土层 | 地类 | 速效磷(mg/kg) | 速效钾(mg/kg) | 速效氮(mg/kg) | 土壤有机碳(g/kg) |
0~5 cm | 冰草 | 194.75 ± 0.57a | 35.58 ± 0.25c | 0.05 ± 0.00a | 21.39 ± 0.18a |
| 草木樨 | 189.20 ± 2.36a | 43.92 ± 0.39a | 0.05 ± 0.01a | 19.54 ± 0.23b |
| 苜蓿 | 182.21 ± 0.29a | 41.05 ± 0.28b | 0.04 ± 0.00a | 21.46 ± 1.19a |
| 裸地 | 138.50 ± 2.59b | 36.27 ± 1.80c | 0.04 ± 0.00a | 19.23 ± 0.04b |
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5~10 cm | 冰草 | 135.74 ± 0.28b | 27.41 ± 0.65c | 0.04 ± 0.00b | 21.33 ± 0.18ab |
| 草木樨 | 179.54 ± 0.32a | 30.67 ± 0.23b | 0.04 ± 0.00b | 21.13 ± 0.28b |
| 苜蓿 | 199.98 ± 2.99a | 33.91 ± 1.39a | 0.05 ± 0.00a | 19.42 ± 0.82c |
| 裸地 | 97.55 ± 2.61c | 29.15 ± 0.57bc | 0.04 ± 0.00b | 21.11 ± 0.18c |
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10~20 cm | 冰草 | 128.82 ± 2.94a | 25.75 ± 0.42b | 0.04 ± 0.00a | 22.86 ± 0.08a |
| 草木樨 | 123.39 ± 3.47ab | 22.61 ± 0.78c | 0.04 ± 0.00a | 23.41 ± 0.64a |
| 苜蓿 | 172.71 ± 2.35a | 27.95 ± 0.57a | 0.03 ± 0.02a | 22.30 ± 0.62a |
| 裸地 | 64.70 ± 4.32b | 22.66 ± 0.72c | 0.04 ± 0.00a | 22.71 ± 0.54a |