Figure 2. The effect of different P application methods on phosphorus mobility and availability.

Data are presented as mean ± standard deviation (SD) of three replicates at a significance level of p < 0.05. The three lines represent MAP, PA and APP, respectively. The left column represents loam soil; the right column represents clay soil. Vertical bars represent standard deviation of the mean (n = 3). The black line with circle represents CK, the red line with square frame represents single P fertilization and the blue line with triangle represents fertilizers repeated application treatment.