NDLI: The potential of plantations of Terminalia superba Engl. & Diels for wood and biomass production (Mayombe Forest, Democratic Republic of Congo)

Content Provider	Springer Nature Link
Author	Ridder, Maaike Hubau, Wannes Bulcke, Jan Acker, Joris Beeckman, Hans
Copyright Year	2010
Abstract	• In the 1940s–1950s, large limba (Terminalia superba Engl. & Diels) plantations were established in the Democratic Republic of Congo to reduce the pressure on the natural forests. • The objective of this study was to evaluate the potential of these long-rotation plantations as production forests (timber) and carbon sinks. • Five different plantations, between 50 and 58 years old, were sampled. Over a sample surface of more than 73 ha, the diameter above buttresses of 2 680 trees, bole height of 265 trees and tree height of 128 trees was measured. • To estimate the commercial volume, a nonlinear power law regression was used (R 2 = 0.95). A power law variance function was applied to counter heteroscedasticity of the residual plot. Estimates of commercial tree and stand volume at 50 to 58 y were 5.6 ± 4.1 m3 and 183.9 ± 135.0 m3 ha−1. Stand volumes appear low but are explained by a large decrease in tree density. However, the mean volume increment of 3.2–3.7 m3 ha−1 y−1 corresponds well with teak plantations of a similar age. For limba, aboveground biomass and carbon estimates of this study (resp. 108.4 and 54.2 Mg ha−1) differ significantly from those of existing aboveground biomass models (resp. 135.7–143.9 Mg ha−1 biomass and 67.9–72.0 Mg ha−1 C). All aboveground biomass and carbon estimates for T. superba stands were lower than for the estimates of young fast-growing plantations like Tectona grandis L. f., Eucalyptus spp. and Acacia spp. (≤ 30 y). • Dans les années 1940–1950, de grandes plantations de limba (Terminalia superba Engl. & Diels) on été mises en place en République Démocratique du Congo afin de réduire la pression sur les forêts naturelles. • L’objectif de cette étude était d’évaluer le potentiel de ces plantations anciennes comme forêts de production de bois d’œuvre et puits de carbone. • Cinq plantations différentes, âgées de 50 à 58 ans, ont été échantillonnées. Sur une surface de plus de 73 ha, le diamètre au-dessus des contreforts de 2 680 arbres, la hauteur de fût de 265 arbres et la hauteur totale de 128 arbres ont été mesurés. • Le volume commercial a été estimé à l’aide d’une régression du type loi de puissance (R 2 = 0.95). Une fonction de variance du même type a été adoptée pour supprimer l’hétéroscedasticité des résidus. Le volume commercial a été estimé à 5.6 ± 4.1 m3 par arbre et 183.9 ± 135.0 m3 ha−1. Ce dernier volume semble faible mais peut être expliqué par une chute de la densité d’arbres. Toutefois, l’accroissement moyen en volume (3,2–3,7 m3 ha−1 an−1) correspond bien avec des plantations de teck d’un âge comparable. Pour le limba, il y a une différence significative entre les valeurs d’estimation de biomasse et de quantité de carbone épigés dans cette étude (resp. 108,4 Mg ha−1 et 54,2 Mg ha−1) et dans les modèles existants (resp. 135,7–143,9 Mg ha−1 et 67,9–72,0 Mg ha−1 C). Ces estimations de biomasse et de quantité de carbone épigés pour T. superba sont également inférieures à celles de jeunes plantations d’espèces à croissance rapide comme Tectona grandis L. f., Eucalyptus spp. and Acacia spp. (≤ 30 ans).
Starting Page	501
Ending Page	501
Page Count	1
File Format	PDF
ISSN	12864560
Journal	Annals of Forest Science
Volume Number	67
Issue Number	5
e-ISSN	1297966X
Language	French
Publisher	Springer Netherlands
Publisher Date	2010-01-01
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Terminalia superba Afrique centrale plantation volume biomasse Forestry Wood Science & Technology Forestry Management Tree Biology Environment
Content Type	Text
Resource Type	Article
Subject	Ecology Forestry

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