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Comparaison de l’impact de deux méthodes de rénovation d’une prairie du domaine expérimental INRAE du Pin-au-Haras sur la productivité et l’évolution des stocks de Carbone du sol : le resemis et le sursemis

Abstract : The aim of this study was to evaluate the short-term effects of two grassland restoration methods on biomass yield and carbon storage in the upper soil layer. We used a grassland located on the INRAE Pin-au-Haras experimental farm (Normandy), which had been seeded 12 years ago. It was divided up into three subplots: (i) a control subplot; (ii) a subplot restored via reseeding; and (iii) a subplot restored via overseeding. Biomass yield, carbon levels in the top 10 cm of the soil, and the properties of the soil organic matter were examined 8 months and 20 months after the treatments were applied. The reseeding and overseeding methods increased annual biomass yield by 50%; the levels of organic carbon in the soil were maintained, and the amount of soil organic matter increased. Neither restoration method changed the C/N ratio or the proportion of soluble carbon in the soil. Our findings indicate that the overseeding method and the reseeding method similarly increased grassland productivity. However, the former does not require the use of glyphosate, allowing levels of carbon storage in the soil to remain stable.
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https://hal.inrae.fr/hal-03279435
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Submitted on : Tuesday, July 6, 2021 - 2:53:27 PM
Last modification on : Wednesday, July 7, 2021 - 3:43:16 AM

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Caroline Kohler, Annette Morvan-Bertrand, Servane Lemauviel-Lavenant, Yves Gallard, Jean-Bernard Cliquet. Comparaison de l’impact de deux méthodes de rénovation d’une prairie du domaine expérimental INRAE du Pin-au-Haras sur la productivité et l’évolution des stocks de Carbone du sol : le resemis et le sursemis. Fourrages, Association Française pour la Production Fourragère, 2020, pp.31-37. ⟨hal-03279435⟩

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