## 3 Results
### Effects of Different Treatments on Contents of Soil Organic Carbon and Humans Components
#### 3.2.2 Effects of Different Treatments on the Content of Soil Humans Components  
The impact of adding straw to livestock and poultry manure on the humus components is illustrated in Table 4. Humin content exhibited the highest levels, followed by humic acid and fulvic acid content, with water-soluble substances showing the lowest  
Figure 3: The effect of different treatments on SOC content in different periods. Note: T1: corn stalk; T2: Corn stalk + chicken manure; T3: Corn stalk + cow manure; T4: corn straw + maturing agent. Lowercase and different letters indicate statistically significant differences at \(p<0.05\) between treatments. \begin{table}
\begin{tabular}{c c c c c c} \hline
**Treatment** & **WSS (g/kg)** & **HLA (g/kg)** & **FLA (g/kg)** & **HML (g/kg)** & **PQ (\%)** \\ \hline T1 & 25.92 \(\pm\) 0.05 b & 29.30 \(\pm\) 0.27 c & 28.22 \(\pm\) 0.84 a & 179.53 \(\pm\) 2.91 a & 50.93 \(\pm\) 0.10 c \\ T2 & 34.16 \(\pm\) 0.64 a & 36.30 \(\pm\) 0.67 a & 31.41 \(\pm\) 2.11 a & 143.06 \(\pm\) 2.62 c & 53.61 \(\pm\) 0.34 a \\ T3 & 33.27 \(\pm\) 0.89 a & 35.42 \(\pm\) 0.55 a & 30.68 \(\pm\) 1.29 a & 148.86 \(\pm\) 0.62 c & 53.58 \(\pm\) 0.21 a \\ T4 & 27.59 \(\pm\) 0.29 b & 32.01 \(\pm\) 0.81 b & 29.17 \(\pm\) 1.17 a & 165.01 \(\pm\) 1.31 b & 52.32 \(\pm\) 0.11 b \\ \hline \end{tabular} Note: T1: corn stalk; T2: Corn stalk + chicken manure; T3: Corn stalk + cow manure; T4: corn straw + maturing agent. WSS: water-soluble substances; HML: humin-like; HLA: humic-like acid; FLA: fulvic-like acids. Lowercase and different letters indicate statistically significant differences at \(p<0.05\) between treatments.  
\end{table} 
Table 3: Effects of different treatments on humus like components in residual straw. levels. When compared to the T1 treatment, the soil treated with T2, T3, and T4 showed a significant increase in water-soluble substances by 33.82%, 28.71%, and 14.60%, respectively. Furthermore, compared to the T1 treatment, the soil humic acid and fulvic acid carbon content in T2 increased significantly by 30.70% and 9.19%, while in T3 treatment, they increased by 28.85% and 6.51%. Additionally, the humin content in the soil under T2, T3, and T4 treatments was notably higher than in the T1 treatment. However, when compared to the T4 treatment, the soil under T2 and T3 treatments showed a significant increase in water-soluble substances, humic acid, and fulvic acid content, with T2 treatment showing increases of 16.77%, 24.85%, and 11.14% and T3 treatment showing increases of 12.31%, 23.09%, and 8.41%. There was no significant difference in soil humic acid carbon content between T2 and T3 treatments compared to T4 treatment. The soil humus PQ value, which is the ratio of humic acid (HA) to extractable replicable substance (HE), serves as an indicator of the huminification degree of soil organic matter. In comparison to T1 treatment, the PQ values of soil humus in T2 and T3 treatments saw a significant increase of 6.44% and 6.81%, respectively. Furthermore, the PQ value of soil humus in T2 and T3 treatments was notably higher than that in T4 treatment, with increases of 4.03% and 4.39% compared to T4 treatment, respectively. Conversely, there was no significant difference in soil humus PQ between T4 treatment and T1 treatment. These results suggest that the application of straw and livestock manure strip treatments can enhance the PQ value of soil humus, while the impact of bactericide treatment is less pronounced. The complexity of soil humus structure is typically evaluated based on the \(\Delta\)logK value (hue coefficient), where a larger \(\Delta\)logK value indicates a simpler structure and a lower value signifies a more complex structure. When compared to T1 treatment, the \(\Delta\)logK values of soil humic acid and fulvic acid in T2 and T3 treatments exhibited significant increases, with humic acid values rising by 9.70% and 8.26%, and fulvic acid values increasing by 7.66% and 7.19%, respectively.