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Genre/Form: | Thèses et écrits académiques |
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Material Type: | Document, Thesis/dissertation, Internet resource |
Document Type: | Internet Resource, Computer File |
All Authors / Contributors: |
Elana Dayoub; Guénaëlle Corre-Hellou; Anis Limami; Nathalie Colbach; Gérard Duc; Anne-Sophie Voisin; Steven J Shirtliffe; Université d'Angers.; École doctorale Végétal-Environnement-Nutrition-Agro-Alimentaire-Mer (Angers).; Laboratoire d'Ecophysiologie Végétale et Agroécologie du groupe ESA (Angers). |
OCLC Number: | 1028549609 |
Notes: | Titre provenant de l'écran-titre. |
Description: | 1 online resource |
Responsibility: | Elana Dayoub ; sous la direction de Guénaëlle Corre-Hellou. |
Abstract:
Enhancing crop competitiveness against weeds is a relevant way in order to design cropping system less dependent on herbicides. Legumes are key species in diversified cropping systems but they are known to be low competitive against weeds. However, inter-specific variability especially in the early growth had been little studied. Our work aims to i) study, via two greenhouse experiments in rhizotrons, the traits involved in the growth and nitrogen (N) acquisition for a range of legume species and the impacts on weed-legume competition at the beginning of crop cycle and to ii) quantify under field experiments the interest of legume-non legume intercropping (oilseed rapelegumes, maize-perennial legumes, where legume species were grown as service plant) on weed growth and weed species composition. Our results highlighted the inter-specific variability for soil N uptake in the early growth in relation with seed reserves and rooting exploration. Weed growth and N acquisition are influenced differently as a function of legume species in the early growth. Field experiments show the advantage of species combinations with complementary traits for using resources, leading to better weed control while maintaining crop productivity. This study shows also that weed species composition was modified as a function of legume species in relation with both legume traits and weed traits response.
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