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Impact of Heart Rot of <i>Pericopsis elata</i>(Harms) Van Meeuwen on yield at Harvest in Production Forests in South-Eastern Cameroon

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Open Journal of Forestry 2021年第3期11卷 315-329页

作者： René Samuel Gweth Likaa Godswill Ntsomboh-Ntsefong Fridolin Choula Nnanga M. Ruth Laure François Essouma Manga Jean-Lagarde Betti Alain Dongmo Ndongo Din Department of Plant Biology Faculty of Sciences University of Douala Douala Cameroon Department of Plant Biology Faculty of Sciences University of Yaounde 1 Yaounde Cameroon Institute of Agricultural Research for Development (IRAD) Yaounde Cameroon Department of Biology of Animal Organisms Faculty of Sciences University of Douala Douala Cameroon

This study of the impact of heart rot of Pericopsis elata on logging yield was conducted in Libongo, in three logging concessions of the Société d'Exploitation Forestière et Agricole du Cameroun (SEFAC). An inventory of 92 P. elata stumps in four Annual Cutting Areas (AACs) divided among three Forest Management Units (FMUs) distinguished by Minimum Operating Diameter (MOD) revealed that 22 stumps were rotten. Decay was visible on stumps with a diameter of more than 100 cm with a frequency of occurrence of 23.91%, a percentage of abandonment of 55.20% and a yield of 44.79%. The most important economic loss was revealed on 9 abandoned whole logs that cumulated a volume of 145.547 m3. The correlation between the diameter of the stumps and that of the decay gives a coefficient or correlation rate r = 0.31. The MOD for P. elata could be 80 cm and covers the biological risk class. The results indicate that P. elata shows an increasing gradient of decay rate with increasing tree diameter, resulting in a loss of material for larger diameter trees, and consequently a decrease in material yield at processing.

关键词： Pericopsis elata Minimum Operating Diameter Heart Rot Stump material yield

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