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A model-based assessment of the soil C storage potential at the national scale: A case study from France

Sylvain Pellerin 1 Laure Bamière 2 Julie Constantin 3 Camille Launay 4 Raphaël Martin 4 Michele Schiavo 5 Denis Angers 6 Laurent Augusto 1 Jérôme Balesdent 7 Isabelle Basile Doelsch 7 Valentin Bellassen 8 Rémi Cardinael 9 Lauric Cécillon 10 Claire Chenu 11, 12 Joël Daroussin Philippe Delacote 13 Nathalie Delame 2 Francois Gastal 14 Anne-Isabelle Graux 15 Bertrand Guenet 16 Sabine Houot 11, 12 Katja Klumpp 4 Elodie Letort 17 Manuel Martin 18 Bruno Mary 19 Safya Menasseri-Aubry 20 Delphine Meziere 21 Claire Mosnier 22 Thierry Morvan 23 Jean Roger-Estrade 24 Laurent Saint-André 25 Olivier Therond 26 Valérie Viaud 23 Olivier Rechauchère 5 Guy Richard 27
Abstract : The recent controversy about the 4 per 1000 initiative has emphasized the need for a quantitative assessment of the C storage potential of agricultural soils. Moreover a clear distinction is required between the biophysically and the economically achievable potentials. Here we used a modelling approach at a fine spatial-scale resolution (< 8 km2) to quantify the additional C storage in agricultural soils of mainland France following the implementation, when feasible, of a range of soil C storing practices (i.e. cover crops, reduced tillage, new C inputs, grazing instead of mowing,…). The additional cost for farmers was also calculated, thus yielding the cost per Mg of additional C stored in soils. Results showed that the average additional C storage calculated over 30 years ranged between +0.028 and + 0.466 Mg C ha-1 yr-1 (i.e. between +0.5 and +7.2‰) for the different tested practices, with a very high spatial variability over France for each practice related to initial C stocks and pedo-climatic conditions. The storing practices where then ranked according to the cost of the additional C stored in soils (expressed in euro per Mg of C) and an optimal cost-efficient strategy was proposed at the national level.
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Submitted on : Tuesday, June 2, 2020 - 8:04:03 PM
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SPellerin Poitiers 19 June 201...
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  • HAL Id : hal-02737947, version 1
  • PRODINRA : 475123


Sylvain Pellerin, Laure Bamière, Julie Constantin, Camille Launay, Raphaël Martin, et al.. A model-based assessment of the soil C storage potential at the national scale: A case study from France. Food security and climate change: 4 per 1000 initiative new tangible global challenges for the soil, Jun 2019, Poitiers, France. ⟨hal-02737947⟩



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