Table 3 Means and standard deviations of soil nutrient in different restoration years
From: Soil nutrient assessment based on attribute recognition model in the Loess Plateau of China
Restoration time | SOM(%) | Ntotal(%) | Ptotal(%) | Nhydro(mg/kg) | Pavail(mg/kg) | Kavail(mg/kg) |
|---|---|---|---|---|---|---|
25years | 7.33de(1.31) | 0.43de(0.07) | 0.54(0.07) | 29.3d(4.29) | 0.70c(0.16) | 64.9c(7.79) |
20years | 8.02cde(1.47) | 0.50cde(0.15) | 0.54(0.06) | 31.9cd(7.05) | 0.67c(0.10) | 66.0c(10.2) |
15years | 5.93e(0.24) | 0.36e(0.08) | 0.54(0.06) | 23.2d(2.68) | 0.72c(0.10) | 61.2c(17.2) |
10years | 5.53e(0.41) | 0.37e(0.07) | 0.54(0.04) | 23.3d(4.62) | 0.83bc(0.18) | 52.8c(20.5) |
5years | 6.62de(0.61) | 0.43de(0.10) | 0.53(0.03) | 26.8d(5.99) | 0.98bc(0.17) | 54.3c(27.4) |
0years | 6.87de(0.30) | 0.44de(0.22) | 0.57(0.05) | 26.5d(0.25) | 2.06a(0.43) | 60.2c(0.37) |
Sig. of ANOVA | 0.000 | 0.000 | 0.627 | 0.000 | 0.000 | 0.003 |