# Optimization of Technological Parameters of Straw Fiber-Based Plant Fiber Seeding Pot Raw Materials
## 3 Results and Discussion
### Influences of Factors on Dry Tensile Index
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{1}{c}{**Source**} & \multicolumn{1}{c}{**Sum of Squares**} & \multicolumn{1}{c}{**DF**} & \multicolumn{1}{c}{**Mean Square**} & \multicolumn{1}{c}{**F Value**} & \multicolumn{1}{c}{\(p\) Value**} \\ \hline Dry tensile & model & 1654.37 & 14 & 118.17 & 190.17 & \textless{}0.0001 ** \\ index & \(X_{1}\) & 1253.23 & 1 & 1253.23 & 2016.82 & \textless{}0.0001 ** \\  & \(X_{2}\) & 0.02 & 1 & 0.02 & 0.03 & 0.8608 \\  & \(X_{3}\) & 6.26 & 1 & 6.26 & 10.07 & 0.0046 ** \\  & \(X_{4}\) & 6.63 & 1 & 6.63 & 10.66 & 0.0037 ** \\  & \(X_{1}{}^{2}\) & 111.29 & 1 & 111.29 & 179.10 & \textless{}0.0001 \\  & \(X_{2}{}^{2}\) & 179.51 & 1 & 179.51 & 288.88 & \textless{}0.0001 \\  & \(X_{2}{}^{2}\) & 40.54 & 1 & 40.54 & 65.25 & \textless{}0.0001 \\  & \(X_{4}{}^{2}\) & 37.51 & 1 & 37.51 & 60.37 & \textless{}0.0001 \\  & \(X_{1}{}X_{2}\) & 0.43 & 1 & 0.43 & 0.70 & 0.4122 \\  & \(X_{1}{}X_{3}\) & 10.36 & 1 & 0.36 & 16.68 & 0.0005 ** \\  & \(X_{1}{}X_{4}\) & 0.66 & 1 & 0.66 & 1.06 & 0.3147 \\  & \(X_{2}{}X_{3}\) & 4.04 & 1 & 4.04 & 6.50 & 0.0187 * \\  & \(X_{2}{}X_{4}\) & 2.39 & 1 & 2.39 & 3.84 & 0.0634 \\  & \(X_{3}{}X_{4}\) & 1.50 & 1 & 1.50 & 2.41 & 0.1355 \\  & Residual & 13.0491 & 21 & 0.62 & & \\  & Lack of Fit & 7.6490 & 10 & 0.76 & 1.56 & 0.2387 \\  & Pure Error & 5.4001 & 11 & 0.49 & & \\  & Cor Total & 1667.4151 & 35 & & & \\ \hline \hline \end{tabular}  
* Notes: ** represents highly significant (\(p<0.01\)), and ** represents significant (\(p<0.05\)).  
\end{table} 
Table 3: Variance analysis of regression model of dry tensile index. under a certain quantitative condition. As the binding force between the filaments of the unbleached sulfate conifer pulp fiber was stronger than that between the filaments of wheat straw fiber, the quality of the unbleached sulfate conifer pulp fiber decreased, which reduced the overall binding force of the fiber. The 3D response surface between beating degree of wheat straw fiber and wheat straw fiber quality percentage content on the dry tensile index is shown in Figure 1b. The dry tensile index decreased with the increase in wheat straw fiber quality percentage content, which was caused by the decrease in the content of unbleached sulfate conifer pulp fiber. The dry tensile index was lower when the beating degree of wheat straw fiber was at a medium level. The reason was that when the beating degree of wheat straw fiber was in the middle level, the properties of processed fiber were weakened, the number of fine fibers was increased, and the fiber bonding strength was reduced. With the further improvement in beating degree of wheat straw fiber, when beating degree of the wheat straw fiber was at a high level, the dry tensile index increased. The reason was that the processed fine fibers ran away with water through the filter screen at that time, and the aspect ratio of remaining fibers increased, which improved the overall bonding force of the fibers; or the number of fibers separated from the fiber bundles increased, and the degree of fiber splitting increased; or the fiber bundles were further cut off, so that the exposed number of fiber bundle cross-sections increased, and the number of fibers brushed at the cross-sections increased, which further increased the bonding force between the fibers.