Soil property effects on the natural durability, extractive content and colour of teak (Tectona grandis L.f) wood in Togo

Kokutse Adzo Dzifa, Amusant Nadine, Boutahar Nabila, Chaix Gilles. 2009. Soil property effects on the natural durability, extractive content and colour of teak (Tectona grandis L.f) wood in Togo. In : Proceedings of the Sixth Plant Biomechanics Conference, November 16th - 21th, Cayenne, French Guyana. Thibaut Bernard (ed.). UMR Ecofog. Kourou : ECOFOG, pp. 529-535. Plant Biomechanics Conference. 6, Cayenne, Guyane française, 16 November 2009/21 November 2009.

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Abstract : Togolese teak is highly resistant to pathogen attack, but natural durability and wood colour vary according to plantation sites and geographical zones. Therefore, further information concerning the influence of environmental parameters and their effects on teak wood quality is necessary and it could be possible to improve these characteristics through tree breeding and silviculture programs in Togo. In order to examine the influence of soil properties on teak wood characteristics, 321 wood samples issued from 20 trees were exposed to two fungi: #Antrodia sp#., and #Coriolus versicolor#. Depending on type of soil in which they grew, trees had been randomly selected in two different sites in the same climatic area in Togo. The colour parameters of each sample were measured using the CIELAB system and total extractive content was determined using the Accelerated Solvent Extraction (ASE) procedure. Results showed a significantly lower total extractive content (11.1%) for trees that grew on hydromorphic tropical ferruginous (HTF) soil than trees from drained ferruginous soil (12.8%). Samples from HTF soil were lighter and the redness a* and yellow-blueness b* were significantly higher. Independently of soil quality, all the trees were highly durable regarding decay by #C. versicolor#. With #Antrodia sp#., 90 % of the trees from both sites were highly durable and only 10% were durable. However, samples from HTF soil were less durable with regard to the two fungi. (Résumé d'auteur)

Classification Agris : K50 - Processing of forest products
P33 - Soil chemistry and physics
P34 - Soil biology
F50 - Plant structure

Auteurs et affiliations

  • Kokutse Adzo Dzifa, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Amusant Nadine, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Boutahar Nabila, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Chaix Gilles, CIRAD-BIOS-UPR Génétique forestière (FRA)

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