Soil Quality Assessment and Management in Karst Rocky Desertification Ecosystem of Southwest China

Karst rocky desertification is a common phenomenon in terrestrial ecosystems, and the deterioration of soil quality has serious side effect on aboveground vegetation underground environmental factors. To clarify variety different grades typical karst areas southwest China, four was calculated by single model (SQI: index), two screening processes (TDS: total dataset MDS: minimum dataset) three scoring methods (SSF: standard function, SL: linear function SNL: nonlinear function). The key results are as follows: Significant differences were found environment factors non-rocky (NRD), light (LRD) moderate (MRD) compared to intense (IRD) (p < 0.01). Except for potassium (TK), manganese (Mn) amylase, other showed U-shaped changes. In contrast, TK, Mn amylase increased first then decreased. Additionally, SQI based MDS SSF, SL SNL IRD (0.58) > NRD (0.48) LRD (0.45) MRD (0.43), (0.53) (0.42) (0.39) (0.36) (0.57) (0.47) (0.40), respectively. However, always trend TDS. Overall, although area scarce, edaphic properties, enzyme activities not poor IRD. Furthermore, we that more suitable evaluation (R2 = 0.63, p 0.001 coefficient variation 30.69%). This research helps properties during succession provides guidelines sustainable management China.