Dynamics of fine root distribution after establishment of monospecific and mixed-species plantations of Eucalyptus grandis and Acacia mangium

Da Silva Eduardo Vinicius, De Moraes Gonçalves Jose Leonardo, De Freitas Coelho Selma Regina, Moreira e Moreira Rildo, De Miranda Mello Sergio Luis, Bouillet Jean-Pierre, Jourdan Christophe, Laclau Jean-Paul. 2009. Dynamics of fine root distribution after establishment of monospecific and mixed-species plantations of Eucalyptus grandis and Acacia mangium. Plant and Soil, 325 (1-2) : 305-318.

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : SOIL SCIENCE / Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Introducing N-fixing species in the understorey of fast-growing plantations might be an attractive option to improve soil N status. Intensive fine root sampling was performed in a complete randomized block design to investigate the ability of Eucalyptus grandis and Acacia mangium seedlings in monospecific stands and mixed-species plantations to take up complementary resources from niche exploration of soil layers. The same soil layers were explored by the two species down to a depth of 2 m in monospecific stands. Whilst the development of E. grandis fine roots was not affected by A. mangium trees in mixed-species plantations, A. mangium fine roots were excluded from the upper soil layer from 18 months after planting onwards, despite the paramount importance of that horizon for tree nutrition in highly weathered soils, and were only found deeper and close to A. mangium trees 30 months after planting.

Mots-clés Agrovoc : Eucalyptus grandis, Acacia mangium, forêt mélangée, système racinaire, plantation forestière, compétition végétale, Fixation de l'azote, fertilité du sol

Mots-clés géographiques Agrovoc : Sao Paulo

Classification Agris : F62 - Physiologie végétale - Croissance et développement
K10 - Production forestière
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Da Silva Eduardo Vinicius, USP (BRA)
• De Moraes Gonçalves Jose Leonardo, USP (BRA)
• De Freitas Coelho Selma Regina, USP (BRA)
• Moreira e Moreira Rildo, USP (BRA)
• De Miranda Mello Sergio Luis, USP (BRA)
• Bouillet Jean-Pierre, CIRAD-PERSYST-UPR Ecosystèmes de plantations (BRA)
• Jourdan Christophe, CIRAD-PERSYST-UPR Ecosystèmes de plantations (FRA) ORCID: 0000-0001-9857-3269
• Laclau Jean-Paul, CIRAD-PERSYST-UPR Ecosystèmes de plantations (BRA) ORCID: 0000-0002-2506-214X

Source : Cirad - Agritrop (https://agritrop.cirad.fr/552782/)

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