DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 5-6/2023 str. 35 <-- 35 --> PDF |
the soil temperature were followed by the reduction of CO2 emission. With soil temperature of 21±2 oC, soil water content had additional effect on the CO2 flux, where the values of flux were greater when soil moisture was increased. Obtained values of the flux on each plot were low at the end of the observation period, since soil temperature and soil moisture were significantly reduced. The coefficient of variation for CO2 flux is illustrated in Figure 6 for each plot. The average emission varied the least (CV = 30.64%) within the control plot, while the greatest value of coefficient of variation (CV) was detected within the Plot 2 (43.23%). Similar variation around the middle value (CV = 42.40%) was obtained within the third plot. The plots which were under the anthropogenic influences had generally higher emission compared to the control plot. The greatest average value of CO2 flux as well as the least organic carbon content in anthropogenic soil indicate that the stability of the organic carbon is very low compared to Gleysol (Plot 1 and Plot 2). The simple linear relationship of soil respiration and soil temperature at the depth of 5 cm for each plot is shown in Figure 7. The coefficient of determination (R2) ranged from 0.04 to 0.60, whereas the greatest value of R2 is obtained for the Plot 3. Reliable relationships between CO2 flux and soil water content were observed within the Plot 1 and Plot 2 (R2 = 0.30 and R2 = 0.72, respectively), (Figure 8). Soil |