Decomposition of fine roots and α-cellulose in a short rotation willow (Salix spp.) plantation on abandoned agricultural land
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Decomposition of fine roots (<1 mm in diameter) of the clones of Salix viminalis, S. dasyclados and α-cellulose sheets (50 x 10 x 1 mm) was studied in a 6-years old Salix spp. plantation established on abandoned agricultural land in Estonia. The substrates were incubated in litterbags (mesh size 0.14 mm) in 5â10 cm topsoil, in non-fertilised plots for one year. Changes in the ash-free weight of the fine roots were best described by negative exponential models (S. viminalis R =â0.98, S. dasyclados R =â0.96), and by a linear model for α-cellulose (R =â0.63). The sheets of α-cellulose decomposed roughly twice as rapidly as the fine roots (S. viminalis kâ=â0.325, S. dasyclados kâ=â0.165). The remaining (of the initial) ash-free weights of the fine roots were 73.3â±â0.8% (meanâ±âSE) and 85.8â±â2.2% respectively, and of the α-cellulose 35.9â±â8.5%, in the end of the one year of decomposition. The amount of acid detergent (AD) lignin in the fine-roots of S. viminalis increased significantly and did not change in S. dasyclados, suggesting higher activity of microbial decomposers in the first substrate. Of the studied quality parameters, the AD lignin was the major factor determining the different rate of decomposition of the fine roots of S. viminalis and S. dasyclados. Nitrogen was recycled in the fine root sub-system in both Salix species. This knowledge can be applied in the management of Salix plantations, aimed at bioenergy production.222
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Turnover times for willow roots determined from a mass loss (15-25%) in litter bags were much longer than those determined using other methods.
“Turnover times for willow roots [127] determined from a mass loss (15–25 %) in litter bags were much longer than those determined using other methods (Table 2).”
From Carbon Sequestration by Perennial Energy Crops: Is the Jury Still Out? (2015) · cites this paper as [127]
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Carbon Sequestration by Perennial Energy Crops: Is the Jury Still Out?
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- Authors
- Püttsepp, Ü., Lõhmus, K., & Koppel, A.
- Affiliations
- Swedish University of Agricultural Sciences (SE)
- Estonian University of Life Sciences (EE)
- Venue
- Silva Fennica
- Publisher
- Finnish Society of Forest Science
- Published
- 2007
- Volume
- 41
- Issue
- 2
- ISSN
- 0037-5330 (ISSN-L)
- 2242-4075
- OpenAlex
- W2017849705
- Cited by
- 16
- References
- 43
- Citations by year
- 2023: 1 · 2021: 1 · 2020: 2 · 2018: 1 · 2016: 1 · 2015: 1 · 2014: 2 · 2012: 3
- FWCI
- 1.63
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Silva Fennica (publishedVersion, cc-by-sa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Eesti Teadusfondi
- Sveriges Lantbruksuniversitet
- Tartu Ülikool
- 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
- Physical Sciences › Environmental Science › Ecology › Environmental and biological studies
- Keywords
- fine root decomposition, Salix viminalis, Salix dasyclados, short rotation willow, abandoned farmland, litterbags, acid detergent lignin, nitrogen recycling, bioenergy
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