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Objectif Végétal : une dynamique partenariale

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    Research resultats

    Research resultats

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    • Improve your horticultural growing media
    • Reduce the irrigation of your horticultural growing media
    • Manage your nitrogen fertilisation in soil-less conditions
    • Microorganisms, a fertility factor in soil-less cultivation


    • Optimize the climate around yours plants
    • Optimize the energie efficiency of your greenhouses
    • Conciliate energy saving and yield optimisation
    • Contril your climatic parameters to manage pathogens


    Aboveground and / or under-shelter production systems are growing rapidly, and must meet major challenges, both in terms of perfomance and in thems of reducing inputs and protecting natural resources.

    Nitrogen fertilization, reduction in the use of peat root development, management of irrigation and the climatic environment of plant, energy saving ... are therefore all research topics of interest to professionals (market garners, producers of ornamental plants, greenhouse and substate producers).


    is recognized for its academic skills in the field of (bio-) physical transfers in the plant environment in highly anthropised or artificialized constrained environment. The EPHorresearch unit is working to better understand and understand off-ground and/or under-ground production systems. Researchers are studying the interactions between organic culture media and roots as well as the consequences on the bioavailability of water, air and nutrients during culture.They are also interested in the transfer of water and energy in the substrate-atmosphere continuum under irrigationrestriction conditions. Their work sometimes uses the skills of the Arch-E team of IRHS the research unit, that is specialist in plant eco-physiology.


    These skills enable researchers to propose ways to meet the societal demand for the performance of these production systems while reducing the environmental impact:

    • Improve the phyical properties of substrates
    • Favor organic fertilization despite its constraints
    • Better control greenhouse climate by modeling
    • Better manage water resorces
    • Valorise alternative materials


    Improve your horticultural growing media

    Reduce the irrigation of your horticultural growing media


    Ecol'EAU Terreau project


    Ecol'EAU Terreau project (2013-2017) – funds from Angers Loire Métropole and professional consortium.

    This project was performed by EPHor research unit in partnership with 11 culture media manufactures, to evaluate the effect of root development and irrigation regime on transfer properties and on bioavailability in water and air in organic substrates.



    • Resultats: This project has demonstrated the aerating properties of the substrate and its wettability as key physical parameters favoring root development. In extenso, this project contributes to optimise
    • the association of substrates on the basis of these new criteria,
    • the management of irrigation.



    OPTIFRAISE project


    OPTIFRAISE project (2015-2018) - funds from FEDER , Région Nelle Aquitaine, Fraises de France and private companies.


    The project is driven by Ivennio with a consortium of partners (Chambre d'agriculture 47, ValPrim, INRA Bordeau, EPHor research unit and private conpanies). It aims to optimise irrigation management in soilless straberries cultivation.


    • Results: This project highlights the effectiveness of irrigation management using tensiometers and water content probes, allowing significant reduction in water intake (around 20%) compared to the usual practices of producers.



    REWET project


    REWET project (2018-2019) - private funds


    This project is performed by EPHor research unit, in partnership with private companies.



    • Objective: Optimise the composition of the substrate by analysing the influence of the incorporation of coconut fibers and wetting agents on the ability to re-wet peat substrates according to irrigation techniques.


    Jean Charles Michel

    Jean Charles Michel

    jean-charles.michel @ agrocampus-ouest.fr







    Mange your nitrogen fertilisation in soil-less conditions



     OPTiFaz Project


    OPTiFaz Project (2017-2020) - funds from CASDAR and VAL'HOR


    Driven by ASTREDHOR, this project aims to optimize organic nitrogen fertization in horticultural growing media, by developing a predictive tool based on the modeling of organic nitrogen mineralization under ground conditions.



    • Objective: field management tools to support the management of organic fertilization and determine nitrogen requirements in the crop cycle.


    René GuenonRené Guenon

    rene.guenon@agrocampus-ouest.fr (patrice.cannavo @ agrocampus-ouest.fr)



    Microorganisms, a fertility factor in soil-less cultivation



    Microorganisms, fertility


    Louise Paillat has been recruited by Premier Tech for a Cifre thesis (2018-2021), and is co-supervised by EPHor and IRHS (Arch-E team) research unit. She studies the role of the rhizosphere microorganisms in complex "organic fertilizer-substrate" medium on the nutrients bioavailability and on plant growth.


    • Objective: improve the fertility of substrates by controlling microorganisms of the rhizosphere


    Patrice Cannavo

    Patrice Cannavo

    patrice.cannavo @ agrocampus-ouest.fr

    Optimize the climate around yours plants

    Optimize the energy efficiency of your greenhouses






    Hortinergy project (2017-2018) - ADEME funds

    EPHor, Agrithermic, CTIFL (Balandran et Carquefou) et ASTREDHOR (RATHO).



    • Results: A simulation sofware for the energy balance and GHG emissions of greehouse has been developed by integrating the contribution of plants.




    Conciliate energy savings and yield optimisation



    Conser project


    Conser project (2014-2017) - funds from Région Pays de la Loire / FranceAgriMer / ARELPAl

    CTIFL (Carquefou), CDDM, EPHor, HortiMaXFrance, Cheminant


    The aim is to test and validate innovative crop management methods for greenhouse-grown cucumber, that have been determined according to the plant physiology. For this, the project conciliates energy savings and optimization of yield while reducing the impact of Didymella Bryoniae (a pathogenic fungus).


    • Results: Recommendations on how to optimally control the climate in production greenhouses, improve the efficiency of cucumber crops (for example: partial relocation of the heating systems and the ventilation fan for the entire canopy).




    Control your climatic parameters to manage pathogens




     Project PHYSI'HO


    Project PHYSI'HO (2012-2017) - funds from Région Pays de la Loire + private companies.


    This innovative collaborative project involving EPHor, IRHS, BHR, BIOGER research unit of INRA-Grignon and the hydrangea producers of Maine et Loire (Chauvin hortensia, Hortensia France Productions, Sicamus Productions) studied the climatic and physiological factors influencing the conservation of hydrangea plants when stored in a cold room.





    Pierre-Emmanuel Bournet



    Pierre-Emmanuel Bournet








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    Looking for partners?

    Two contacts to support your projects:

    • Emeline Defossez,

    contact to support your R&D projects and put you in touch






    • Tanegmart Redjala

    Close interface with the laboratoires of the Federative Research Structure "Quasav"