Enzymatic activity of upper layers of forest soils at upper and lower mountain regions in Karkonosze National Park
Intensity of biochemical activity of upper layer of forest soil due to the distance from the tree stem base was the aim of the presented study. Soil samples were collected in spring and autumn from the organic layer and the distances of 30 cm and 100–200 cm from the stem base. 4 sites – 2 located in the lower mountain region and another 2 – in the upper one, all situated in the Karkonoski National Park were used to obtain soil samples, of which urease, asparaginase, acid phosphatase and dehydrogenases activity, as well as organic carbon content was then determined. Preliminary results showed that activity of selected enzymes was higher in the samples taken 100–200 cm apart the stem base compare to the samples located close to the tree both in the lower and in the upper mountain regions. Samples collected in the upper mountain region were characterized by higher, than samples from the lower mountain region, activity of acid phosphatase, urease and asparaginase and the higher content of organic carbon. Activity of dehydrogenases that reflect overall development of soil microorganisms was in contrast, twofold lower in samples from upper mountain region than the lower one, what might indicate the inactivation of those enzymes.
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