Sampling condition NH4+-N NO3-N NO2-N AN AK AP
(mg·kg–1) (mg·kg–1) (g·kg–1) (mg·kg–1) (mg·kg–1) (mg·kg–1)
Depth (cm) 0-20 7.18 ± 1.38Aa 4.27 ± 1.35Aa 1.26 ± 0.12Aa 99.25 ± 9.58Aa 5.04 ± 0.89Aa 1.80 ± 0.27Aa
20-40 4.76 ± 1.1ABab 2.62 ± 0.96Aa 1.13 ± 0.07Aab 81.20 ± 5.31ABab 4.62 ± 0.98Aa 0.60 ± 0.15Bb
40-60 3.124 ± 0.32Bb 3.08 ± 0.49Aa 0.95 ± 0.07Ab 74.39 ± 4.41Bb 4.11 ± 0.44Aa 0.45 ± 0.12Bb
Slope position Top 6.51 ± 1.20Aa 3.07 ± 0.54Aa 1.20 ± 0.11Aa 89.88 ± 7.26Aa 4.69 ± 0.66Aa 0.69 ± 0.13Aa
Midslope 3.99 ± 0.83Aa 4.79 ± 1.39Aa 1.19 ± 0.11Aa 84.99 ± 4.58Aa 4.87 ± 0.93Aa 1.05 ± 0.32Aa
Base 4.08 ± 0.82Aa 2.96 ± 0.36Aa 0.99 ± 0.09Aa 77.24 ± 7.72Aa 3.95 ± 0.60Aa 1.23 ± 0.30Aa
Forest type NA 6.46 ± 1.75Aab 2.76 ± 0.39Bb 1.27 ± 0.13Aa 90.33 ± 10.50Aa 7.53 ± 0.93Aa 0.25 ± 0.11Bb
GNA 2.23 ± 0.33Bc 1.82 ± 0.32Bb 1.25 ± 0.19Aa 84.46 ± 5.26Aab 2.72 ± 0.35Bb 0.84 ± 0.27ABab
LF 3.76 ± 0.82ABbc 7.39 ± 1.52Aa 0.95 ± 0.08Aa 65.59 ± 3.88Ab 3.51 ± 0.23Bb 1.25 ± 0.13ABa
GLF 6.98 ± 0.74Aa 2.41 ± 0.27Bb 1.18 ± 0.12Aa 92.45 ± 7.17Aa 4.06 ± 0.38Bb 1.56 ± 0.45Aa