Structure, properties and functions of grassland sod in mountain seminatural and natural ecosystems II.
2007
Ondrášek, Ľ., Slovenské centrum poľnohospodárskeho výskumu, Banská Bystrica (Slovak Republic). Výskumný ústav trávnych porastov a horského poľnohospodárstva | Krajčovič, V., Slovenské centrum poľnohospodárskeho výskumu, Banská Bystrica (Slovak Republic). Výskumný ústav trávnych porastov a horského poľnohospodárstva
In connection to the first part of this paper presentation dealing with problems of grassland sod, the second part addresses soil processes within a carbon and nitrogen complex, involving soil and microbiological analyses of two or three fertilization treatments and two management regimes. Basic parameters are Cox, Nt and the ratio of C/N. Long-term averages of their content, as well as variability and dynamics of changes during growing seasons are monitored. Experiments at 48 sites in 10 regions, at three levels of altitude on southern and northern expositions enable evaluating relations of Cox content with orographic factors. In the C-complex, an easily decomposable share, marked CMH2SO4 was determined, and the impact of various management regimes considering the quality of organic matter was assessed. An important problem to consider is soil respiration and CO2 output into the atmosphere, as well as its uptake in the process of photosynthesis, which is higher compared to output in a 1.4 : 1.0 ratio. Soil CO2 respiration has been monitored over the entire growing season for 26 years under various conditions. The research is also focused on the carbon microbial biomass (MB-C), as indicator of biological activity and as a marker for comparison of three grassland management technologies.
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