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Master Thesis

Évaluation de la santé des sols d'exploitations intensives bio québécoises par l'application du bio-indicateur lombricien

Abstract : The preservation and improvement of soil health are currently major agricultural issues. Assessing the health of a soil requires the use of different indicators, earthworms are a type of bio-indicators to approach the health of a soil. Earthworms play different roles in the physical and chemical dynamics of a soil and are therefore key species for the resilience of the systems. This project aims at studying of the influence of the pedoclimatic context and of the cultural practices on 11 Quebec intensive organic farms by earthworm sampling. A physical extraction coupled with a chemical extraction with mustard were used to measure abundance and dry biomass at the group and species level inside a maize, a soybean and a cereal field for each farm. It was found that the areas studied had the characteristics of cultivated lands with a majority of endogeic and a total approaching on average 100 i.m-2. Acid soils and the intensity of tillage management (depth and frequency) are limiting factors to the development and renewal of earthworms and therefore not favorable to the health soils. The use of cover crops that are conserved or simply cut positively affects eartworms, especially juveniles. An optimum rate of soil organic matter is most often beneficial to endogeic earthworms and also promote the diversity of the earthworm species.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-02372024
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Submitted on : Wednesday, November 20, 2019 - 11:06:33 AM
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Nathan Rondeau. Évaluation de la santé des sols d'exploitations intensives bio québécoises par l'application du bio-indicateur lombricien. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02372024⟩

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