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Production of CO2 from tillage and conservation-tillage fields
Červinská, Taťána ; Frouz, Jan (advisor) ; Hynšt, Jaroslav (referee)
Soil respiration was studied in situ, using an apparatus Li 8000, together with potential microbial respiration, microbial biomass, enzymatic activity and content of organic substances in soil at different depths in two types of agricultural technologies: the conventional tillage cultivated fields and the fields on which were farmed using soil conservation technologies, here were used minimization and no tillage technology. These areas were sown by oilseed rape in the first year and a pea in the second year of observation (2010 and 2011). Study was carried out on long term experimental plots, established in 1995, in Prague Ruzyně to estimate the impact of these agricultural technologies on the accumulation or loss of carbon from the soil. It was found that the fields under cultivation tillage had significantly higher CO2 flux from soil than in areas with soil conservation technologies. CO2 flux was also influenced by external conditions, especially temperature. Total microbial biomass did not differ between technologies. However, they differ in terms of organic matter content. Minimizing resulted in significantly higher organic carbon content than the remaining fields. Areas under soil conservation technologies had a significantly higher content of humic acids. Cultivated fields plowing, or soil...
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