Figure 1.
Distribution map of soil sample points (0–20 cm) in Matiyu small watershed.
Figure 2.
Flowchart of regression-kriging.
Table 1.
Statistical results of mean concentrations of SOC and STN in Matiyu small watershed†.
Table 2.
Correlation analysis of SOC and STN with the environmental factors.
Figure 3.
Semi-variogram analysis of SOC and STN for regression-kriging (a, b) and ordinary kriging (c, d).
Table 3.
Semi-variogram analysis of SOC and STN and its parameters.
Figure 4.
Distribution map of SOC and STN concentrations by regression-kriging (a, b) and ordinary kriging (c, d) in Matiyu small watershed.
Figure 5.
Maps of Prediction Standard Error of SOC and STN by regression-kriging (a, b) and ordinary kriging (c, d) in Matiyu small watershed.
Table 4.
Comparison of prediction accuracy between regression-kriging and ordinary kriging.
Figure 6.
Regression equations of SOC and STN in Matiyu small watershed.
Table 5.
Changes of SOC and STN concentrations from different land use types*.
Table 6.
Changes of SOC and STN concentrations at different elevations*.
Table 7.
Changes of SOC and STN concentrations from different aspects*.