineralization (soil science) , nitrogen , loam , inorganic chemistry , salt (chemistry) , sodium , calcium , ammonium chloride , chloride , nuclear chemistry , environmental chemistry , soil water , organic chemistry , environmental science , soil science
The effects of 0.0, 0.01, 0.1, and 1.0 M concentrations of sodium, copper and calcium chloride salts added to a Pima clay loam with and without 15 NH 4 Cl on mineralization of soil nitrogen, nitrification, and immobilization were measured over a 49‐day period. Dilute concentrations of salt, 15 NH 4 Cl, and dilute salts plus 15 NH 4 Cl stimulated mineralization of soil N. The “priming effect” was shown to be real and not just a simple exchange. Nitrification of native ammonium nitrogen and 15 N‐labeled ammonium decreased with increasing concentrations of salt. High concentrations of copper and calcium chloride salts inhibited nitrification of 15 N‐labeled ammonium more than sodium salts. Immobilization of 15 NH 4 + ‐N was decreased significantly by high concentrations of salt. Gaseous loss processes were decreased with increased salts.