TAILIEUCHUNG - Báo cáo lâm nghiệp:"Performance and physiology of large containerized and bare-root spruce seedlings in relation to scarification and competition in Québec (Canada)"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Performance and physiology of large containerized and bare-root spruce seedlings in relation to scarification and competition in Québec (Canada)" | Ann. For. Sci. 60 2003 645-655 INRA EDP Sciences 2004 DOI forest 2003057 645 Original article Performance and physiology of large containerized and bare-root spruce seedlings in relation to scarification and competition in Québec Canada Nelson THIFFAULTa b Robert jOBIDONb Alison D. MUNSONa a Centre de recherche en biologie forestière Faculté de foresterie et de géomatique Université Laval Sainte-Foy QC G1K 7P4 Canada b Ministère des Ressources naturelles de la Faune et des Parcs Direction de la recherche forestière 2700 rue Einstein Sainte-Foy QC G1P 3W8 Canada Received 24 June 2002 accepted 17 March 2003 Abstract - In Québec Canada the use of large planting stock is being applied in combination with scarification since herbicide use is forbidden in public forest. Large containerized and bare-root stock of black spruce were planted on two sites located within the sub-boreal mixedwood region of eastern Québec. We analyzed data to detect main effects and interactions among scarification competing vegetation and stock type on seedling growth and physiology during the first three growing seasons. Scarification did not improve seedling water relations third-year height and ground-level diameter and foliar nutrient concentration. After three years the two stock types showed similar water relations and nutritional status but the large containerized seedlings performed slightly better than the large bare-root stock in terms of diameter and height growth. Competing vegetation greatly reduced seedling diameter foliar-N concentration compared to competition-free seedlings. We discuss results in relation with treatment effects on above- and belowground resource availability to newly planted conifers. scarification competing vegetation large seedling growth xylem water potential Résumé - Performance et physiologie de plants de fortes dimensions d épinette produits en récipients et à racines nues en relation avec le scarifiage et la végétation compétitive au Québec .

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