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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Permanganate oxidizable carbon reflects a processed soil fraction that is sensitive to management
Soil Science Society of America Journal, Volume 76, No. 2, Year 2012
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Description
Permanganate oxidizable C (POXC; i.e., active C) is a relatively new method that can quantify labile soil C rapidly and inexpensively. Despite limited reports of positive correlations with particulate organic C (POC), microbial biomass C (MBC), and other soil C fractions, little is known about what soil fractions POXC most closely refl ects. We measured POXC across a wide range of soil types, ecosystems, and geographic areas (12 studies, 53 total sites, n = 1379) to: (i) determine the relationship between POXC and POC, MBC and soil organic C (SOC) fractions, and (ii) determine the relative sensitivity of POXC as a labile soil C metric across a range of environmental and management conditions. Permanganate oxidizable C was signifi cantly related to POC, MBC, and SOC, and these relationships were strongest when data were analyzed by individual studies. Permanganate oxidizable C was more closely related to smaller-sized (53-250 μ m) than larger POC fractions (250- 2000 μ m), and more closely related to heavier (>1.7 g cm -3) than lighter POC fractions, indicating that it refl ects a relatively processed pool of labile soil C. Compared with POC, MBC, or SOC, POXC demonstrated greater sensitivity to changes in management or environmental variation in 42% of the signifi cant experimental factors examined across the 12 studies. Our analysis demonstrates the usefulness of POXC in quickly and inexpensively assessing changes in the labile soil C pool. © Soil Science Society of America.
Authors & Co-Authors
Culman, Steve W.
United States, East Lansing
Michigan State University
Snapp, Sieglinde S.
United States, East Lansing
Michigan State University
Schipanski, Meagan E.
United States, University Park
Pennsylvania State University
Lal, Rattan A.
United States, Columbus
The Ohio State University
Drinkwater, Laurie E.
United States, Ithaca
Cornell University
Franzluebbers, Alan J.
United States, Washington, D.c.
Usda Agricultural Research Service
Lee, Juhwan
United States, Davis
University of California, Davis
Six, Johan W.
United States, Beltsville
Usda Ars Beltsville Agricultural Research Center
Maul, Jude E.
United States, Beltsville
Usda Ars Beltsville Agricultural Research Center
Statistics
Citations: 411
Authors: 9
Affiliations: 10
Identifiers
Doi:
10.2136/sssaj2011.0286
ISSN:
14350661
Research Areas
Environmental