Fig. 1

Effect of RSD treatment on the physicochemical properties of soil. (a) Soil organic matter (SOC), (b) Alkaline hydrolyzed nitrogen (AN), (c) Available phosphorus (AP), (d) available potassium (AK), and (e) pH. Data are presented as the mean ± standard error (n = 3), with significant differences indicated by different letters in the same column at P < 0.05