3.1.3 Relationship between the stability of soil aggregates and the content of GRSP content under N addition conditions
In the present study, Korean pine plantation soils were dominated by medium aggregates (1-2 mm) with MWD values ranging from 1.48 to 1.74 mm, which have been identified as an indicator of soil stability, and long-term (7 years) HN treatment (80 kg N ha-1year-1) increased the soil macro-aggregates content and thus improved soil stability. Pearson correlation analysis of undisturbed soil GRSP content and MWD showed that both EE-GRSP and T-GRSP were significantly positively correlated with MWD values (P <0.01) (Fig. 3).