Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition

Surey, Ronny; Schimpf, Corinna M.; Sauheitl, Leopold; Mueller, Carsten W.; Rummel, Pauline Sophie; Dittert, Klaus; Kaiser, Klaus; Böttcher, Jürgen; Mikutta, Robert

doi:10.1016/j.soilbio.2020.107841

Cited by 49 publications

(26 citation statements)

References 39 publications

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“…In accordance with effects discussed in the previous section, additions of soil-derived POM resulted also in higher molar (N 2 O + N 2 )-N/CO 2 -C ratios than MOM additions, the ratio being maximum for the Fu soil with POM addition (Table 5). This supports the idea that the product ratios of denitrification respond to the chemical composition of WEOM (Surey et al, 2020b) and again indicates a higher quality and use efficiency of WEOM derived from plant residues than from MOM.…”

Section: Effect Of Organic Matter Fractions On Denitrification Product Ratiossupporting

confidence: 81%

“…Due to the small WEOC contents of the Fu POM, rapid depletion of such readily available C compounds could be the reason for the declining effect of added Fu POM on cumulative N 2 O + N 2 already after 6 h, when the maximum was reached (Figure 2B). Thus, as already shown in a previous study (Surey et al, 2020b), potential denitrification depends not only on the plant residues' content of WEOM but also on its chemical composition (e.g., C/N ratio, aromaticity, shares of sugars, and organic acids). Consequently, when predicting denitrification potentials of different soils, the quantity of WEOC as well as its quality needs to be considered.…”

Section: Effect Of Organic Matter Fractions On Potential Denitrification and Co 2 Productionsupporting

confidence: 70%

“…This might also explain why denitrification 'hot spots' are often linked to POM (e.g., Parkin, 1987;Parry et al, 2000). Further, the lower contribution of POM-derived WEOC to CO 2 emissions than to cumulative N gas emissions for all three soils (Figures 3A-I) reflects higher molar (N 2 O + N 2 )-N/CO 2 -C product ratios for POM than for MOM additions and emphasizes again the importance of plant residues as a C source for denitrifying organisms (e.g., Bremner and Shaw, 1958;Burford and Bremner, 1975;Surey et al, 2020b). However, the estimated contributions of Gi POM and MOM to total gas emissions were almost similar (Figures 3B,E,H), basically due to the relatively large WEOC contents of the MOM fraction (Table 3).…”

Section: Estimation Of Potential Denitrification Based On Functional Organic Matter Fractionsmentioning

confidence: 89%

“…As described in Surey et al (2020b), gas samples (18 ml) were taken after 0, 2, 4, 6, 8, and 24 h, using a gastight syringe (25 ml, 25MDR-LL-GT; SGE Analytical Science Pty. Ltd., Ringwood, VIC, Australia), equipped with a push button valve (Luer Lock; SGE Analytical Science) and a 0.7-mm ID cannula (Sterican G26, 25 mm; B. Braun AG, Melsungen, Germany), and then transferred into preevacuated (90 mbar residual pressure, flushed with He) 12 ml Exetainer vials, which were sealed with a double septum cap (IVAVC329; IVA Analysentechnik e.k., Meerbusch, Germany).…”

Section: Incubation Gas Measurements and Calculationsmentioning

confidence: 99%

“…While WEOM leached from fresh plant residues and bacterial extracellular polymeric substances is rich in hydrophilic components, such as polysaccharides, WEOM derived from well-humified forest floor layers typically is enriched in phenolic compounds, such as lignin or lignocellulose, and, thus, is much less biodegradable (Kalbitz et al, 2003a, Kalbitz et al, 2003bMarschner and Kalbitz, 2003). In previous studies, we have shown that water-extractable OC (WEOC) is a straightforward indicator of the denitrification potential of soils, well related to the chemical composition of the source materials, such as POM and fresh plant residues (Surey et al, 2020a;Surey et al, 2020b). A substantial role in denitrification of POM with adhering microorganisms has been also suggested by Parkin (1987) and Parry et al (2000).…”

Section: Introductionmentioning

confidence: 99%

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Contribution of Particulate and Mineral-Associated Organic Matter to Potential Denitrification of Agricultural Soils

Surey

Kaiser

Schimpf

et al. 2021

Front. Environ. Sci.

