Agroecological engineering

Agroecological engineering

BACCHUS papillonEvaluate and redesign multifunctional wine-growing systems that limit the use of inputs in partnership with winegrowers

Objectives: On the basis of the knowledge produced in research and the evaluation of the multiple performances (environmental, agronomic and economic) of wine-growing systems, the aim here is to implement a redesign approach to cropping systems in direct partnership with winegrowers in order to improve the performance of their systems.

In particular, we are looking for:

  •     Mobilizing the agro-ecological knowledge produced in the 3 research axes
  •     Co-designing the systems with winegrowers in real production situations on the basis of performance evaluation
  •     Analysing the trajectories of systems evolution over the long term

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Multi-criteria evaluation of the agronomic, ecological and economic performance of wine-growing systems

The evaluation of systems is mainly based on quantitative measures of system performance on different dimensions and in particular on dimensions:

    Agronomic: vigour, yield, population levels of crop pests, soil quality

    Ecological: intra-parcel plant diversity, levels of natural regulation, degradation of organic matter, conservation of pollinators, plants, predatory arthropods, and birdlife

    Economic: cost of practices, product valuation

These quantitative performance measures are supplemented by indicators calibrated and calculated on the basis of wine-growing practices (e.g., I-Phy viticulture).

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Co-design of innovative wine-growing systems

The redesign approach allows winegrowers to be supported in improving the performance of their systems on the basis of an initial assessment while taking into account the technical and organisational obstacles linked to the operation of the farm. After analysing the issues related to the reduction in the use of plant protection products and the constraints associated with the various systems, this iterative approach based on an annual time step is divided into 4 steps:

  •     Sharing and concerted development of potential solutions through de novo approaches conducted in a co-design workshop
  •     The integration and implementation of the solutions proposed in the pre-existing systems for winegrowers under real production conditions
  •     The evaluation of the agronomic, ecological and economic performance of these systems
  •     A feedback on the systems proposed to redesign them on the basis of the evaluated performances

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Levers mobilized in the co-design approach with stakeholders

The redesign of the systems combines different levers and takes particular account of soil management and pest control practices. It integrates for example:

  •     Risk mitigation through appropriate soil management and maximizing the potential for natural regulation,
  •     Actions on inoculum in the soil and vines: pre-flowering ploughing, management of grass cover under the row, green operations
  •     Specific actions adapted to the different types of pests and diseases present in the plot
  •     Taking into account the landscape context on the natural regulation service of pests and diseases
  •     Catch-up solutions using biocontrol products, dose optimization and alternating control product families

However, not all the systems studied implement the same combinations of levers since they are dependent on the initial assessment of the systems and the existing room for manoeuvre at the local level. The cost of the practices also integrates the global reflection in each culture system studied.

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