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National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Emissions of greenhouse gases (N2O and CO2) from pasture soil as a result of activity of soil microbial community - preliminary results
 Šimek, Miloslav ; Hynšt, Jaroslav ; Brůček, Petr ; Čuhel, Jiří
Cattle overwintering area was shown an important point source of N2O and CO2. The emissions of N2O were mostly directly related to the rate of animal impact as the greatest fluxes of N2O and the highest total cumulative N2O emissions as well were found at the most impacted site. The fluxes of N2O were however very variable in time and most of N2O was emitted during several short events in spring or in winter. Laboratory experiments suggested that total amount of nitrogen escaping from soil from impacted sites is much greater than indicated by field measurements of N2O fluxes and molecular nitrogen (N2) was shown as the main nitrogen gas. It is hypothesized that soil pH is a crucial soil factor controlling the mole fraction of N2O: under slightly alkaline conditions in severely impacted soils, denitrification is completed and most of nitrogen escapes from the soil as N2; under more acidic conditions, however, the activity of nitrous oxide reductase is partly reduced.
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Degradation of soil by cattle on so-called winter pasture and its influence on nitrous oxide emissions
 Šimek, Miloslav ; Brůček, Petr ; Uhlířová, Eva ; Šantrůčková, Hana ; Elhottová, Dana ; Kamír, V.
Results on the measurements of nitrous oxide emissions from cattle overwintering area located in South Bohemia are summarized. It is shown that the site investigated represents an important source of greenhouse gases including nitrous oxide and carbon dioxide. Long-term presence of animals led to changes in soil microbial community too.
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Relationship between nitrous oxide emission and physical characteristics of pasture soil - confrontation of theory with practical experience
 Šimek, Miloslav ; Brůček, Petr
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Soil water, air, and microbial processes
 Šimek, Miloslav
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