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

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

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

Externe Organisationen

  • Martin-Luther-Universität Halle-Wittenberg
  • Technische Universität München (TUM)
  • Georg-August-Universität Göttingen
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer107841
FachzeitschriftSoil Biology and Biochemistry
Jahrgang147
Frühes Online-Datum18 Mai 2020
PublikationsstatusVeröffentlicht - Aug. 2020

Abstract

Denitrification usually takes place under anoxic conditions and over short periods of time, and depends on readily available nitrate and carbon sources. Variations in CO2 and N2O emissions associated with plant residues have mainly been explained by differences in their decomposability. A factor rarely considered so far is water-extractable organic matter (WEOM) released to the soil during residue decomposition. Here, we examined the potential effect of plant residues on denitrification with special emphasis on WEOM. A range of fresh and leached plant residues was characterized by elemental analyses, 13C-NMR spectroscopy, and extraction with ultrapure water. The obtained solutions were analyzed for the concentrations of organic carbon (OC) and organic nitrogen (ON), and by UV-VIS spectroscopy. To test the potential denitrification induced by plant residues or three different OM solutions, these carbon sources were added to soil suspensions and incubated for 24 h at 20 °C in the dark under anoxic conditions; KNO3 was added to ensure unlimited nitrate supply. Evolving N2O and CO2 were analyzed by gas chromatography, and acetylene inhibition was used to determine denitrification and its product ratio. The production of all gases, as well as the molar (N2O + N2)–N/CO2–C ratio, was directly related to the water-extractable OC (WEOC) content of the plant residues, and the WEOC increased with carboxylic/carbonyl C and decreasing OC/ON ratio of the plant residues. Incubation of OM solutions revealed that the molar (N2O + N2)–N/CO2–C ratio and share of N2O are influenced by the WEOM's chemical composition. In conclusion, our results emphasize the potential of WEOM in largely undecomposed plant residues to support short-term denitrification activity in a typical ˈhot spot–hot momentˈ situation.

ASJC Scopus Sachgebiete

Zitieren

Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition. / Surey, Ronny; Schimpf, Corinna M.; Sauheitl, Leopold et al.
in: Soil Biology and Biochemistry, Jahrgang 147, 107841, 08.2020.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Surey, R., Schimpf, C. M., Sauheitl, L., Mueller, C. W., Rummel, P. S., Dittert, K., Kaiser, K., Böttcher, J., & Mikutta, R. (2020). Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition. Soil Biology and Biochemistry, 147, Artikel 107841. https://doi.org/10.1016/j.soilbio.2020.107841
Surey R, Schimpf CM, Sauheitl L, Mueller CW, Rummel PS, Dittert K et al. Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition. Soil Biology and Biochemistry. 2020 Aug;147:107841. Epub 2020 Mai 18. doi: 10.1016/j.soilbio.2020.107841
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title = "Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition",
abstract = "Denitrification usually takes place under anoxic conditions and over short periods of time, and depends on readily available nitrate and carbon sources. Variations in CO2 and N2O emissions associated with plant residues have mainly been explained by differences in their decomposability. A factor rarely considered so far is water-extractable organic matter (WEOM) released to the soil during residue decomposition. Here, we examined the potential effect of plant residues on denitrification with special emphasis on WEOM. A range of fresh and leached plant residues was characterized by elemental analyses, 13C-NMR spectroscopy, and extraction with ultrapure water. The obtained solutions were analyzed for the concentrations of organic carbon (OC) and organic nitrogen (ON), and by UV-VIS spectroscopy. To test the potential denitrification induced by plant residues or three different OM solutions, these carbon sources were added to soil suspensions and incubated for 24 h at 20 °C in the dark under anoxic conditions; KNO3 was added to ensure unlimited nitrate supply. Evolving N2O and CO2 were analyzed by gas chromatography, and acetylene inhibition was used to determine denitrification and its product ratio. The production of all gases, as well as the molar (N2O + N2)–N/CO2–C ratio, was directly related to the water-extractable OC (WEOC) content of the plant residues, and the WEOC increased with carboxylic/carbonyl C and decreasing OC/ON ratio of the plant residues. Incubation of OM solutions revealed that the molar (N2O + N2)–N/CO2–C ratio and share of N2O are influenced by the WEOM's chemical composition. In conclusion, our results emphasize the potential of WEOM in largely undecomposed plant residues to support short-term denitrification activity in a typical ˈhot spot–hot momentˈ situation.",
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author = "Ronny Surey and Schimpf, {Corinna M.} and Leopold Sauheitl and Mueller, {Carsten W.} and Rummel, {Pauline S.} and Klaus Dittert and Klaus Kaiser and J{\"u}rgen B{\"o}ttcher and Robert Mikutta",
note = "Funding Information: This study was funded by the Deutsche Forschungsgemeinschaft within the research unit RU 2337: “ Denitrification in Agricultural Soils: Integrated Control and Modeling at Various Scales (DASIM) ” (Grants MI 1377/8-1, BO 1299/11-1 ). We are grateful to Christine Krenkewitz, Gudrun Nemson-von Koch, and Alexandra Boritzki for laboratory assistance, Isabel Prater for NMR spectroscopy analyses, and Anne Herwig for gas measurements. ",
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Download

TY - JOUR

T1 - Potential denitrification stimulated by water-soluble organic carbon from plant residues during initial decomposition

AU - Surey, Ronny

AU - Schimpf, Corinna M.

