Characterization of soil organic carbon and its fraction labile carbon in ecosystems
2009
Pospíšilová, Ľ., Mendel University of Agriculture and Forestry, Brno (Czech Republic) | Petrášová, V., Mendel University of Agriculture and Forestry, Brno (Czech Republic) | Foukalová, J., Mendel University of Agriculture and Forestry, Brno (Czech Republic) | Pokorný, E., Mendel University of Agriculture and Forestry, Brno (Czech Republic)
Total carbon content, labile carbon content and biological properties in selected Cambisols were determined. Our work represents a part of long-term field experiments that have been carried out in the Czech Moravian Upland since 1999. Among the basic soil parameters basal respiration activity and microbial biomass amount were determined. Results showed low humus content. Higher C and N contents were determined in grassland soils and C/N ratio was middle (8-11). Humic substances quality was low (HA/FA ratio was less than 1). Humification degree was middle. Absorbance in UV-VIS spectral range was low and calculated color indexes were high (more than 4). Grassland soils showed higher microbial biomass amount, but lower labile carbon content to compare with arable soils. Basal respiration was low and varied from 0.22 - 0.60 mg CO2.per (100g) per.h. Bacterial biomass was higher in grassland 200 microg C per g dry weight to compare with arable soils (about 100 microg C per g). To characterize connection between carbon and nitrogen content, and their microbial utilization the complex factor was calculated.
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