[ Appréciation de la mise en valeur du bois d'œuvre sur pied au chantier d'exploitation forestière de Nteno à Oshwe, RD Congo ]
Volume 23, Issue 4, July 2018, Pages 405–411
N. NSHOBOLE1, N.J. SEMEKI2, and B.D. KADIATA3
1 Faculté des Sciences Agronomiques, Université Catholique de Bukavu, RD Congo
2 Département de Gestion de Ressources Naturelles, Faculté des Sciences Agronomiques, Université de Kinshasa, RD Congo
3 Département de Gestion de Ressources Naturelles, Faculté des Sciences Agronomiques, Université de Kinshasa, RD Congo
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Logging in the Democratic Republic of Congo remains of selective type characterized at each step by prevailing losses of timber wood. In order to enable the Société de Développement Forestier (SODEFOR) setting up a system of maximum recovery of timber, the major logged tree species, the harvest index (coefficient) of felled trees and the loss of merchant logs were assessed in the forest blocks 91 and 95 of the Nteno concession at Oshwe. SODEFOR has so far mainly exploited 21 tree species of which 7 making up 33% are subjected to intensive logging. These are Millettia laurentii, Guibourtia demeusei, Pterocarpus soyauxii, Staudtia kamerunensis, Prioria oxyphylla, Canarium schweinfurthii and Copaifera mildbraedii. The harvest index of these tree species varied from 6% for Canarium schweinfurthii to 113% for Guibourtia demeusei. This recovery rate was influenced by both the market requirements as well as the density and exploitability size (dimension) of each tree species. Over total wood volume of a felled tree, including that of branches of at least 35 cm diameter, nearly 75% were merchantable while 25% were wasted in forest. For Millettia laurentii, the rate of recovery was the lowest at 64% against 82% recorded in Prioria balsamifera.
Author Keywords: Logging, tree species, harvest index, timber loss.
Volume 23, Issue 4, July 2018, Pages 405–411
N. NSHOBOLE1, N.J. SEMEKI2, and B.D. KADIATA3
1 Faculté des Sciences Agronomiques, Université Catholique de Bukavu, RD Congo
2 Département de Gestion de Ressources Naturelles, Faculté des Sciences Agronomiques, Université de Kinshasa, RD Congo
3 Département de Gestion de Ressources Naturelles, Faculté des Sciences Agronomiques, Université de Kinshasa, RD Congo
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Logging in the Democratic Republic of Congo remains of selective type characterized at each step by prevailing losses of timber wood. In order to enable the Société de Développement Forestier (SODEFOR) setting up a system of maximum recovery of timber, the major logged tree species, the harvest index (coefficient) of felled trees and the loss of merchant logs were assessed in the forest blocks 91 and 95 of the Nteno concession at Oshwe. SODEFOR has so far mainly exploited 21 tree species of which 7 making up 33% are subjected to intensive logging. These are Millettia laurentii, Guibourtia demeusei, Pterocarpus soyauxii, Staudtia kamerunensis, Prioria oxyphylla, Canarium schweinfurthii and Copaifera mildbraedii. The harvest index of these tree species varied from 6% for Canarium schweinfurthii to 113% for Guibourtia demeusei. This recovery rate was influenced by both the market requirements as well as the density and exploitability size (dimension) of each tree species. Over total wood volume of a felled tree, including that of branches of at least 35 cm diameter, nearly 75% were merchantable while 25% were wasted in forest. For Millettia laurentii, the rate of recovery was the lowest at 64% against 82% recorded in Prioria balsamifera.
Author Keywords: Logging, tree species, harvest index, timber loss.
Abstract: (french)
L’exploitation forestière en République Démocratique du Congo est du type sélectif et à chacune de ses étapes, s’observent des pertes de bois. Afin de permettre à la Société de Développement Forestier (SODEFOR) de mettre en place un système de récupération maximale de la matière ligneuse ; les principales essences exploitées, le coefficient de prélèvement de certains arbres et les pertes de bois marchand ont été évalués dans les blocs 91 et 95 du chantier de Nteno à Oshwe. La SODEFOR a exploité essentiellement 21 essences dont 7 soit 33% font l’objet d’une exploitation intensive (Millettia laurentii, Guibourtia demeusei, Pterocarpus soyauxii, Staudtia kamerunensis, Prioria oxyphylla, Canarium schweinfurthii, Copaifera mildbraedii). Le taux de prélèvement des essences a varié de 6% pour Canarium schweinfurthii à 113% pour Guibourtia demeusei. Ce taux est influencé autant par les exigences du marché que par la densité et la dimension d’exploitabilité de chaque essence. Sur le volume total de bois d’un arbre abattu, en y incluant les branches d’au moins 35 cm de diamètre, environ 75% sont commercialisés et 25% abandonnés comme rebuts en forêt. Pour Millettia laurentii, le taux de récupération a été le plus faible de 64% contre 82% pour Prioria balsamifera.
Author Keywords: Exploitation forestière, essence, taux de prélèvement, pertes en bois.
How to Cite this Article
N. NSHOBOLE, N.J. SEMEKI, and B.D. KADIATA, “Assessment of the development of standing timber at the Nteno logging site in Oshwe, DR Congo,” International Journal of Innovation and Applied Studies, vol. 23, no. 4, pp. 405–411, July 2018.
