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Organic matter, heterotrophic activity, and NO· consumption in soils
Author(s) -
Dunfield Peter F.,
Knowles Roger
Publication year - 1998
Publication title -
global change biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.146
H-Index - 255
eISSN - 1365-2486
pISSN - 1354-1013
DOI - 10.1046/j.1365-2486.1998.00123.x
Subject(s) - soil water , gleysol , heterotroph , organic matter , environmental science , manure , environmental chemistry , nitrification , soil organic matter , chemistry , agronomy , fertilizer , soil science , nitrogen , biology , bacteria , genetics , organic chemistry
When the effect of water content was minimized, soil CO 2 evolution and soil organic matter content were good predictors of aerobic NO. uptake rate constants across a wide range of soil types. Field manure application to a Gleysol stimulated NO. uptake rate constants and lowered NO. compensation points compared to unfertilized or NH 4 NO 3 ‐fertilized soil. This effect lasted for months after manure application. In a laboratory experiment, addition of manure reduced the NO. efflux associated with nitrification of NH 4 Cl fertilizer, and manured soils had a greater capacity to remove NO. from polluted air. Evidence is presented that these observations result from NO. oxidation during heterotrophic microbial activity in soil.