TAILIEUCHUNG - Báo cáo lâm nghiệp: "Forest storm damage is more frequent on acidic soils"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Forest storm damage is more frequent on acidic soils" | Ann. For. Sci. 62 2005 303-311 INRA EDP Sciences 2005 DOI forest 2005025 303 Original article Forest storm damage is more frequent on acidic soils Philipp MAYERa Peter BRANGa Matthias DOBBERTINa Dionys HALLENBARTERb Jean-Pierre RENAUDc Lorenz WALTHERTa Stefan ZiMMERMANNa a Swiss Federal Institute for Forest Snow and Landscape Research WSL Zurcherstrasse 111 8903 Birmensdorf Switzerland b Institut fur Waldwachstumsforschung WAFO Universităt fur Bodenkultur Wien Peter-Jordanstrasse 82 1190 Wien Austria c Département de la santé des Forêts Antenne spécialisée INRA route de l Arboretum 54280 Champenoux France Received 26 April 2004 accepted 31 August 2004 Abstract - We assessed the effect of chemical soil properties and acidifying depositions sulphur and nitrogen on the occurrence of storm damage during the storms Lothar and Martin December 1999 . Data from 969 sites in France southern Germany and Switzerland was analysed with multiple logistic regression models. Variables found to be significantly related to storm damage which was mainly scattered damage in our study were country soil pH proportion of coniferous trees slope humus type stand height and altitude . Wind speed was not significantly related to storm damage in the global model but only in the model for France. Soil pH was one of the most significant factors with a lower pH on damaged plots. Atmospheric deposition rates were significantly associated with soil pH but not directly with storm damage. Even though the mechanisms involved in the relationship between soil acidity and storm damage are still poorly understood soil acidity should be considered a significant risk factor. Moreover this large-scale study confirms that increasing the proportion of deciduous trees would reduce the susceptibility of forests to storm damage. deposition logistic regression soil pH wind damage wind speed Résumé - Les forets au sol acide sont plus souvent endommagées par les tempêtes. Nous avons étudié l effet des .

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