Model evaluation of cover crops, application to eleven species for banana cropping systems

Tixier Philippe, Lavigne Christian, Alvarez Stéphanie, Gauquier Antoine, Blanchard Morgane, Ripoche Aude, Achard Raphaël. 2011. Model evaluation of cover crops, application to eleven species for banana cropping systems. European Journal of Agronomy, 34 (1) : 53-61.

Quartile : Q1, Sujet : AGRONOMY

Résumé : Cover crops are increasingly used for weed management. But selecting the most suitable species of cover crop to be associated with a main crop requires long-term trials. We present a model-based method that uses a reduced number of parameters to help select cover crops in the context of banana cover-cropping systems. We developed the SIMBA-CC model to focus on radiation interception. The model was calibrated for 11 cover crop species by measuring their growth in 4m2 plots with three levels of shade (0, 50, and 75%). The SIMBA-CC model served to predict the long term growth potential of the 11 cover crop species in function of the radiation under the banana crop canopy. The model was validated using three species in association with banana plants. We defined three indicators based on outputs of the model to assess the ability of each of the 11 species (i) to compete with weeds and (ii) to be maintained in the long-term under the canopy of the main crop, and (iii) to evaluate competition with the main crop for nitrogen resource. This ex ante evaluation revealed the most promising species to be intercropped with banana. Finally, the SIMBA-CC model was used to define the light interception traits of a virtual cover crop that satisfy the three indicators in the case of intercropping with banana. We showed that to satisfy the three criteria, cover crops with low values of optimal photosynthetically active radiation (PARopti) should have moderate maximal biomass productivity, while crops with higher PARopti values should have a higher maximal productivity. The use of functional traits and modeling appears effective to disentangle the relations between intrinsic traits of cover crops and effect traits that affect the performances of the intercropping system.

Mots-clés Agrovoc : modèle de simulation, modélisation des cultures, compétition végétale, rendement des cultures, mauvaise herbe, désherbage, Musa, éclairage, Fabaceae, Convolvulaceae, Poaceae, culture sous couvert végétal, plante de couverture

Mots-clés géographiques Agrovoc : Martinique, France

Classification Agris : F08 - Systèmes et modes de culture
U10 - Informatique, mathématiques et statistiques
H60 - Mauvaises herbes et désherbage

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Tixier Philippe, CIRAD-PERSYST-UPR Systèmes bananes et ananas (MTQ) ORCID: 0000-0001-5147-9777
• Lavigne Christian, CIRAD-PERSYST-UPR HortSys (MTQ)
• Alvarez Stéphanie, CIRAD-PERSYST-UMR ERRC (REU)
• Gauquier Antoine
• Blanchard Morgane
• Ripoche Aude, CIRAD-PERSYST-UPR Systèmes bananes et ananas (MTQ) ORCID: 0000-0001-6756-9777
• Achard Raphaël, CIRAD-PERSYST-UPR Systèmes bananes et ananas (MTQ)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/558023/)

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