AU - Sauheitl, Leopold

AU - Mueller, Carsten W.

AU - Rummel, Pauline S.

AU - Dittert, Klaus

AU - Kaiser, Klaus

AU - Böttcher, Jürgen

AU - Mikutta, Robert

N1 - Funding Information: This study was funded by the Deutsche Forschungsgemeinschaft within the research unit RU 2337: “ Denitrification in Agricultural Soils: Integrated Control and Modeling at Various Scales (DASIM) ” (Grants MI 1377/8-1, BO 1299/11-1 ). We are grateful to Christine Krenkewitz, Gudrun Nemson-von Koch, and Alexandra Boritzki for laboratory assistance, Isabel Prater for NMR spectroscopy analyses, and Anne Herwig for gas measurements.

PY - 2020/8

Y1 - 2020/8

N2 - Denitrification usually takes place under anoxic conditions and over short periods of time, and depends on readily available nitrate and carbon sources. Variations in CO2 and N2O emissions associated with plant residues have mainly been explained by differences in their decomposability. A factor rarely considered so far is water-extractable organic matter (WEOM) released to the soil during residue decomposition. Here, we examined the potential effect of plant residues on denitrification with special emphasis on WEOM. A range of fresh and leached plant residues was characterized by elemental analyses, 13C-NMR spectroscopy, and extraction with ultrapure water. The obtained solutions were analyzed for the concentrations of organic carbon (OC) and organic nitrogen (ON), and by UV-VIS spectroscopy. To test the potential denitrification induced by plant residues or three different OM solutions, these carbon sources were added to soil suspensions and incubated for 24 h at 20 °C in the dark under anoxic conditions; KNO3 was added to ensure unlimited nitrate supply. Evolving N2O and CO2 were analyzed by gas chromatography, and acetylene inhibition was used to determine denitrification and its product ratio. The production of all gases, as well as the molar (N2O + N2)–N/CO2–C ratio, was directly related to the water-extractable OC (WEOC) content of the plant residues, and the WEOC increased with carboxylic/carbonyl C and decreasing OC/ON ratio of the plant residues. Incubation of OM solutions revealed that the molar (N2O + N2)–N/CO2–C ratio and share of N2O are influenced by the WEOM's chemical composition. In conclusion, our results emphasize the potential of WEOM in largely undecomposed plant residues to support short-term denitrification activity in a typical ˈhot spot–hot momentˈ situation.

AB - Denitrification usually takes place under anoxic conditions and over short periods of time, and depends on readily available nitrate and carbon sources. Variations in CO2 and N2O emissions associated with plant residues have mainly been explained by differences in their decomposability. A factor rarely considered so far is water-extractable organic matter (WEOM) released to the soil during residue decomposition. Here, we examined the potential effect of plant residues on denitrification with special emphasis on WEOM. A range of fresh and leached plant residues was characterized by elemental analyses, 13C-NMR spectroscopy, and extraction with ultrapure water. The obtained solutions were analyzed for the concentrations of organic carbon (OC) and organic nitrogen (ON), and by UV-VIS spectroscopy. To test the potential denitrification induced by plant residues or three different OM solutions, these carbon sources were added to soil suspensions and incubated for 24 h at 20 °C in the dark under anoxic conditions; KNO3 was added to ensure unlimited nitrate supply. Evolving N2O and CO2 were analyzed by gas chromatography, and acetylene inhibition was used to determine denitrification and its product ratio. The production of all gases, as well as the molar (N2O + N2)–N/CO2–C ratio, was directly related to the water-extractable OC (WEOC) content of the plant residues, and the WEOC increased with carboxylic/carbonyl C and decreasing OC/ON ratio of the plant residues. Incubation of OM solutions revealed that the molar (N2O + N2)–N/CO2–C ratio and share of N2O are influenced by the WEOM's chemical composition. In conclusion, our results emphasize the potential of WEOM in largely undecomposed plant residues to support short-term denitrification activity in a typical ˈhot spot–hot momentˈ situation.

KW - Chemical composition of organic matter

KW - Crop residues

KW - Denitrification potential

KW - NO/(NO+N) ratio

KW - Root exudates

KW - Water-extractable organic carbon

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U2 - 10.1016/j.soilbio.2020.107841

DO - 10.1016/j.soilbio.2020.107841

M3 - Article

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VL - 147

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

SN - 0038-0717

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ER -

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