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Contribution of nitrogen fixation to first year Miscanthus × giganteus
Open accessAbstract
Many characteristics make Miscanthus × giganteus an appealing bioenergy feedstock in temperate North America, but the degree to which this plant species interacts with nitrogen‐fixing bacteria remains understudied. Demonstration of associative nitrogen fixation in Miscanthus would support management with minimal fertilizer inputs that is demanded of long‐term biofuel sustainability. As a first step, we investigate the role of biological nitrogen fixation in nutrition of immature Miscanthus and temporal dynamics of plant‐associated nitrogen fixers. The contribution of biological nitrogen fixation to plant nitrogen acquisition in first year Miscanthus × giganteus was estimated using a yield‐dependent 15 N isotope dilution model. Temporal changes in plant‐associated diazotroph relative abundance and community composition were analyzed with quantitative PCR and terminal restriction fragment length polymorphism of the nifH gene in rhizome and rhizosphere DNA extracts. We estimate 16% of new plant nitrogen was derived by nitrogen fixation during the growing season, despite non‐limiting soil nitrogen. Diazotroph communities from rhizome and rhizosphere changed with plant development and endophytic nitrogen fixers had significantly higher relative abundance and altered community composition at sampling dates in July and August. This study provides evidence for a small, but measurable, benefit of associative nitrogen fixation to first year Miscanthus × giganteus that underscores the potential and need for selection of breeding lines that maximize this trait.
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“Inputs of N fertilizer account for a significant amount of the fossil fuel consumption in agricultural systems (Keymer & Kent,2014; Vitousek etal.,1997), so there are benefits for reduced energy consumption and GHG emissions associated with reduced N inputs to crops.”
From Decadal change in soil carbon and nitrogen with a Miscanthus × giganteus crop on abandoned agricultural land in southeast Ohio (2024) · cites this paper as Keymer & Kent,2014
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“The role that biological N fixation plays in the nutrition of young miscanthus is still debated, but Keymer and Kent(2014) estimated that N fixation contributes about 16% of the new N acquired by growing miscanthus plants.”
From Decadal change in soil carbon and nitrogen with a Miscanthus × giganteus crop on abandoned agricultural land in southeast Ohio (2024) · cites this paper as Keymer and Kent, 2014
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Cited by
Sorted by citations
Environmental costs and benefits of growing Miscanthus for bioenergy in the UK
McCalmont, J. P., Hastings, A., McNamara, N. P., Richter, G. M., Robson, P., Donnison, I. S., & Clifton‐Brown, J. (2017) · GCB Bioenergy · doi:10.1111/gcbb.12294 · Cited by 244
Adu Fosu, S., & Davis, S. C. (2024) · GCB Bioenergy · doi:10.1111/gcbb.13171 · Cited by 4
Grover, S., Anderson, H. M., Fleck, J., Kelly, C. N., Schuler, J., Ruark, M. D., & Freedman, Z. B. (2024) · Soil Science Society of America Journal · doi:10.1002/saj2.20647 · Cited by 3
Metadata
- Authors
- Keymer, D. P., & Kent, A. D.
- Affiliations
- University of Illinois Urbana-Champaign (US)
- Corresponding author
- Kent, Angela D.
- ORCID
- Kent, Angela D.
- Venue
- GCB Bioenergy
- Publisher
- Wiley
- Published
- 2013-07-31
- Volume
- 6
- Issue
- 5
- Pages
- 577-586
- ISSN
- 1757-1693 (ISSN-L)
- 1757-1707
- OpenAlex
- W2161359064
- Cited by
- 67
- References
- 0
- Citations by year
- 2025: 5 · 2024: 11 · 2023: 8 · 2022: 9 · 2021: 6 · 2020: 9 · 2019: 5 · 2018: 4 · 2017: 2 · 2016: 1 · 2015: 4 · 2014: 3
- FWCI
- 5.67
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- GCB Bioenergy (publishedVersion)
- Funders
- Energy Biosciences Institute
- University of Illinois at Urbana-Champaign
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant-Microbe Interactions and Immunity
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Legume Nitrogen Fixing Symbiosis
- Keywords
- Miscanthus × giganteus, nitrogen fixation, associative nitrogen fixation, nitrogen-fixing bacteria, nifH gene, rhizosphere, rhizome, plant nitrogen acquisition, 15N isotope dilution, biomass feedstock, nitrogen fertilizer reduction, plant development
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