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Dernière mise à jour : Mai 2018

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SOFIA

Viabilité et adaptation des écosystèmes productifs, territoires et ressources face aux changements globaux (Agrobiosphere)
Edition 2011

SOil Functional diversity as an Indicator of sustainable management of Agroecosystems

Agroecosystems, agricultural practices and functional biodiversity of soil
The SOFIA project stands in the context of environmental issues of cropped ecosystems. It examines the impact of agricultural practices on the taxonomic and functional diversity of the soil living communities, and the effects on the functions performed by these soils

Studying the effect of agricultural practices on functional diversity of soil
SOFIA project addresses the impact of agricultural practices on the taxonomic and functional diversity of the soil living communities , and the effects on the functions performed by these soils ( greenhouse gas emissions, carbon storage, nutrient availability , biodiversity). The treatments used modulate the amount , chemical nature, the location of food resources for soil organisms. The project is to follow the differentiation of systems under the influence of these practices and to address specific factors, like chemical quality of the crop residues. The data produced will be used to test and improve biotic and abiotic indicators of soil functioning, to better guide farmers and advisors in the context of transitions created by changes in farming practices. This project will also contribute to the improvement of indicators needed to assess the environmental impact of farming practices

A multidisciplinary approach to understanding the functioning of soil
The project builds on an experimental site of the Observatory in Environment (SOERE ) « Agroecosystems , Biogeochemical Cycles and Biodiversity « located at Estrées -Mons in the Somme department in France. This experiment provides a series of experimental treatments varying crop rotation , mineral inputs ( nitrogen fertilization ) and tillage. The project consists on the one hand to follow the course of a 4-year soil differentiation induced by these practices in terms of agricultural, physical and chemical variables for the soil. On the other hand , the project is striving to characterize the taxonomic and functional as well as the dynamics of earthworm communities, diversity of macro- invertebrates, micro fauna and bacterial and fungal communities. Finally some soil functions are quantified ( degradation , mineralization, CO2 and N2O emissions). The data produced are used to test and improve biotic and abiotic indicators.

Results

The measurements obtained during the first two years of the experiment (2012 and 2013) show an early differentiation of experimental treatments, including an increase in organic matter and microbial activity in treatments with shallow tillage. The treatment receiving 50% of the maximum nitrogen fertilization, underwent a 10% decrease in biomass production. A thesis on the relationship between quality of crop residues, and functional changes in soil communities began in 2012.

Outlook

The acquisition of knowledge is not linear in this project and field samplings of years 2013 and 2014 are crucial, as they represent +3 and +4 years after shift in agricultural practices.. It is therefore premature to consider the impact of this study. The thesis funded by the project is currently exploring some mechanistic hypotheses on the relationship between factors (residue quality) and soil functional diversity. Finally, a post-doctoral recruited in 2014 will be dedicated to the cross-sectional analysis of the results obtained during the kinetics of differenciation.

Scientific outputs and patents

The project has hosted yet several interns (BTS and Master level) and a PhD (in progress). Several posters were produced for the workshop of the French SOM network and of SOERE ACBB. Publication in English presenting SOFIA project has been written and published in a Tranfert-oriented article (International Innovation, September 2013)
(International Innovation, septembre 2013)
http://www.research-europe.com/index.php/digital_magazine/

Partners

Agro-Transfert-RT AGRO TRANSFERT RESSOURCES ET TERRITOIRES
CNRS Ecobio CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - DELEGATION REGIONALE BRETAGNE ET PAYS- DE-LA-LOIRE
INRA CMSE INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE DIJON
INRA AGRO-IMPACT INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE VERSAILLES GRIGNON
INRA Agronomie Grignon INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE VERSAILLES GRIGNON
INRA FARE INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE VERSAILLES GRIGNON
INRA PESSAC INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE VERSAILLES GRIGNON
ECODIV EA 1293 UNIVERSITE DE ROUEN [HAUTE-NORMANDIE]

ANR grant: 589 255 euros
Beginning and duration: janvier 2012 - 48 mois 

ANR Programme: Viabilité et adaptation des écosystèmes productifs, territoires et ressources face aux changements globaux (Agrobiosphere) 2011

Project ID: ANR-11-AGRO-0004

Project coordinator:
Sylvie RECOUS (INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE - CENTRE DE RECHERCHE DE VERSAILLES GRIGNON)
sylvie.recous@reims.inra.fr

Scientific Manager pour l’UMR Agroécologie : Perre-Alain MARON & Lionel  RANJARD

 

Project web site: https://www-admin.lille.inra.fr/lille_eng/nos_unites_et_recherches/nos_unites/umr_fare_reims/projets/projets_anr/sofia_anr_agrobiosphere