TAILIEUCHUNG - Báo cáo khoa học: "Mineral nutrients of beech (Fagus sylvatica) bark in relation to frost sensitivity and soil treatments in southern Sweden"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Mineral nutrients of beech (Fagus sylvatica) bark in relation to frost sensitivity and soil treatments in southern Sweden. | 1 Ann. For. Sci. 57 2000 1-8 INRA EDP Sciences 2000 Original article Mineral nutrients of beech Fagus sylvatica bark in relation to frost sensitivity and soil treatments in southern Sweden Anna Maria Jonsson Dept. of Ecology Forest Ecology Lund University Ecology Building 223 62 Lund Sweden Received 25 May 1999 accepted 16 August 1999 Abstract - Concentration of nutrients and balance between nutrients in trees can affect tree vitality and are dependent on soil conditions and atmospheric deposition. The aim of this investigation was to survey the concentration of nutrients in beech bark and to look for relationships with the frost sensitivity of the bark. Beech trees with bark lesions were compared to undamaged beech trees on five experimental sites with control plots plots treated with nitrogen ash or lime. Trees treated with lime had increased Ca Al ratio and decreased concentrations of Mn and B. Negative influence from N fertilization could be traced in the concentration of nutrients in the bark seven years after treatment but the absence of new lesions indicated that the vigour of the trees has increased. The frost sensitivity was correlated to the nutrient content. Trees with lesions had higher concentrations of N and Al indicating influence of soil acidity. index of injury lime nitrogen wood ash Résumé - Influence de la composition en elements minéraux de l ecorce en relation avec les traitements chimiques apportés au sol sur la sensibilité au froid du hêtre dans le sud de la Suède. La concentration et l equilibre des elements minéraux dans les arbres peut affecter leur vitalité et sont dependants des conditions de sol et des dépôts atmosphériques. Le but de ce travail a été d etudier la concentration des éléments minéraux dans l écorce du hêtre et d essayer de mettre en évidence des relations avec la sensi-bilité au froid des écorces. Les arbres avec des lésions au niveau de l écorce étaient comparés avec des arbres indemnes dans cinq sites expérimentaux .

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