Soil biological activity as an indicator of industrial pressure on the forest enviroment (microbiological and biochemical activity)
1987
Zwolinski, J. | Olszowska, G. | Zwolinska, B. (Instytut Badawczy Lesnictwa, Katowice (Poland). Zaklad Gospodarki Lesnej Rejonow Przemyslowych)
The experimental areas were set up in various zones of industrial threat to forests. The areas examined were the Scots pine stands of 4 age class. The quantitative analysis of soil microorganisms showed that with the increase of industrial contamination the number of bacteria distinctly decreased whereas the number of soil actinomyces increased. There was also a distinct change in the quantitative proportions between particular morphological groups of bacteria. The activity of microorganisms being involved in the processes connected with the organic matter decomposition was inhibited on the areas situated within the compass of industrial contamination. Most of the microbiological and enzimic processes in forest soils are negatively correlated with the degree of environment contamination. It appears that the soil biological activity, estimated by means of the widest range of the microbiological and biochemical tests, can be used as an index of the industrial threat to the environment. The following measurements seem to be most useful for the purpose: cellulose decomposition rate, soil respiration rate, dehydrogenase and nitrification avtivities
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