Variability in the physico-chemical properties of wood from Eucalyptus robusta depending on ecological growing conditions and forestry practices: The case of smallholdings in the Highlands of Madagascar
Document title: Variability in the physico-chemical properties of wood from Eucalyptus robusta depending on ecological growing conditions and forestry practices: The case of smallholdings in the Highlands of Madagascar
Journal: Maderas : ciencia y tecnología
Database:
System number: 000534516
ISSN: 0718-221X
Authors: 1
1
2
3
1
4
2
Institutions: 1Ecole Supérieure des Sciences Agronomiques Département Eaux et Forêts, Antananarivo. Madagascar
2Universidade de Sao Paulo Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba. Brasil
3CIRAD UR BioWooEB, Montpellier. France
4Université d'Antananarivo Laboratoire des Radio Isotopes Unité "Sol et Changement climatique", Antananarivo. Madagascar
5CIRAD UMR AGAP, Montpellier. France
6Université Montpellier CIRAD AGAP, Montpellier. France
Year:
Volumen: 22
Number: 4
Pages: 425-438
Country: Chile
Language: Inglés
English abstract This study set out to determine which environmental factors of growth and silvicultural practices can affect the properties of Eucalyptus robusta coppice wood and also to study variability in those properties depending on the factors. Hundred and thirty-five coppice logs aged 2 to 10 years were collected from five zones in the Highlands of Madagascar. Wood density at 12% moisture content was measured by X-ray microdensitometry. Chemical properties, such as the total extractives, Klason lignin and holocellulose contents were predicted using near infrared spectrometry prediction models. The results significantly showed (p-value<0,001) that wood density (543 - 836 kg/m3), total extractives (3,1 - 9,8%) and Klason lignin content (24,6 - 35,3%) increased with age, with the opposite occurring for holocellulose (63,8 - 69,9%). Wood density also varied significantly (p-value<0,001) depending on the zones, which was not the case for chemical properties. The densest woods were found at the hottest zones with less acid soils. Woods were less dense in zones, characterized by high rainfall and a soil rich in nitrogen and organic carbon. The plantation spacing, elevation of the zone and soil texture did not significantly affect wood properties.
Keyword: Climate,
Eucalyptus robusta,
Coppice,
Wood properties,
Rotation,
Soil,
Silvicultural practices
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