The Influence of Harbin Forest–River Ecological Corridor Construction on the Restoration of Mollisols in Cold Regions of China

Artificial ecological corridors (AECs) are internationally approved restoration and climate mitigation strategies. The width recovery time indices of AECs directly affect the efficiency degraded soil nutrients. However, there is a lack comprehensive quantitative evaluation research on construction factors from perspective fertility improvement. This aimed to examine critical corridor affecting Mollisols’ eco-chemometrics give scientific scope. We collected 55 Mollisol samples at different years (0–35 years) distances (0–280 m) AEC Ashi River, typical area in Harbin, cold regions China. measured distances, years, thickness, pH, electrical conductivity (EC), cation exchange capacity (CEC), total organic carbon (SOC), matter (SOM), dry content (DMC), proportion nitrogen (TN), phosphorus (TP) potassium (TK). results as follows: (1) Within AEC, were significant differences stoichiometric characteristics locations; after for 10–35 reach or exceed reference value Mollisols. (2) It feasible restore large-scale Mollisols through corridors. In this process, nutrients first decreased, then increased, finally reached exceeded normal (3) Soil nutrient accumulation was related time. recommended unilateral based CEC SOC 175–225 m, period 22.7–35 EC restoration. study demonstrated change mechanism location, provided basis Chinese government formulate policies remediation.