Soil microbial communities and dehydrogenase activity depending on farming systems

Abstract

The aim of study was to compare the effect of farming methods on soil microbial communities and dehydrogenase activity (DHA). During 2008During -2013, in the five-field crop rotation the following treatments were carried out: ORG -organic; ORGFYM -organic with cattle manure; CONFYM -conventional (cattle manure, mineral fertilizers and pesticides were used). From the treatments soil samples in three replicates were taken for microbiological tests in September yearly. Total bacteria and cellulose decomposing bacteria were determined as a number of colony forming units per g of dry soil. Soil DHA was determined in accordance with Tabatabai (1982). Solid cattle manure applied in the ORGFYM rotation increased significantly (P < 0.05) the number of total bacteria and cellulose decomposing bacteria (by 19.4% and 45.3%, respectively), and DHA by 22.7%. There appeared no clear and significant differences in effects between ORGFYM and CONFYM treatments, as an average of experiment period. In some cases, the use of certain pesticides in CONFYM treatment significantly affected the microbe numbers and soil DHA.

Impact of temperature on the biological properties of soil

“…Temperature is one of the main factors that determine the activity of soil microorganisms (Järvan et al, 2014). Microorganisms are involved in numerous processes controlling the flow of nutrients through specific enzymes located inside the cell (Borowik et al, 2014;Jastrzębska and Kucharski, 2007;Wyszkowska et al, 2013), and their activity is dependent, among others, on the temperature.…”

“…Microorganisms are involved in numerous processes controlling the flow of nutrients through specific enzymes located inside the cell (Borowik et al, 2014;Jastrzębska and Kucharski, 2007;Wyszkowska et al, 2013), and their activity is dependent, among others, on the temperature. Järvan et al (2014) suggest that temperature is one of the most important factors influencing the count and occurrence of microorganisms and is also a determinant of the activity of intracellular and extracellular enzymes. The temperature of the soil affects the stability and resistance of microorganisms (D'Amico et al, 2006) as well as their activity, regardless of their feeding type.…”

Stimulation of soil microbiological activity by clinoptilolite: The effect on plant growth

“…All the factors that affect nutrient cycling in soil have crucial impact on plant production. The processes engaged in nutrient cycling are controlled by soil enzymes and microorganisms (Järvan et al, 2014). Dehydrogenases are one of the most important enzymes in soil, indicating total soil microbial activity (Gu et al, 2009), soil fertility (Wolińska & Stepniewska, 2012) and oxidative activity of soil microorganisms.…”

“…Dehydrogenases are one of the most important enzymes in soil, indicating total soil microbial activity (Gu et al, 2009), soil fertility (Wolińska & Stepniewska, 2012) and oxidative activity of soil microorganisms. Dehydrogenase is affected by the same factors that influence abundance of microorganisms (Järvan et al, 2014;Wolińska & Stepniewska, 2012). Bagherifam et al (2014) recorded that zeolites increased the activity of dehydrogenase in arsenic contaminated soil.…”

Bioremediation Potential Assessment of Plant Growth-Promoting Autochthonous Bacteria: a Lignite Mine Case Study

“…1), illustrating sensitivity to soil acidity, given that they are typically found in soil pH 7.1-9.0 [19,20]. As a bioindicator of soil fertility [21,22], OS DHA activity was determined to be 0.24x10 -5 μg TPF/g/h ( Table 2). …”