Nutrition of Forest Trees stocking on Gypsum Sites | Die Ernährung von Waldbäumen auf Gipsstandorten
1998
Heinze, Martin
The pure gypsum soils of the Kyffhäuser Mountains and of the Southern Hercynian Mountains have an extremely high calcium and sulphurcontent and a low potassium and aluminium content compared to silicate soils. On the other hand, birch(Betula pendula), beech(Fagus sylvatica) and black pine(Pinus nigra) growing on the gypsum sites are characterized by a relatively well-balanced nutrition. This demonstrates the active selective and exclusive ability of the trees.The high calcium concentration in the soil solution does not impede the uptake of the other investigated nutrients.No calcium — potassium antagonism occurs.The leaves of beeches stocking on the Kyffhäuser gypsum sites contain 0,43% S. This is twice the sulphur content of SO₂-damaged beeches growing in the Saxo-Bohemian parts of the Ore Mountains (0,22% S). The beeches stocking on the gypsum sites are healthy.When assessing leaf sulphur concentration one has to distinguish between two things:On the one hand, the leaf sulphur concentration is the expression of the sulphur nutrition in the normal physiological way, whereas it is a bio-indicator of SO₂ stress on the other.A pot trial with seedlings of beech and spruce(Picea abies) on rhyolith and gneiss soil substrate, applying increasing dosages of sulphate or acids has shown that high sulphate anion concentrations in the soil do not cause any damage to the plants. The observed damage is attributable to high proton concentrations.
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