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Introducing Grasslands into Crop Rotations, a Way to Restore Microbiodiversity and Soil Functions

Abstract : The aims of this study were to investigate (i) the influence of aging grassland in the recovery of soil state by the comparison of permanent grassland, two restored grasslands, two temporary grasslands, and a continuous crop in the same pedoclimatic conditions, (ii) the extent and the persistence of the potential changes following a grassland/or cropland phase. We hypothesized that the level of microbial communities and enzyme activities could achieve a profile close to that of permanent grassland after the introduction of grassland for a few years in crop rotations. Soil biophysicochemical properties were studied. Our results indicated that the abundance of microbial communities and enzyme activities were positively correlated to soil C and N contents and negatively correlated to soil pH. The changes in microbial abundance level were strongly linked to the changes in functional level when grasslands are introduced into crop rotations. We also showed that a continuous crop regime had a stronger legacy on the soil biota and functions. By contrast, the legacy of a grassland regime changed quickly when the grassland regime is interrupted by recent culture events. A grassland regime enabled the restoration of functions after more than five cumulative years in the grassland regime.
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Submitted on : Friday, November 12, 2021 - 1:07:04 PM
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Wassila Riah-Anglet, Elodie Cusset, Rémi Chaussod, Stéven Criquet, Marie-Paule Norini, et al.. Introducing Grasslands into Crop Rotations, a Way to Restore Microbiodiversity and Soil Functions. Agriculture, MDPI, 2021, 11 (10), pp.909. ⟨10.3390/agriculture11100909⟩. ⟨hal-03354447v2⟩

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