Microorganism and enzyme activities in the soil of landfill sites of Bereg county

Abstract

Our main purpose was to study the microflora and the enzyme activity in soil of polluted areas, and to identify the factors affecting them. For the assessment, the following indices were identified: Gross (total) contents of heavy metals (HM) and the content of available heavy metals. Results of correlation analysis showed positive correlation (r = 0.74) between cellulase and phosphatase activities in the soil, while positive correlation between cellulase and invertase activities (r = 0.26) as well as between phosphatases and invertases (r = 0.24) was shown to be weak. There was also a positive correlation between invertase activity of the landfill soils and content of ammonium ions (r = 0.60). Glucose disintegration intensity (dehydrogenase activity) in the dump soils was considerably related only to the contents of nitrates. The relation was direct (r = 0.66). Negative values of the correlation index characterize the relation of soil dehydrogenase activity with other measured ferments. However, according to our analysis, activity of a given group of ferments was considerably related to the total number of aerobic chemoorganotrophic soil organisms (r = 0.72). In the soil of dumping sites, bacterial coenoses comprise the genera of Actinomyces, Enterobacter, Bacillus, and Coryneform bacteria, with the species of Bacillus brevis, Bacillus cereus, Pseudomonas aeruginosa and Enterobacter aerogenes.

Keywords:

• enzyme activity
• soil microorganisms
• dehydrogenase activity
• invertase activity
• contaminated soil
• heavy metals