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.