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La compétition pour les ressources entre plantes : des clés pour choisir les cultures et variétés pour contrôler les adventices

Abstract : Competition occurs when plants share a common resource pool (light, water, minerals) whose quantity is too low to support the requirements of all plants. Competition is a key process explaining weed harmfulness for crop production. A weed management option could be to drive competition in favour of crops to promote biological (rather than chemical) weed biological regulation. In this perspective, this article synthesizes recent advances gained from the CoSAC project on (1) the light competition strategies existing among a large panel of crop and weed species and (2) the biological characteristics involved in nitrogen competition, and their associated inter-species variability. This article shows how integrating this knowledge into a mechanistic simulation model provides a unique tool to identify key crop characteristics explaining their competitive ability with weeds. These results are discussed in terms of plant characteristics that farmers could sow in their fields and that crop breeders could target to promote biological weed regulation.
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https://hal.inrae.fr/hal-03151794
Contributor : Noureddine El Mjiyad <>
Submitted on : Thursday, February 25, 2021 - 9:02:04 AM
Last modification on : Wednesday, June 2, 2021 - 3:38:59 AM

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Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

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Delphine Moreau, Laurène Perthame, Nathalie Colbach. La compétition pour les ressources entre plantes : des clés pour choisir les cultures et variétés pour contrôler les adventices. Innovations Agronomiques, INRAE, 2020, 81, pp.19-32. ⟨10.15454/qrwv-7344⟩. ⟨hal-03151794⟩

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