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Water-extractable organic carbon (WEOC) is considered as the most important carbon (C) source for denitrifying organisms, but the contribution of individual organic matter (OM) fractions (i.e., particulate (POM) and mineral-associated (MOM)) to its release and, thus, to denitrification remains unresolved. Here we tested short-time effects of POM and MOM on potential denitrification and estimated the contribution of POM- and MOM-derived WEOC to denitrification and CO2 production of three agricultural topsoils. Suspensions of bulk soils with and without addition of soil-derived POM or MOM were incubated for 24 h under anoxic conditions. Acetylene inhibition was used to determine the potential denitrification and respective product ratio at constant nitrate supply. Normalized to added OC, effects of POM on CO2 production, total denitrification, and its product ratios were much stronger than those of MOM. While the addition of OM generally increased the (N2O + N2)-N/CO2-C ratio, the N2O/(N2O + N2) ratio changed differently depending on the soil. Gas emissions and the respective shares of initial WEOC were then used to estimate the contribution of POM and MOM-derived WEOC to total CO2, N2O, and N2O + N2 production. Water-extractable OC derived from POM accounted for 53–85% of total denitrification and WEOC released from MOM accounted for 15–47%. Total gas emissions from bulk soils were partly over- or underestimated, mainly due to nonproportional responses of denitrification to the addition of individual OM fractions. Our findings show that MOM plays a role in providing organic substrates during denitrification but is generally less dominant than POM. We conclude that the denitrification potential of soils is not predictable based on the C distribution over POM and MOM alone. Instead, the source strength of POM and MOM for WEOC plus the WEOC’s quality turned out as the most decisive determinants of potential denitrification.

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Section: Effect Of Organic Matter Fractions On Denitrification Product Ratiossupporting

confidence: 81%

Section: Effect Of Organic Matter Fractions On Potential Denitrification and Co 2 Productionsupporting

confidence: 70%

Section: Estimation Of Potential Denitrification Based On Functional Organic Matter Fractionsmentioning

confidence: 89%

Section: Incubation Gas Measurements and Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Contribution of Particulate and Mineral-Associated Organic Matter to Potential Denitrification of Agricultural Soils

Surey

Kaiser

Schimpf

et al. 2021

Front. Environ. Sci.

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Flush of Nitrous Oxide Emissions from Plastic Greenhouse Soil during Initial Application of Poultry Manure

Bai

Luo

Jiang

et al. 2022

CLEAN Soil Air Water

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Poultry manure, which contains abundant water‐soluble organic matter (WSOM), is commonly applied in plastic greenhouse vegetable production. There is little research on whether WSOM stimulates nitrous oxide (N2O) emission after poultry manure application. A 30 day incubation experiment and a field experiment are conducted to investigate the response of the N2O flux after poultry manure or WSOM inputs. The cumulative N2O emissions from soil amended with WSOM in the incubation experiment are two to four times than those from unamended soil. Similarly, in the field experiment, the N2O emissions significantly increased by 225% (to 1.13 kg N ha−1) after poultry manure and irrigation application compared to a control during summer fallow season, accounting for ≈20% of the annual N2O emissions from plastic greenhouse vegetable production. In conclusion, WSOM in poultry manure increases N2O emissions from plastic greenhouse soil during its initial application; moreover, N2O emissions during summer fallow season should be included in the N2O emission inventory of plastic greenhouse vegetable production. Measures for controlling N2O emissions such as avoiding nitrate accumulation and improving water and poultry manure management should be adopted in plastic greenhouse vegetable production.

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The anaerobic soil volume as a controlling factor of denitrification: a review

Schlüter,

Lucas,

Grosz

et al. 2024

Biol Fertil Soils

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Denitrification is an important component of the nitrogen cycle in soil, returning reactive nitrogen to the atmosphere. Denitrification activity is often concentrated spatially in anoxic microsites and temporally in ephemeral events, which presents a challenge for modelling. The anaerobic fraction of soil volume can be a useful predictor of denitrification in soils. Here, we provide a review of this soil characteristic, its controlling factors, its estimation from basic soil properties and its implementation in current denitrification models. The concept of the anaerobic soil volume and its relationship to denitrification activity has undergone several paradigm shifts that came along with the advent of new oxygen and microstructure mapping techniques. The current understanding is that hotspots of denitrification activity are partially decoupled from air distances in the wet soil matrix and are mainly associated with particulate organic matter (POM) in the form of fresh plant residues or manure. POM fragments harbor large amounts of labile carbon that promote local oxygen consumption and, as a result, these microsites differ in their aeration status from the surrounding soil matrix. Current denitrification models relate the anaerobic soil volume fraction to bulk oxygen concentration in various ways but make little use of microstructure information, such as the distance between POM and air-filled pores. Based on meta-analyses, we derive new empirical relationships to estimate the conditions for the formation of anoxia at the microscale from basic soil properties and we outline how these empirical relationships could be used in the future to improve prediction accuracy of denitrification models at the soil profile scale.

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Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition

Cited by 49 publications

References 39 publications

Contribution of Particulate and Mineral-Associated Organic Matter to Potential Denitrification of Agricultural Soils

Contribution of Particulate and Mineral-Associated Organic Matter to Potential Denitrification of Agricultural Soils

Flush of Nitrous Oxide Emissions from Plastic Greenhouse Soil during Initial Application of Poultry Manure

The anaerobic soil volume as a controlling factor of denitrification: a review

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