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Cited by 80Soil Carbon and Nitrogen DynamicsBioenergy crop production and managementSoil erosion and sediment transport

Turnover of organic matter in a Miscanthus field: effect of time in Miscanthus cultivation and inorganic nitrogen supply

Foereid, Bente, de Neergaard, Andreas, Høgh-Jensen, Henning·2004·Soil Biology and Biochemistry
DOI 10.1016/j.soilbio.2004.03.002
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Abstract

To accurately predict the potential environmental benefits of energy crops, the sequestration of carbon in soil needs to be quantified. The aim of this study was to investigate the mineralisation rate of the perennial C4 grass Miscanthus giganteus and Miscanthus-derived soil organic matter under contrasting nitrogen supply. Soils were collected from sites where Miscanthus had been grown for 11 and 18 years, respectively, and where a C3-grass (Lolium spp.) had been grown for 7 years. The soils were incubated for 4 months at two levels of soil inorganic nitrogen with or without dead root material of Miscanthus. Addition of root material (residues) increased carbon mineralisation of indigenous organic matter when no nitrogen was added. Added inorganic nitrogen decreased carbon mineralisation in all soils. Nitrogen addition did not affect carbon mineralisation of the residues. Using the 13C fraction to calculate the proportion of respiratory CO2 derived from Miscanthus showed that nitrogen addition decreased carbon mineralisation in soils, but it did not affect carbon mineralisation of the residues. Nitrogen mineralisation was highest in the C3 grass soil without added residues. Nitrification decreased pH, especially in the treatments where nitrogen was added. The Miscanthus-derived organic matter is at least as stable as C3 grassland-derived organic matter. Furthermore, the turnover time of the organic matter increases with time under Miscanthus cultivation. The CENTURY soil organic matter sub-model was used to simulate the organic matter decomposition in the experiment. Carbon mineralisation was accurately simulated but there were unexplained discrepancies in the simulation of the delta13C in the respiration from the treatment with residues. The delta13C in respiration did not decrease with time as predicted, indicating that lignin accumulation did not influence the measurements.

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  • In vitro decomposition of Miscanthus litter was affected by nitrogen added as pig slurry rather than nitrogen added as fertiliser.

    “In vitro decomposition of Miscanthus litter was affected by N added as pig slurry [115] rather than N added as fertiliser [116].”

    From Carbon Sequestration by Perennial Energy Crops: Is the Jury Still Out? (2015) · cites this paper as [116]

  • Miscanthus litter is higher in lignin than other grasses and seems to reduce the turnover rate of existing soil organic carbon by increasing the insoluble carbon fraction resistant to microbial attack.

    “Miscanthus, whose litter is higher in lignin than other grasses [69], seems to reduce the turnover rate of existing SOC by increasing the insoluble C fraction resistant to microbial attack [116, 150].”

    From Carbon Sequestration by Perennial Energy Crops: Is the Jury Still Out? (2015) · cites this paper as [116]

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Authors
Foereid, B., de Neergaard, A., & Høgh-Jensen, H.
Corresponding author
Foereid, Bente
ORCID
Foereid, Bente
Venue
Soil Biology and Biochemistry
Publisher
Elsevier BV
Published
2004-07
Volume
36
Issue
7
Pages
1075-1085
ISSN
0038-0717 (ISSN-L)
DOI
10.1016/j.soilbio.2004.03.002
OpenAlex
W2095345919
Cited by
80
References
68
Citations by year
2026: 2 · 2025: 1 · 2023: 4 · 2022: 1 · 2021: 6 · 2020: 2 · 2019: 4 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 5 · 2014: 3 · 2013: 8 · 2012: 6
FWCI
4.10
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Soil Biology and Biochemistry (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
Keywords
Miscanthus × giganteus, soil organic matter turnover, carbon mineralization, energy crops, soil carbon sequestration, root residues, soil respiration, nitrification, soil pH, CENTURY model, lignin, ryegrass, organic matter stability

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