Title: Microbial O 2 consumption as a function of pore structure in soils of sorghum, switchgrass, and prairie vegetation systems

Journal Article · · Vadose Zone Journal
DOI: https://doi.org/10.1002/vzj2.70001 · OSTI ID:2511154
ORCiD logo [1];  [1];  [1]
  1. Department of Plant Soil and Microbial Sciences Michigan State University East Lansing Michigan USA, Great Lakes Bioenergy Research Center Michigan State University East Lansing Michigan USA
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Abstract Microscale O 2 availability in soil, a main factor influencing microbial processing of soil carbon and nitrogen, is a function of O 2 diffusion and microbial O 2 consumption. While O 2 diffusivity is widely studied, it is difficult to quantify the rate of microbial O 2 consumption ( MO ). In this study, we quantified the MO using O 2 microsensor profiling to compare MO in different soils and vegetation systems while manipulating the soil pore structure. Soil samples were collected from three bioenergy vegetation systems, sorghum ( Sorghum bicolor L. Moench), switchgrass ( Panicum virgatum L.), and prairie, at an experimental site in Southeast Michigan, and from switchgrass and prairie systems at two sites in South and North Wisconsin. We prepared soil cores with two contrasting pore structures, that is, large (>30 µm Ø) pore‐dominated soil (LP) and small (<10 µm Ø) pore‐dominated soil (SP), from the same 1‐ to 2‐mm soil size fraction. We quantified MO (nmol O 2 cm −3 s −1 ) using a microprofiler with an oxygen (OX‐100 µm) microsensor (Unisense) pre‐ and post‐38‐day incubation. Across all studied systems, there was a trend for a decrease in SP MO post‐incubation, suggesting a change in microbial metabolism to lower O 2 utilization. However, sizeable microbial O 2 consumption continued in the LP soils, further corroborated by a positive correlation between the C‐CO 2 emission rate and the post‐incubation MO , highlighting that LP provided a better physical microenvironment for the soil microbes.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0018409
OSTI ID:
2511154
Journal Information:
Vadose Zone Journal, Journal Name: Vadose Zone Journal Journal Issue: 1 Vol. 24; ISSN 1539-1663
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

References (35)

Oxygen and redox potential gradients in the rhizosphere of alfalfa grown on a loamy soil journal February 2015
Responses of nitrous oxide, dinitrogen and carbon dioxide production and oxygen consumption to temperature in forest and agricultural light-textured soils determined by model experiment journal October 2000
Microsensor analysis of oxygen and pH in the rice rhizosphere under field and laboratory conditions journal August 1999
Soil microbial communities under model biofuel cropping systems in southern Wisconsin, USA: Impact of crop species and soil properties journal March 2012
Soil pore size distribution shaped not only compositions but also networks of the soil microbial community journal February 2022
Fenton chemistry and reactive oxygen species in soil: Abiotic mechanisms of biotic processes, controls and consequences for carbon and nutrient cycling journal March 2021
Oxygen dynamics in a salt-marsh soil and in Suaeda maritima during tidal submergence journal August 2013
Early accumulation of active fraction soil carbon in newly established cellulosic biofuel systems journal May 2018
Relationship between soil carbon sequestration and the ability of soil aggregates to transport dissolved oxygen journal December 2021
Relationship between soil CO2 fluxes and soil moisture: Anaerobic sources explain fluxes at high water content journal June 2023
Interactions among soil texture, pore structure, and labile carbon influence soil carbon gains journal November 2023
Eight years organic amendment application alters N2O emission potential by increasing soil O2 consumption rate journal February 2022
Microbial biogeography at the soil pore scale journal February 2011
Soil respiration is not limited by reductions in microbial biomass during long-term soil incubations journal February 2015
Pore characteristics regulate priming and fate of carbon from plant residue journal October 2017
Soil microbial communities under different soybean cropping systems: Characterization of microbial population dynamics, soil microbial activity, microbial biomass, and fatty acid profiles journal May 2009
Oxygen Regulates Nitrous Oxide Production Directly in Agricultural Soils journal October 2019
Consider the Anoxic Microsite: Acknowledging and Appreciating Spatiotemporal Redox Heterogeneity in Soils and Sediments journal August 2023
Formation Factor and Permeability Equations journal April 1964
III. Experiments on the quantity of gases absorbed by water, at different temperatures, and under different pressures journal January 1803
Pore‐scale view of microbial turnover: Combining 14 C imaging, μCT and zymography after adding soluble carbon to soil pores of specific sizes journal August 2020
Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale journal September 2017
Oxygen availability regulates the quality of soil dissolved organic matter by mediating microbial metabolism and iron oxidation journal October 2022
Analysis of Messy Data Volume 1 book March 2009
Sensitivity of Soil Respiration to Variability in Soil Moisture and Temperature in a Humid Tropical Forest journal December 2013
Properties of Soil Pore Space Regulate Pathways of Plant Residue Decomposition and Community Structure of Associated Bacteria journal April 2015
The Diffusion and Consumption of Oxygen in Submerged Soils1 journal January 1971
Mass Transfer Studies in Sorbing Porous Media: II. Experimental Evaluation with Tritium (3H2O) journal March 1977
Direct Measurement of Oxygen Profiles and Denitrification Rates in Soil Aggregates1 journal January 1985
Field Techniques for Measuring Wetland Soil Parameters journal May 1989
Temporal Pattern of Oxygen Concentration in a Hydromorphic Soil journal January 1998
Predicting the Gas Diffusion Coefficient in Repacked Soil journal January 2000
Tortuosity, Diffusivity, and Permeability in the Soil Liquid and Gaseous Phases journal January 2001
Measurement and Modeling of Diffusive Tortuosity in Saturated Soils: A Pedotransfer Function Approach journal October 2014
Structure‐Dependent Water‐Induced Linear Reduction Model for Predicting Gas Diffusivity and Tortuosity in Repacked and Intact Soil journal June 2013

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