Stump and Root Biomass of Poplar Stands
Open accessAbstract
Today there is an increasing demand for biomass for use in energy production. In this study we investigated stumps and roots from six poplar (Populus sp.) stands growing on former farmland in Sweden, situated between latitudes 55 and 60°N. The mean age of the poplar was 20 years (range 16–23), the mean stand density 1151 stems ha−1 (range 361–3279), and the mean diameter at breast height (over bark) 288 mm (range 81–574). All poplar stands were on clay soils (light and medium clay and light clay tills).The mean dry mass weight of the 72 excavated stumps was 45 ± 39 kg (range 1–185), with the roots ≥ 50 mm weighing 14 ± 16 kg (range 0.2–87). Dry mean stump weight represented 21% (by dry weight) of the stem. The mean total dry weight per hectare for stumps amounted to 34.9 ± 21.8 (range 12.9–66.9) tons and the equivalent value for roots was 12.0 ± 9.6 (range 4.7–10.9) tons. The excavation of below-ground biomass can either focus on the stump or the stump and parts of the root system. Depending on the combination of soil type and soil moisture the weight of soil adhering to stumps and the cleaning requirements will vary.
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Results on plant belowground organ characterization of woody crops are in line with those reported for SRC-poplar and black locust plantations of the same age.
“Results on PBO characterization of woody crops are in line with those reported by Johansson and Hjelm (2012) and Quinkenstein et al. (2012) for SRC-poplar and black locust plantations of the same age.”
From Belowground biomass C outweighs soil organic C of perennial energy crops: Insights from a long‐term multispecies trial (2021) · cites this paper as Johansson and Hjelm (2012)
The Study Site section reports six poplar stands aged 16–23 years, and the Conclusions report measurements of their stumps and coarse roots. The paper therefore supports the poplar belowground-characterization part of the citation. It does not establish that these stands were short-rotation coppice or that they were the same age as the plantations in the citing study; the black locust citation is to a different source. (LLM, conf=0.82)
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- Authors
- Johansson, T., & Hjelm, B.
- Affiliations
- Swedish University of Agricultural Sciences (SE)
- Corresponding author
- Johansson, Tord
- Venue
- Forests
- Publisher
- MDPI AG
- Published
- 2012-04-18
- Volume
- 3
- Issue
- 2
- Pages
- 166-178
- ISSN
- 1999-4907 (ISSN-L)
- OpenAlex
- W2056942977
- Cited by
- 28
- References
- 20
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 3 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 1 · 2014: 2 · 2013: 1 · 2012: 2
- FWCI
- 2.53
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Forests (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- Energimyndigheten
- Topics
- Physical Sciences › Engineering › Mechanics of Materials › Forest Biomass Utilization and Management
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Forest ecology and management
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Keywords
- poplar, root biomass, belowground biomass, biomass energy, former farmland, stand density, soil type, clay soil, soil moisture, biomass harvesting
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