3.2.1.1 One-way ANOVA of soil bacteria in H. rhamnoidesforests
To analyze whether the number of bacteria in the top ten rankings was affected significantly by different stands at the phylum level, we used one-way ANOVA to analyze the significance of five stands, specifically,H. rhamnoides pure forest (shady slope), H. rhamnoidespure forest (sunny slope), H. rhamnoides and Chinese arborvitae mixed forest, and H. rhamnoides and P. tabulaeformis mixed forest and grassland, as shown in Figure 1. From Figure 1, it can be seen that the top ten bacterial species in the soil community have the highest significance level of 0.9449 (Firmicutes) and the lowest value of 0.1188 (Chloroflexi) under different stands. There is no significant difference between different bacterial species under different stands.
To analyze whether different soil layers have a significant effect on the number of bacteria in the top ten rankings, we used one-way ANOVA to analyze the number of bacteria in the top ten rankings of soil bacterial community abundance in 0–10 cm, 10–20 cm, and 20–40 cm soil layers. The results are shown in Figure 2. As can be seen in the figure, there is a significant difference between Nitrospirae and Bacteroidetes at the level of 0.01, while GAL15 was significantly different at the level of 0.05. Comparing the one-way ANOVA under different stands reveals that the difference between different stands in the area studied was smaller than was that between different soil layers.