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Field assessment of organic amendments and spring barley to phytomanage a Cu/PAH-contaminated soil

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Abstract

The INTENSE project, supported by the EU Era-Net Facce Surplus, aimed at increasing crop production on marginal land, including those with contaminated soils. A field trial was set up at a former wood preservation site to phytomanage a Cu/PAH-contaminated sandy soil. The novelty was to assess the influence of five organic amendments differing in their composition and production process, i.e. solid fractions before and after biodigestion of pig manure, compost and compost pellets (produced from spent mushroom substrate, biogas digestate and straw), and greenwaste compost, on Cu availability, soil properties, nutrient supply, and plant growth. Organic amendments were incorporated into the soil at 2.3% and 5% soil w/w. Total soil Cu varied from 179 to 1520 mg kg−1, and 1 M NH4NO3-extractable soil Cu ranged from 4.7 to 104 mg kg−1 across the 25 plots. Spring barley (Hordeum vulgare cv. Ella) was cultivated in plots. Changes in physico-chemical soil properties, shoot DW yield, shoot ionome, and shoot Cu uptake depending on extractable soil Cu and the soil treatments are reported. Shoot Cu concentration varied from 45 ± 24 to 140 ± 193 mg kg DW−1 and generally increased with extractable soil Cu. Shoot DW yield, shoot Cu concentration, and shoot Cu uptake of barley plants did not significantly differ across the soil treatments in year 1. Based on soil and plant parameters, the effects of the compost and pig manure treatments were globally discriminated from those of the untreated, greenwaste compost and digested pig manure treatments. Compost and its pellets at the 5% addition rate promoted soil functions related to primary production, water purification, and soil fertility, and the soil quality index.

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Abbreviations

DOC:

Dissolved organic carbon

DOM:

Dissolved organic matter

PAH:

Polycyclic aromatic hydrocarbons

EU:

European Union

SOM:

Soil organic matter

Unt:

Untreated soil

C2:

2.3% w/w of compost

C5:

5% w/w of compost

G2:

2.3% w/w of green waste compost

PM2:

2.3% w/w of pig manure

PD2:

2.3% w/w of digested pig manure

P2:

2.3% w/w of compost pellets

P5:

5% w/w of compost pellets

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Acknowledgements

The INTENSE project was funded by the ERA-NET FACCE SURPLUS Cofund (http://faccesurplus.org/about-facce-surplus/), formed by the European Commission and a partnership of 15 countries in the frame of the Joint Programming Initiative on Agriculture, Food Security and Climate Change (FACCE-JPI), Europe Union’s Horizon 2020 Research and Innovative programme under grant agreement No 652615. This work was continued under the BioFoodonMars project (https://projects.au.dk/faccesurplus/research-projects-3rd-call/biofoodonmars/). The UMR BIOGECO is member of the INRAE ecotoxicology network (ECOTOX, https://www6.inrae.fr/ecotox_eng/) and the COST Action 19116 PlantMetals (https://plantmetals.eu/plantmetals-home.html).

Funding

The INTENSE project was funded by the ERA-NET FACCE SURPLUS Cofund (http://faccesurplus.org/about-facce-surplus/), formed by the European Commission and a partnership of 15 countries in the frame of the Joint Programming Initiative on Agriculture, Food Security and Climate Change (FACCE-JPI), Europe Union’s Horizon 2020 Research and Innovative programme under grant agreement No 652615. The BioFoodonMars project (https://projects.au.dk/faccesurplus/research-projects-3rd-call/biofoodonmars/, https://biofoodonmars.com/) under the ERA-NET FACCE SURPLUS Cofund 3rd call (https://projects.au.dk/faccesurplus/research-projects-3rd-call/) is allowing to maintain this field trial.

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Contributions

MM, SM, NO contributed to set-up and management of the field trial, collection and analysis of soil and plant samples. NO, SM, AB contributed to statistical analysis. MM, WS, BR, TP, AS contributed to production and analysis of organic amendments. AB, SM contributed to computation of ecosystem services and soil quality index. MM, SM, NO contributed to drafting of the manuscript, data interpretation. WS, BR, TP, AS contributed to the manuscript writing.

Corresponding author

Correspondence to Michel Mench.

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Mench, M., Matin, S., Szulc, W. et al. Field assessment of organic amendments and spring barley to phytomanage a Cu/PAH-contaminated soil. Environ Geochem Health 45, 19–39 (2023). https://doi.org/10.1007/s10653-022-01269-x

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