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Introducing Acacia mangium trees in Eucalyptus grandis plantations: consequences for soil organic matter stocks and nitrogen mineralization

Voigtlaender Maureen, Laclau Jean-Paul, De Moraes Gonçalves Jose Leonardo, De Cassia Piccolo Marisa, Moreira Marcelo Zacarias, Nouvellon Yann, Ranger Jacques, Bouillet Jean-Pierre. 2012. Introducing Acacia mangium trees in Eucalyptus grandis plantations: consequences for soil organic matter stocks and nitrogen mineralization. Plant and Soil, 352 (1-2) : pp. 99-111.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : SOIL SCIENCE / Quartile : Q1, Sujet : PLANT SCIENCES

Abstract : Background and aims Eucalyptus plantations cover 20 million hectares on highly weathered soils. Large amounts of nitrogen (N) exported during harvesting lead to concerns about their sustainability. Our goal was to assess the potential of introducing A. mangium trees in highly productive Eucalyptus plantations to enhance soil organic matter stocks and N availability. Methods A randomized block design was set up in a Brazilian Ferralsol soil to assess the effects of mono-specific Eucalyptus grandis (100E) and Acacia mangium (100A) stands and mixed plantations (50A:50E) on soil organic matter stocks and net N mineralization. Results A 6-year rotation of mono-specific A. mangium plantations led to carbon (C) and N stocks in the forest floor that were 44% lower and 86% higher than in pure E. grandis stands, respectively. Carbon and N stocks were not significantly different between the three treatments in the 0-15 cm soil layer. Field incubations conducted every 4 weeks for the two last years of the rotation estimated net soil N mineralization in 100A and 100E at 124 and 64 kg ha?1 yr?1, respectively. Nitrogen inputs to soil with litterfall were of the same order as net N mineralization. Conclusions Acacia mangium trees largely increased the turnover rate of N in the topsoil. Introducing A. mangium trees might improve mineral N availability in soils where commercial Eucalyptus plantations have been managed for a long time. (Résumé d'auteur)

Mots-clés Agrovoc : Acacia mangium, Eucalyptus grandis, Culture en mélange, Fixation de l'azote, Fertilité du sol, Plantation forestière, Matière organique du sol, Ferralsol

Mots-clés géographiques Agrovoc : Brésil

Classification Agris : K10 - Forestry production
P33 - Soil chemistry and physics
P35 - Soil fertility

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

Auteurs et affiliations

  • Voigtlaender Maureen, Universidade de São Paulo (BRA)
  • Laclau Jean-Paul, CIRAD-PERSYST-UMR Eco&Sols (BRA) ORCID: 0000-0002-2506-214X
  • De Moraes Gonçalves Jose Leonardo, Universidade de São Paulo (BRA)
  • De Cassia Piccolo Marisa, CENA (BRA)
  • Moreira Marcelo Zacarias, CENA (BRA)
  • Nouvellon Yann, CIRAD-PERSYST-UMR Eco&Sols (BRA)
  • Ranger Jacques, INRA (FRA)
  • Bouillet Jean-Pierre, CIRAD-PERSYST-UMR Eco&Sols (BRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/563536/)

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