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Poster De Conférence Année : 2018

Diversified Agrosystem and Long Term Evolution: Should we Have to Open the Soil Black Box in Conception ?

Résumé

Crop diversification is necessary for agroecological transition. Crop diversification can be managed at various time and spatial scales. As a consequence to crop diversification, some ecosystem components will be impacted, and in particular soil functioning. The objective of this study is to estimate the impact of intercropping on soil quality and related consequences to ecosystem services. To foresee the long term consequences, we have conceptualized the long term relationships between soils sub systems and plants. STICS model has been chosen to simulate a succession of intercrops in comparison with the rotation of same crops during (i) 10 years for one soil type and (ii) 6 years for 42 soil types for a same oceanic climate located in Brittany (France). Intercrops are pea and barley followed by a mustard during winter, same crops are also simulated in rotation. Intercropping maintains the stock of soil organic matter compared to crop rotation (-3%) but increased denitrification. When considering nitrate lixiviation, the environmental performance of crop rotation is lower compared to intercrops. Such results pointed out the balance of ecosystem services/ disservices between pedoclimatic situations. Among pedoclimatic situations, we have identified some very contrasted results providing evidences of a local adaptation of crop systems by modelling. These results can be used to guide further development of crop models for designing agricultural systems
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Dates et versions

hal-02738347 , version 1 (02-06-2020)

Identifiants

  • HAL Id : hal-02738347 , version 1
  • PRODINRA : 450234

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Edith Le Cadre-Barthélémy, Camille Launay, Isabelle Bertrand, Aurelie Metay, Jacques Wéry. Diversified Agrosystem and Long Term Evolution: Should we Have to Open the Soil Black Box in Conception ?. 15. European Society for Agronomy Congress (ESA), Aug 2018, Genève, Switzerland. 180 p., 2018, ESA 2018 : XVe European Society for Agronomy Congress. Abstract Book. Innovative cropping and farming systems for high quality food production systems. ⟨hal-02738347⟩
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