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Báo cáo lâm nghiệp: "Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils. | Ann. For. Sci. 61 2004 711-719 INRA EDP Sciences 2004 DOI 10.1051 forest 2004057 711 Original article Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils Bruno HÉRAULTa Daniel THOENa Olivier HONNAYb a Department of Environmental Sciences Management University of Liège Avenue de Longwy 185 6700 Arlon Belgium b Laboratory for Forest Nature and Landscape Research University of Leuven Vital Decosterstraat 102 3000 Leuven Belgium Received 23 February 2004 accepted 15 June 2004 Abstract - In the perspective of the conversion of Norway spruce plantations there is a need for foresters to assess the potential of the natural woody species regeneration. We studied 50 Norway spruce plantations on alluvial soils throughout the Grand-duché de Luxembourg and compared the regeneration characteristics species composition spatial heterogeneity with 42 riverine deciduous stands the target communities . Within the Norway spruce plantations Fraxinus excelsior and Acer pseudoplatanus were the main regenerating species probably because of their very good dispersal abilities. Norway spruce seedlings were quasi-absent. Low Norway spruce densities and baserich soils local factors as well as proximity of riverine deciduous forests regional factor strongly favoured the regeneration of a suite of broad-leaved species. The thickness of Norway spruce litter did not appear to be a limiting factor at least for large-seeded tree seedlings. The spatial heterogeneity of the woody regeneration was rather similar in coniferous and deciduous stands. We conclude that for the development of multifunctional forests the spontaneous regeneration under low-dense Norway spruce stands on base-rich soils provides a valuable starting point. Picea abies floodplain spontaneous rejuvenation spatial heterogeneity Luxembourg Résumé - Evaluation des potentialités de regeneration naturelle pour la conversion des plantations d epiceas sur sols .