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Le faux semis : identifier les clés du succès

Abstract : Stale seedbeds (or false seedbeds) aim to trigger weed seed germination during summer fallow in order to reduce the weed seed bank. This tillage operation must be shallow (less than 5 cm) and create a firm seedbed without clods. Field trials did not show any correlation between weed emergence during summer fallow and weed emergence in the following crop. Weed emergence observations underestimate the efficacy of stale seedbeds because they disregard seeds that germinate without emerging. Stale seedbed efficacy depends on soil moisture and seed dormancy level at the time of the operation. This technique must be combined with other techniques such as delaying the sowing of the following crop. This strategy was successful in simulations with the FLORSYS weed dynamics model. In an oilseed rape-winter wheatwinter barley rotation, stale seedbed the most reduced the weed infestation in the following crops if it was carried out in mid-August. Later operations risk to increase weed emergence after the sowing of the earliest winter crops.
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Contributor : Noureddine El Mjiyad <>
Submitted on : Wednesday, March 3, 2021 - 10:11:57 AM
Last modification on : Wednesday, June 2, 2021 - 3:38:59 AM


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Jérome Labreuche, Pascale Métais, Fanny Vuillemin, Ludovic Bonin, Nathalie Colbach. Le faux semis : identifier les clés du succès. Innovations Agronomiques, INRAE, 2020, 81, pp.51-67. ⟨10.15454/e8zr-w568⟩. ⟨hal-03157364⟩



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