ZLV Online

The object of this contribution is an effect assessment of dolomitic limestone powder on soil under harsh conditions of an acidic mountain site. The limestone powder was used to support young Norway spruce (Picea abies /L./ Karst.) plants. The amendment was applied as a top dressing immediately after the trees had been planted, i.e. no incorporation was used. In more concrete terms, 1 kg of the limestone powder was applied onto a soil surface around each tree so that 50 kg of limestone per 100 m2 were applied. The diameter of the „application circles“ with the spruce plants in their centres was approximately 1 m. On the whole, the liming impacts, regarding the dosage applied, were not marked. Liming influenced positively soil reaction, sorption complex parameters and Ca and Mg contents. On the other hand, undesirable impacts were registered as far as soil organic matter and nitrogen are concerned. The P2O5 and K2O contents were also lower in the limed soil. However, it is necessary to consider a more intensive nutrient uptake by better prospering and growing plantations of the limed variant in this case.