an increasing trendp < 0.001
In addition, the C:N ratio in the SC group displayed an increasing trend in both the 0–20 cm and 20–40 cm layers, with a growth rate of 13.84% in the 20–40 cm soil layer ( p < 0.001).
In addition, the C:N ratio in the SC group displayed an increasing trend in both the 0–20 cm and 20–40 cm layers, with a growth rate of 13.84% in the 20–40 cm soil layer ( p < 0.001).