Miscanthus x giganteus culture on soils highly contaminated by metals: modelling leaf decomposition impact on metal mobility and bioavailability in the soil–plant system
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Miscanthus x giganteus is suggested as a good candidate for phytostabilization of metal-polluted soils. Its late harvest in winter generates large amounts of leaf litter on the soil surface. However, little is known about the mobility and the bioavailability of metals following leaf decomposition and the consequences on the succeeding culture. Ex situ artificial aging for 1, 3, and 6 months was conducted with miscanthus leaf fragments incorporated into three agricultural soils displaying a gradient concentration in Cd (0.6, 3.1 and 7.9 mg kg-1), Pb (32.0, 194.6 and 468.6 mg kg-1), and Zn (48.4, 276.3 and 490.2 mg kg-1) to simulate the leaf litter input over 20 years of miscanthus culture. We investigated the impacts on physicochemical and biological soil parameters, CaCl 2-extractable metal, and their subsequent ryegrass shoot concentrations, and hence on ryegrass health. The results showed that the amended soils possessed higher pH along with greater available phosphorous and soil organic carbon values. The respiratory activity and microbial biomass carbon in the amended soils increased mainly after 1 month of aging, and decreased afterwards. Despite the higher Pb- and Zn-CaCl 2 extractability in the amended soils, the phytoavailability slightly increased only in the most contaminated soils. Moreover, leaf incorporation did not affect the ryegrass biomass, photosynthetic pigment contents, nor the antioxidative enzyme activities. Conclusively, leaf incorporation induced slight variations in soil physicochemical and biological parameters, as well as metal extractability, but not to an extent that might cause a considerable threat to the subsequent culture. Nevertheless, these results are preliminary data that require confirmation by long-term in-situ experimentations as they reflect the modelization of long-term impact of leaf decomposition on soil-plant system.
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Long-term cultivation of miscanthus on agricultural soils fosters soil carbon, cation exchange and water retention capacities.
“In addition, long-term cultivation of this crop on agricultural soils fosters soil carbon, cation exchange and water retention capacities (Al Souki et al., 2020, 2017).”
From Potentials of Miscanthus x giganteus for phytostabilization of trace element-contaminated soils: Ex situ experiment (2021) · cites this paper as Al Souki et al., 2020
The soil results (p. 9) report increased organic carbon in two of three soils amended with miscanthus leaves. The study simulated 20 years of leaf input in a six-month laboratory experiment, rather than measuring long-term cultivation in the field. Our copy does not report that cultivation increased cation exchange capacity or water retention capacity; water-holding capacity appears only as a reference for maintaining experimental soil moisture (p. 5). (LLM, conf=0.87)
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References 55 · Cited by 26
Research works printed but not linked: 1
- Plants. Springer, Berlin, Heidelberg, 2013, pp. 121-147. 661
- Authors
- Al Souki, K. S., Liné, C., Louvel, B., Waterlot, C., Douay, F., & Pourrut, B.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- JUNIA (FR)
- Corresponding author
- Pourrut, Bertrand
- Venue
- Ecotoxicology and Environmental Safety
- Publisher
- Elsevier BV
- Published
- 2020-08
- Volume
- 199
- Pages
- 110654
- ISSN
- 0147-6513 (ISSN-L)
- OpenAlex
- W3021587418
- Cited by
- 26
- References
- 55
- Citations by year
- 2025: 8 · 2024: 4 · 2023: 4 · 2022: 1 · 2021: 6 · 2020: 3
- FWCI
- 0.86
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- other-oa
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (am, 283 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Ecotoxicology and Environmental Safety (acceptedVersion, other-oa)
- PubMed (publishedVersion)
- HAL (submittedVersion, cc-by-nc)
- LillOA (Université de Lille (University Of Lille)) (submittedVersion, other-oa)
- Funders
- ADEME
- Ministry of Education
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Keywords
- Miscanthus × giganteus, phytostabilization, metal-contaminated soil, leaf litter decomposition, metal mobility, metal bioavailability, cadmium, lead, zinc, ryegrass, soil microbial biomass, soil pH, soil organic carbon, antioxidant enzymes, photosynthetic pigments, soil-plant system
- MeSH terms
- Biodegradation, Environmental, Biological Availability, Poaceae, Lolium, Models, Theoretical, Soil, Soil Pollutants, Plant Leaves, Plant Roots, Biomass, Metals, Heavy
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