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Enzyme activity in assessing the effects of fumigation with soil smoke

Abstract As a result of fires, in addition to the fire itself and high temperatures, smoke from combustion products has a significant effect on the biota. The aim of the work was to assess the effect of fumigation with combustion products of plant origin on the biology activity of ordinary chernozem. In a series of model experiments, the reaction of soil enzymes (catalase, peroxidase, polyphenol oxidase, invertase, urease, phosphatase) to the smoke of the studied soil with products of thermal decomposition of plant materials (foliage, needles, straw, wood chips) is shown. A significant decrease in the enzyme activity of the studied enzymes was revealed in the range from 7% to 33%, depending on the time spent under the smoke of chernozem (15–120 minutes). The highest sensitivity to fumigation was noted for enzymes of the class of oxidoreductases: catalase, polyphenoloxidase, and peroxidase. Thus, a significant sensitivity and information content of the indicators of the enzyme activity of soils on the effect of smoke has been established, which can be used in monitoring the consequences of fires. Keywords: PYROGENIC EFFECTS, WILDFIRE, COMBUSTION PRODUCTS, CHERNOZEM, BIOLOGY ACTIVITY