Plant Soil Environ., 2008, 54(4):163-170 | DOI: 10.17221/390-PSE

Relations between activities and counts of soil microorganisms

E. Popelářová, K. Voříšek, S. Strnadová
Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic

Microbial activities and counts of microorganisms were monitored as a part of research projects at 11 localities on arable land of different soil types during the years 2002-2006. The counts of microorganisms (total bacteria count, actinomycetes, micromycetes, Azotobacter, oligotrophic and spore-forming bacteria) and microbial activities (respiration, ammonification and nitrification tests) were evaluated using summary statistics, analysis of variance and correlation coefficients. The average counts of microorganisms corresponded with usual counts of microbes in arable soils. There were only some differences among localities in Azotobacter counts. Soil respiration is very often used as an indicator of soil microflora activity. Average values of basal respiration were slightly lower (0.45 mg CO2 /h per 100 g dry soil) than usual values, potential respiration with glucose (G) or with ammonium and G (NG) responded to usual values (average G 4.27, NG 9.53 mg CO2 /h per 100 g dry soil). All activities (except actual ammonification) were higher in spring season, but the differences were not significant. There were significant differences in correlation coefficients among the selected criteria; 66% from the total number of correlation coefficients were non-significant, 34% were significant (13% of them was at the significance level 0.05, 10% P < 0.01, and 11% P < 0.001).

Keywords: respiration; ammonification; nitrification; bacteria; fungi; correlation coefficient; soil

Published: April 30, 2008  Show citation

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Popelářová E, Voříšek K, Strnadová S. Relations between activities and counts of soil microorganisms. Plant Soil Environ. 2008;54(4):163-170. doi: 10.17221/390-PSE.
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