Auswirkungen der Wintersalzstreuung auf den Mineralstoffhaushalt von Linden

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Abstract
Effects of de‐icing salts (NaCl) on the mineral status of lime‐trees.The long time effect of de‐icing salt on the mineral status of the roadside trees Tilia cordata and Tilia tomentosa are investigated after mild winters. Despite the low content of chloride in the soils injured trees contain high amounts of chloride and also sometimes soidum in leaves, bark and wood. There was a good correlation between the accumulation of sodium chloride or chloride alone and the degrees of visible injury of the leaves (chlorosis or necrosis), but no correlation exists for calcium, magnesium and potassium levels. However, in branches and stems increasing amounts of sodium chloride caused an decrease of potassium. An early recognition of salt injury in trees is possible by analysing the ion composition of the interior bark. Levels of more than 7.5 meq chloride or/and 5.0 meq sodium per 100 g dry bark substance are indicating salt injuries.