Comparison of Permanganate‐Oxidizable Carbon and Mineralizable Carbon for Assessment of Organic Matter Stabilization and Mineralization
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Core Ideas: POXC and mineralizable C were evaluated across diverse agroecosystems. The two are related but differentially influenced by management practices. POXC better reflected SOM stabilizing practices. Mineralizable C reflected SOM mineralizing practices. Both predicted agronomic performance better than other soil C fractions. Permanganate‐oxidizable C (POXC) and mineralizable C (as determined by short‐term aerobic incubation of rewetted soil) are measures of active organic matter that may provide early indication of soil C stabilization and mineralization processes. To date, the relationship between these two promising active organic matter tests has not been comprehensively evaluated, and little is known about their functional role in the soil ecosystem. Here, we examined the relationship between POXC and mineralizable C across a wide range of soil types, management histories, and geographic locations across the United States (13 studies, 76 total sites; n = 1071) and the ability of POXC and mineralizable C to predict crop yield and total aboveground biomass. Results from this comparative analysis showed that POXC and mineralizable C are related (r 2 = 0.15–0.80) but that the relationship was differentially influenced by management practices. Overall, POXC better reflected practices that promote organic matter accumulation or stabilization and therefore can be a useful indicator of long‐term soil C sequestration. Conversely, mineralizable C better reflected practices that promote organic matter mineralization and therefore can be a useful indicator of short‐term soil nutrient availability. Our results also show that both mineralizable C and POXC were better predictors of corn (Zea mays L.) grain yield, aboveground biomass, and tomato (Solanum lycopersicum L.) fruit yield than other soil C fractions evaluated here. Thus, the integrated use of POXC and mineralizable C can provide a complementary framework to assess the relative dynamics of soil C stabilization and nutrient mineralization functions in agroecosystems.
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POXC and microbial respiration are both indicators of putatively microbially accessible C.
“POXC and microbial respiration are both indicators of putatively microbially accessible C (Burke et al., 2019; Culman et al., 2012; Hurisso et al., 2016) and may help illuminate the early plant-soil-microbial C dynamics in these systems.”
From Early production of switchgrass ( <i>Panicum virgatum</i> L.) and willow ( <i>Salix</i> spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil (2024) · cites this paper as Hurisso et al., 2016
The Abstract (page unavailable) calls both POXC and mineralizable C measures of active organic matter, and describes mineralizable C as CO₂ released during soil incubation. But the Relationship between Permanganate-Oxidizable and Mineralizable Carbon section (page unavailable) distinguishes the two: POXC is a chemically extracted fraction associated more with stabilized C, while mineralizable C integrates C lability and microbial metabolic potential. The paper therefore does not establish that both specifically indicate microbially accessible C. (LLM, conf=0.84)
Experimental — accuracy not yet measuredThe labile C fraction is closely associated with nutrient cycling and C accrual and is sensitive to land management changes.
“While potentially highly variable (Ladoni et al., 2015), the labile C fraction is closely associated with nutrient cycling and C accrual and is sensitive to land management changes (Culman et al., 2012; Hurisso et al., 2016).”
From Early production of switchgrass ( <i>Panicum virgatum</i> L.) and willow ( <i>Salix</i> spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil (2024) · cites this paper as Hurisso et al., 2016
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Stabilization mechanisms of soil organic matter: Implications for C-saturation of soils
Six, J., Conant, R. T., Paul, E. A., & Paustian, K. (2002) · Plant and Soil · doi:10.1023/a:1016125726789 · Cited by 4,633 · see citing works
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- Authors
- Hurisso, T. T., Culman, S. W., Horwath, W. R., Wade, J., Cass, D., Beniston, J. W., Bowles, T. M., Grandy, A. S., Franzluebbers, A. J., Schipanski, M. E., Lucas, S. T., & Ugarte, C. M.
- Affiliations
- The Ohio State University (US)
- Dep. of Land, Air and Water Resources Univ. of California Davis CA 95616
- University of California, Davis (US)
- Santa Rosa Junior College (US)
- University of New Hampshire (US)
- Agricultural Research Service (US)
- Colorado State University (US)
- Kentucky State University (US)
- University of Illinois Urbana-Champaign (US)
- Corresponding author
- Hurisso, Tunsisa T.
- Culman, Steve W.
- ORCID
- Venue
- Soil Science Society of America Journal
- Publisher
- Wiley
- Published
- 2016-09
- Volume
- 80
- Issue
- 5
- Pages
- 1352-1364
- ISSN
- 0361-5995 (ISSN-L)
- 1435-0661
- OpenAlex
- W2516199552
- Cited by
- 301
- References
- 1
- Citations by year
- 2026: 32 · 2025: 37 · 2024: 38 · 2023: 28 · 2022: 33 · 2021: 42 · 2020: 33 · 2019: 28 · 2018: 16 · 2017: 13 · 2016: 1
- FWCI
- 22.63
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Soil Science Society of America Journal (publishedVersion, cc-by-nc-nd)
- University of New Hampshire Scholars Repository (University of New Hampshire at Manchester) (submittedVersion, cc-by-nc-nd)
- Funders
- Ceres Trust
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Management and Crop Yield
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
- Keywords
- permanganate oxidizable carbon, mineralizable carbon, soil organic matter stabilization, soil organic matter mineralization, soil carbon sequestration, soil carbon fractions, crop yield prediction, aboveground biomass, agroecosystem management, soil nutrient mineralization
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