The efflux of CO2 from the soil (soil respiration) represents on of the largest fluxes in C-cycle. This paper estimates the contribution of organic and inorganic sources to soil CO2 degassing in calcareous grasslands of karst region. For the studying period it was found that inorganic sources contribute in average 12% to soil CO2 but their contribution can be as high as 41% in growing season. They have to be regarded as an important source of CO2 in karstic soil.
COBISS.SI-ID: 3420838
Root colonization with arbuscular mycorrhizal fungi and glomalin-related soil protein (GRSP) concentration in hypoxic soils in natural CO2 springs Changed ratios of soil gases that lead to hypoxia are most often present in waterlogged soils, but can also appear in soils not saturated with water. In natural CO2 springs (mofettes), gases in soil air differ from those in typical soils. In this study, plant roots from the mofette area Stavešinci (Slovenia) were sampled in a spatial scale and investigated for AM fungal colonization. AM fungi were found in roots from areas with high geological CO2 concentration, however mycorrhizal intensity was relatively low and no correlation between AM fungal colonization and soil pattern of CO2/O2 concentrations (up to 37% CO2) was found. The relatively high abundance of arbuscules in root cortex indicated existence of functional symbiosis at much higher CO2 concentrations than normally found in soils. In addition, concentration of two different glomalin-related soil protein fractions – EE-GRSP and TG-GRSP – was measured. No significant correlation between any of the fractions and soil gases was found, however the concentration of both fractions was significantly higher in the upper 0–5 cm, compared to the 5–10 cm layer of the soil.
COBISS.SI-ID: 7037049
This complex investigation was performed in the combination of projects J4-3618 and J4-4224. Tartary buckwheat (TBW; Fagopyrum tataricum Gaertn.) and common buckwheat (CBW; F. esculentum Moench) cookies were produced from both types of buckwheat flour. TBW cookies contained 2,530 mg rutin and 1,620 mg quercetin kg/dry weight (DW). CBW cookies contained less rutin, i.e. 270 mg kg/ DW, while quercetin was below the detection limit. A double-blind random crossover study was performed with 62 healthy women. Both types of cookies had positive effects on symptoms compared with the baseline. TBW initially reduced fatigue symptoms (p ( 0.05). In conclusion, buckwheat consumption generally reduced the symptoms analyzed in this study. A daily consumption of 359.7 mg rutin-equivalents day-1 in the form of TBW cookies reduced fatigue in healthy subjects and it did not increase the levels of symptoms.
COBISS.SI-ID: 7159161