L’association de plantes compagnes aux protéagineux grains pour sécuriser leur production en agriculture conventionnelle et biologique

Abstract : Pulses are facing several technical issues (weed management, yield irregularity,…), resulting in difficulties for their production. Trials were set up in the Western part of France to solve these problems, using an intercrop with a cereal. The pulse is sowed at the same density as a sole crop and the cereal at low density, to benefit from its presence but without important competition. The experiments were conducted on winter and spring faba bean, pea and lupin, both in conventional and organic farming. The main goal was to improve protein autonomy of breeding farms in the west part of France. Regarding weed management, cereals have a better soil cover and are more competitive against weeds. Therefore, the intercrop has a lower weed biomass than the pulse alone at flowering stage. Regarding yield, results on intercropped pulse yield are variable (increase or decrease). In the case of peas, the cereal can be a vertical support for the pea, thus allowing a better pea yield. The total yield (pulse + cereal) is always higher in the intercrop than for the sole pulse. Regarding economic data, the semi-net margin is strongly linked with the pulse grain yield. The complementary cereal production may or may not compensate the over-costs generated by the intercrop (extra seeds, separation, lack of CAP aids for intercrop plots), depending on the situations. Plots were also observed to analyse farmer practices for those crops. Technical management is very variable and that variability reflects the vast range of objectives and motivations of farmers to grow pulses.
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Journal articles
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Submitted on : Tuesday, November 5, 2019 - 8:11:30 PM
Last modification on : Tuesday, November 5, 2019 - 8:11:30 PM

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Céline Bourlet, C. Cocoual, S. Lehérissey, A. Vandewalle. L’association de plantes compagnes aux protéagineux grains pour sécuriser leur production en agriculture conventionnelle et biologique. Innovations Agronomiques, INRA, 2019, 74, pp.155-166. ⟨10.15454/c3oi9k⟩. ⟨hal-02349954⟩

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