# Carbon Storage Potential and Carbon Dioxide Emissions from Mineral-Fertilized and Manured Soil
## 3 Results
### Co\({}_{2}\)-C Soil Emissions  
The daily and cumulative CO\({}_{2}\)-C soil emissions are presented in Table 3. The average daily CO\({}_{2}\)-C soil emissions ranged between 0.93 and 108.58 kg CO\({}_{2}\)-C ha\({}^{-1}\) and between 1.85 and 100.64 kg CO\({}_{2}\)-C ha\({}^{-1}\) for the CaNPK and the Ca + M treatments, respectively. Consequently, the mean cumulative CO\({}_{2}\)-C soil emissions recorded in the Ca + M treatment exceeded the CO\({}_{2}\)-C soil emissions from the CaNPK treatment by 36.4% and 73.1% in the first and second year, respectively. In both years, the differences were statistically significant (Table 3). The seasonal variation in the CO\({}_{2}\)-C soil emission values is presented in Figure 4. Irrespective of the soil fertilization, in both years, the soil CO\({}_{2}\)-C fluxes recorded at the beginning and the end of the growing period were comparatively low. On almost all the measurement days, the CO\({}_{2}\)-C soil emissions recorded in the Ca + M soil exceeded the records for the CaNPK soil. This pattern was more evident in the second testing year than in the first (Figure 4). \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Treatment**} & \multirow{2}{*}{**Soil Horizons**} & \multicolumn{2}{c}{**SOC**} & **TN** & \multirow{2}{*}{**C:N**} & \multirow{2}{*}{**pH**} \\ \cline{3-3} \cline{5-6}  & & \(\mathbf{g\ C\ kg^{-1}}\) & & & & \\ \hline \multirow{4}{*}{CaNPK} & Ap (0–25 cm) & 5.685 \({}^{\mathrm{d}}\)\(\pm\) 0.080 & 0.561 \({}^{\mathrm{c}}\)\(\pm\) 0.004 & 10.1:1 & 6.8 \\  & E (25–45 cm) & 1.565 \({}^{\mathrm{a}}\)\(\pm\) 0.041 & 0.181 \({}^{\mathrm{a}}\)\(\pm\) 0.001 & 8.7:1 & 6.2 \\  & Bt (<45 cm) & 1.880 \({}^{\mathrm{b}}\)\(\pm\) 0.040 & 0.193 \({}^{\mathrm{a}}\)\(\pm\) 0.004 & 9.8:1 & 6.6 \\ \hline \multirow{4}{*}{Ca + M} & Ap (0–25 cm) & 10.625 \({}^{\mathrm{e}}\)\(\pm\) 0.319 & 0.959 \({}^{\mathrm{d}}\)\(\pm\) 0.029 & 11.1:1 & 6.7 \\  & E (25–45 cm) & 2.035 \({}^{\mathrm{b}}\)\(\pm\) 0.016 & 0.194 \({}^{\mathrm{a}}\)\(\pm\) 0.002 & 10.5:1 & 6.3 \\ \cline{1-1}  & Bt (<45 cm) & 2.930 \({}^{\mathrm{c}}\)\(\pm\) 0.099 & 0.261 \({}^{\mathrm{b}}\)\(\pm\) 0.011 & 11.3:1 & 6.4 \\ \hline \end{tabular} Mean value \(\pm\) standard deviation (SD). The means followed by different letters in the column are significantly different (\(p<0.05\)).  
\end{table} 
Table 1: The average (1 st and 2 nd year) content of the soil organic carbon (SOC), total nitrogen (TN) C:N ratio and soil pH. \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Treatment**} & \multirow{2}{*}{**Soil Horizons**} & \multicolumn{2}{c}{**1 st Year**} & \multicolumn{2}{c}{**2 nd Year**} \\ \cline{3-5}  & & **Spring** & **Autumn** & **Spring** & **Autumnumn{1}{c}{} \\ \hline \multirow{4}{*}{CaNPK} & Ap (0–25 cm) & 4.50 \({}^{\mathrm{a}}\)\(\pm\) 0.24 & 5.17 \({}^{\mathrm{b}}\)\(\pm\) 0.16 & 3.24 \({}^{\mathrm{a}}\)\(\pm\) 0.34 & 5.00 \({}^{\mathrm{ab}}\)\(\pm\) 0.84 \\  & E (26–45 cm) & 4.18 \({}^{\mathrm{a}}\)\(\pm\) 0.38 & 3.29 \({}^{\mathrm{a}}\)\(\pm\) 0.18 & 4.38 \({}^{\mathrm{a}}\)\(\pm\) 0.43 & 4.25 \({}^{\mathrm{a}}\)\(\pm\) 0.29 \\  & Bt (<45 cm) & 6.72 \({}^{\mathrm{b}}\)\(\pm\) 0.45 & 5.94 \({}^{\mathrm{b}}\)\(\pm\) 0.31 & 9.44 \({}^{\mathrm{c}}\)\(\pm\) 0.73 & 4.06 \({}^{\mathrm{a}}\)\(\pm\) 0.53 \\ \hline \multirow{4}{*}{Ca + M} & Ap (0–25 cm) & 5.88 \({}^{\mathrm{b}}\)\(\pm\) 0.58 & 16.81 \({}^{\mathrm{c}}\)\(\pm\) 0.60 & 6.89 \({}^{\mathrm{b}}\)\(\pm\) 0.04 & 6.58 \({}^{\mathrm{d}}\)\(\pm\) 0.49 \\  & E (26–45 cm) & 6.82 \({}^{\mathrm{b}}\)\(\pm\) 0.63 & 8.21 \({}^{\mathrm{c}}\)\(\pm\) 0.68 & 13.01 \({}^{\mathrm{d}}\)\(\pm\) 1.92 & 4.89 \({}^{\mathrm{ab}}\)\(\pm\) 0.32 \\ \cline{1-1}  & Bt (<45 cm) & 9.37 \({}^{\mathrm{c}}\)\(\pm\) 0.56 & 9.52 \({}^{\mathrm{d}}\)\(\pm\) 0.30 & 13.46 \({}^{\mathrm{d}}\)\(\pm\) 1.41 & 5.51 \({}^{\mathrm{c}}\)\(\pm\) 0.59 \\ \hline \end{tabular} Mean value \(\pm\) standard deviation (SD). The means followed by different letters in the column are significantly different (\(p<0.05\)).  
\end{table}