Impact of biochar application dose on soil microbial communities associated with rubber trees in North East Thailand

Herrmann Laetitia, Lesueur Didier, Robin Agnès, Robain Henri, Wiriyakitnateekul Wanpen, Bräu Lambert. 2019. Impact of biochar application dose on soil microbial communities associated with rubber trees in North East Thailand. Science of the Total Environment, 689 : 970-979.

https://doi.org/10.1016/j.scitotenv.2019.06.441

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Biochar is a potential tool to mitigate climate change by enhancing C sequestration in soils, but its use as a soil amendment to improve soil fertility and crop yields is still a contentious subject. In North East (NE) Thailand, biochar has been promoted to restore soil fertility in rubber tree plantations. Despite this, there is scarce information on the impact of biochar application on the soil biota, particularly on microbial communities associated with rubber trees. The effects of increasing doses of biochar on microbial communities were investigated in a rubber tree plantation in NE Thailand, 28 months after application. Biochar application resulted in increases of soil pH and nutrient contents and also had an impact on both bacterial and fungal communities. Changes in microbial composition and structure were observed although fungal communities were more markedly affected than bacterial communities. The nature and magnitude of the observed changes were strongly related to soil properties (pH, soil moisture and P content), while biochar dose (5, 10 or 20 tons/ha) effect was not significant. Our results highlight the need for additional research for a better understanding of the impact of biochar application on soil microbial communities and further cascading effects on ecosystem functions.

Mots-clés Agrovoc : charbon de bois, fertilisation, séquestration du carbone, atténuation des effets du changement climatique, microbiologie, biologie du sol, Hevea brasiliensis

Mots-clés géographiques Agrovoc : Thaïlande

Mots-clés libres : Biochar, Bacterial communities, Fungal communities, Rubber tree, North East Thailand

Classification Agris : P40 - Météorologie et climatologie
K50 - Technologie des produits forestiers
F04 - Fertilisation
P33 - Chimie et physique du sol

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

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