Spatial variation of earthworm communities and soil organic carbon in temperate agroforestry

Cardinael Rémi, Hoeffner Kevin, Chenu Claire, Béral Camille, Dewisme Antoine, Cluzeau Daniel. 2019. Spatial variation of earthworm communities and soil organic carbon in temperate agroforestry. In : 4th World Congress on Agroforestry. Book of abstracts. Dupraz Christian (ed.), Gosme Marie (ed.), Lawson Gerry (ed.). CIRAD, INRA, World Agroforestry, Agropolis International, MUSE. Montpellier : CIRAD-INRA, Résumé, p. 29. World Congress on Agroforestry. 4, Montpellier, France, 20 Mai 2019/22 Mai 2019.

Matériel d'accompagnement : 1 poster

Résumé : The aim of this study was to assess how soil organic C (SOC) stocks and earthworm communities were modified in agroforestry systems compared to treeless control plots, and within the agroforestry plots (tree rows vs alleys). We used a network of 13 silvoarable agroforestry sites in France along a North/South gradient. Total earthworm abundance and biomass were significantly higher in the tree rows than in the control plots, but were not modified in the alleys compared to the control plots. Earthworm species richness, Shannon index, and species evenness were significantly higher in the tree rows than in the alleys. Total abundance of epigeic, epi-anecic, strict anecic and endogeic was higher in the tree rows. Surprisingly, earthworm individual weight was significantly lower in the tree rows than in the alleys and in the control plots. SOC stocks were significantly higher in the tree rows compared to the control plots across all sites. Despite higher SOC stocks in the tree rows, the amount of available C per earthworm individual was lower compared to the control. The absence of disturbance (no tillage, no fertilizers, no pesticides) in the tree rows rather than increased SOC stocks therefore seems to be the main factor explaining the increased total abundance, biomass, and diversity of earthworms. The observed differences in earthworm communities between tree rows and alleys may lead to modified and spatially structured SOC dynamics within agroforestry plots.

Mots-clés Agrovoc : agroforesterie, système de culture, faune du sol, cycle du carbone, séquestration du carbone

Mots-clés géographiques Agrovoc : France

Classification Agris : F08 - Systèmes et modes de culture
P33 - Chimie et physique du sol
P34 - Biologie du sol

Auteurs et affiliations

• Cardinael Rémi, CIRAD-PERSYST-UPR AIDA (ZWE) ORCID: 0000-0002-9924-3269
• Hoeffner Kevin, Université de Rennes (FRA)
• Chenu Claire, AgroParisTech (FRA)
• Béral Camille, Agroof (FRA)
• Dewisme Antoine, Université de Rennes (FRA)
• Cluzeau Daniel, Université de Rennes (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592747/)

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