# Changes in Soil Moisture Improved by High-Performance Ester Materials under Dry-Wet Cycles
## 3 Results and Discussion
### Improvement on Soil Ecological Performance from High-Performance Ester Materials
From the above analysis, it can be seen that under dry-wet cycling conditions, both adhesive materials and water-retaining materials show an improvement effect on soil's moisture and EC. The fitting formula for moisture and EC show similarity, the soil moisture and EC are closely related, and the EC value is also affected by water holding capacity. In the equation of \(y_{1}\), the average value of R\({}^{2}\) corresponding to variable \(x\) is 0.97, and the average value of R\({}^{2}\) corresponding to added materials variable \(w\) and \(x\) is 0.84. In the formula of \(y_{2}\), the mean R\({}^{2}\) of variable \(x\) is 0.95, and the average value of R\({}^{2}\) corresponding to added materials variable \(w\) and \(x\) is 0.93. It can therefore be inferred that dry-wet cycles and the addition of materials both have a significant impact on soil's moisture and EC, but that the impact of dry-wet cycles is slightly greater. From the above test results and data analysis, it can be seen that under dry-wet cycling conditions, the polymer water-retaining materials and adhesive materials increase soil moisture and EC and improve soil ecological performance. Dry-wet cycles can damage the soil with a stable aggregate structure, decrease soil cohesion, and weaken water holding capacity, EC, and ecological performance. Polymer water-retaining materials can improve the soil's water holding capacity by absorbing water and expanding it. When the soil has sufficient water, the material absorbs water and expands, while when the soil lacks water, it releases water and contracts to supply water to plants, providing good water conditions for plant growth. The increase in water holding capacity also increases the soil's EC and enhances fertility. The polymer adhesive materials can enhance soil's structure stability, increase the number of clay particles in the soil, and create new physical and chemical connections between the soil particles. When the connection force between soil particles is enhanced, it results in an increase in the number of soil aggregates and an improvement in the soil particle structure. Therefore, adhesive materials can also enhance the soil's water holding capacity to a certain extent and improve the soil's EC. An optimal proportion for the quantity of high-performance ester materials was found. Water-retaining materials can greatly enhance the soil's water holding capacity and ecological performance through water absorption and expansion. Adhesive materials can enhance the viscosity of soil particles and the interaction between particles, improving the stability of the soil's structure. However, strong connection between particles may limit water absorption and the expansion of water-retaining materials and may reduce the porosity and permeability of the soil. Therefore, in practical ecological restoration applications, appropriate material ratios should be selected based on actual conditions and tests. According to our research, the optimum proportion of materials to improve soil moisture and soil ecological performance was test group 6, with the addition of 0.18% \begin{table}
\begin{tabular}{c c c c c} \hline
**Test Group** & \(\mathbf{y_{0}}\) & \(\mathbf{A_{1}}\) & \(\mathbf{t_{1}}\) & \(\mathbf{R^{2}}\) \\ \hline
0 & 237.24 & 140.37 & 5.04 & 0.96 \\ \hline
1 & 269.07 & 144.72 & 5.139 & 0.99 \\ \hline
2 & 288.99 & 148.89 & 5.54 & 0.93 \\ \hline
3 & 306.58 & 149.96 & 5.62 & 0.94 \\ \hline
4 & 295.45 & 148.81 & 5.38 & 0.94 \\ \hline
5 & 303.75 & 150.73 & 5.45 & 0.93 \\ \hline
6 & 323.44 & 153.9 & 5.56 & 0.95 \\ \hline
7 & 302.96 & 151.66 & 5.43 & 0.94 \\ \hline
8 & 314.91 & 153.7 & 5.5 & 0.95 \\ \hline
9 & 332.3 & 155.27 & 5.56 & 0.95 \\ \hline \end{tabular}
\end{table} 
Table 3: The formula fitting result of EC \(y_{2}\). polymer water-retaining material and 0.06% polymer adhesive material. This group had the highest water holding capacity, high EC, and the best plant growth situation. This study explored changes in soil moisture improved by high-performance ester materials under dry-wet cycles.