3.1 Soil physicochemical properties
The physical and chemical properties of soil with different oil
pollution duration showed significant differences (Fig. 1 ). The
results showed that compared with the control, the contents of TPH, TC,
TN, TS, and TP in soil were increased by oil pollution (one-way ANOVA, p
<0.05), and the soil pH was significantly reduced. For soil
electric conductivity, short-term contaminated soil is significantly
lower than long-term oil-contaminated soil. In addition, the soil
scanning electron microscope photos show that (Fig. S2 ) after
the soil is polluted by oil, the soil is more likely to form a large
block structure. At the same time, the uncontaminated soil is not only
looser but also has a porous surface.