Seasonal and Long-Term Variability in Soil Structure and Erodibility under Different Land-Use Patterns in the Mollisols Region of Northeast China

Soil structure and its change are good indicators for soil quality environmental stability, land-use is known to be an important factor that affects structure. We investigated the seasonal temporal variability in evaluated erodibility under different land-management practices Mollisols region of Northeast China. considered five modes sloping land (5°), i.e., bare (BL), natural vegetation restoration (NVR), artificial forest (AF), no-tillage (NT), conventional tillage (CT). The bulk density (BD), aggregate size distribution, stability (AS) were determined each mode. Meanwhile, we estimated runoff depth (RD) sediment yield (SY) assess erodibility. lowest BD CT occurred May, but no was observed other treatments. After 15 years, NVR had increased values, while NT declined significantly over time. >2 mm fractions AS NVR, NT, largest August, those BL decreased during growing season. Furthermore, BL, long-term study period, AF exhibited significant inter-annual changes AS. greater than BL. not different, a subsurface topsoil CT. Moreover, reduced RD SY compared with These results provide scientific basis choosing sustainable agriculture development control erosion