highly significantp < 0.001
For soil pH, the main effects of both PE-MPs and TSB were highly significant ( p < 0.001), while their interaction was not significant ( p = 0.213).
For soil pH, the main effects of both PE-MPs and TSB were highly significant ( p < 0.001), while their interaction was not significant ( p = 0.213).
Conversely, at the same TSB level, the soil pH exhibited a decreasing trend with an increasing PE-MPs concentration (from M0 to M3).