## 3 Results  
It appeared that the highest accumulated NH\({}_{4}\)-N concentration was 371.6 mg L\({}^{-1}\) in the HNPK, but it was almost the same between the HTN and the TNPK during the final precipitation period (Figure 1). The highest accumulated NO\({}_{3}\)-N concentration was 101.0 mg L\({}^{-1}\) in the HTN throughout the experimental period, but results did not differ significantly (\(p>0.05\)) among the other treatments within Phase I. The order of highest NO\({}_{3}\)-N release in phase II was HTN\(>\)TNPK\(>\)HTNPK\(>\)TN\(>\)PMCP. Figure 1: Releasing curves of NH\({}_{4}\)-N and NO\({}_{3}\)-N from different blended biochar pellets uploaded with plant nutrient solutions. The results are the mean of triplicate samples. Error bars indicate the standard deviation. The required times of 1/2 maximum accumulated NH\({}_{4}\)-N and NO\({}_{3}\)-N levels were taken during 6.7 and 3.5 days in the TNPK, respectively (Tables 3 and 4). The model was significantly fitted (\(p<0.01\)) and correlated with the \(R^{2}\) values between the observed and estimated values. The accumulated PO\({}_{4}\)-P concentration in precipitation water from the different treatments is shown in Figure 2. The lowest accumulated PO\({}_{4}\)-P concentration in the PMCP was 423.2 mg L\({}^{-1}\) from 10 days through 55 days of the precipitation (phase II), with a rapid increase occurring between 55 and 77 days of precipitation. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Treatments \({}^{*}\)**} & \multicolumn{4}{c}{**Model Parameters**} & \multicolumn{4}{c}{**Analysis of Variance**} & \multirow{2}{*}{**R\({}^{2}\)**} \\ \cline{2-2} \cline{5-6}  & **Amax** & \(p\)**-Values** & & & & \\ \hline TN & 95.0 & \(<\)0.0001 & 3.2 & \(<\)0.0001 & 136.5 & \(<\)0.0001 & 0.724 \\ HTN & 102.1 & \(<\)0.0001 & 2.6 & \(<\)0.0001 & 127.5 & \(<\)0.0001 & 0.710 \\ TNPK & 101.1 & \(<\)0.0001 & 3.5 & \(<\)0.0001 & 202.0 & \(<\)0.0001 & 0.795 \\ HTNPK & 97.7 & \(<\)0.0001 & 3.5 & \(<\)0.0001 & 161.5 & \(<\)0.0001 & 0.756 \\ PMCP & 92.5 & \(<\)0.0001 & 3.3 & \(<\)0.0001 & 111.5 & \(<\)0.0001 & 0.682 \\ \hline \hline \multicolumn{6}{l}{\({}^{*}\)TN, uploaded with urea solution at room temperature, HTN; urea solution heated to 60 \({}^{\circ}\)C, TNPK; N, P and K solutions at room temperature, HTNPK; N, P and K solutions heated to 60 \({}^{\circ}\)C and PMCP; control as pig manure compost pellet. Means values indicate significant differences (\(p<0.001\)) among treatments (ANOVA).} \\ \end{tabular}
\end{table} 
Table 4: Estimation model for NO\({}_{3}\)-N release from different types of the blended biochar pellet. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Treatments \({}^{*}\)**} & \multicolumn{4}{c}{**Model Parameters**} & \multicolumn{4}{c}{**Analysis of Variance**} & \multirow{2}{*}{**R\({}^{2}\)**} \\ \cline{2-2} \cline{5-6}  & **Amax** & \(p\)**-Values** & & & & \\ \hline TN & 343.1 & \(<\)0.0001 & 10.0 & \(<\)0.0001 & 566.7 & \(<\)0.0001 & 0.916 \\ HTN & 345.2 & \(<\)0.0001 & 6.9 & \(<\)0.0001 & 348.1 & \(<\)0.0001 & 0.870 \\ TNPK & 342.7 & \(<\)0.0001 & 6.7 & \(<\)0.0001 & 405.2 & \(<\)0.0001 & 0.886 \\ HTNPK & 374.6 & \(<\)0.0001 & 5.1 & \(<\)0.0001 & 266.0 & \(<\)0.0001 & 0.837 \\ PMCP & 446.9 & \(<\)0.0001 & 39.4 & \(<\)0.0001 & 1962.5 & \(<\)0.0001 & 0.974 \\ \hline \hline \multicolumn{6}{l}{\({}^{*}\)TN, uploaded with urea solution at room temperature, HTN; urea solution heated to 60 \({}^{\circ}\)C, TNPK; N, P and K solutions at room temperature, HTNPK; N, P and K solutions heated to 60 \({}^{\circ}\)C and PMCP; tip manure compost pellet as control. Means values indicate significant differences (\(p<0.001\)) among treatments (ANOVA).} \\ \end{tabular}
\end{table} 
Table 3: Estimation model for NH\({}_{4}\)-N release from different types of the blended biochar pellet. Figure 2: Releasing curves of PO\({}_{4}\)-P from the blended biochar pellet uploaded with different plant nutrient solutions. Results are the mean of triplicate samples. Error bars indicate standard deviation.