Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (9): 105-116.DOI: 10.11686/cyxb2020327
Li-tao TANG(), Rui MAO, Chang-ting WANG(), Jie LI, Lei HU, Hong-biao ZI
Received:
2020-07-07
Revised:
2020-11-02
Online:
2021-08-30
Published:
2021-08-30
Contact:
Chang-ting WANG
Li-tao TANG, Rui MAO, Chang-ting WANG, Jie LI, Lei HU, Hong-biao ZI. Effects of nitrogen and phosphorus addition on root characteristics of alpine meadow[J]. Acta Prataculturae Sinica, 2021, 30(9): 105-116.
项目Item | 0~10 cm | 10~20 cm |
---|---|---|
生产量Production | 6.31±1.40 | 5.50±0.83 |
死亡量Mortality | 7.27±1.03 | 5.06±0.61 |
现存量Standing root length | 30.36±3.77 | 25.06±2.13 |
Table 1 Survey of plant root biomass in alpine meadow (mm·cm-3)
项目Item | 0~10 cm | 10~20 cm |
---|---|---|
生产量Production | 6.31±1.40 | 5.50±0.83 |
死亡量Mortality | 7.27±1.03 | 5.06±0.61 |
现存量Standing root length | 30.36±3.77 | 25.06±2.13 |
项目 Item | 0~10 cm | 10~20 cm | ||||||
---|---|---|---|---|---|---|---|---|
CK | NP10 | NP20 | NP30 | CK | NP10 | NP20 | NP30 | |
土壤含水量Soil water content (SWC,%) | 30.21±0.72Aa | 26.22±0.23Bc | 26.11±0.06Bc | 28.25±0.76Bb | 31.35±1.13Aa | 30.12±0.60Aa | 29.38±0.45Aa | 31.92±0.38Aa |
土壤紧实度Soil compactness (SC,Pa) | 223.12±5.49Ba | 227.83±1.83Ba | 233.66±14.30Ba | 236.33±21.39Ba | 257.83±26.29Ab | 272.33±1.67Aa | 279.67±4.83Aa | 292.33±10.57Aa |
pH | 5.77±0.05Aa | 5.61±0.03Aa | 5.62±0.07Aa | 5.70±0.02Aa | 5.73±0.04Aa | 5.50±0.07Ab | 5.33±0.03Bb | 5.38±0.06Ab |
土壤有机碳Soil organic carbon (SOC,g·kg-1) | 64.34±3.57Aa | 69.32±3.24Aa | 73.48±2.98Aa | 74.83±2.77Aa | 54.87±4.01Aa | 53.20±3.66Ba | 49.83±2.78Ba | 50.24±3.34Ba |
全氮Total N (TN,g·kg-1) | 6.38±0.43Aa | 6.92±0.49Aa | 7.34±0.33Aa | 7.41±0.73Aa | 5.34±0.36Aa | 5.61±0.25Aa | 5.08±0.52Aa | 5.10±0.57Aa |
速效氮Available N (AN,mg·kg-1) | 343.36±4.23Ab | 359.73±5.34Ab | 380.35±7.23Aa | 394.45±8.24Aa | 290.33±4.44Ba | 230.30±6.77Bb | 271.95±5.57Ba | 286.65±4.72Ba |
全磷Total P (TP,g·kg-1) | 0.73±0.05Ac | 0.88±0.05Ac | 2.22±0.18Aa | 1.03±0.09Ab | 0.93±0.07Aa | 0.82±0.05Aa | 0.88±0.06Ba | 0.80±0.04Aa |
速效磷Available P (AP,mg·kg-1) | 5.40±0.47Ab | 5.50±0.29Ab | 10.20±0.71Aa | 7.20±0.34Aa | 5.35±0.57Aa | 3.60±0.47Aab | 3.05±0.69Bb | 4.30±0.85Bab |
碳氮比C∶N | 10.35±1.48Aa | 10.24±1.35Aa | 10.21±1.26Aa | 10.29±1.26Aa | 10.66±1.81Aa | 9.81±1.63Aa | 10.22±1.85Aa | 10.27±1.85Aa |
碳磷比C∶P | 88.67±2.45Aa | 78.92±1.38Ab | 33.12±0.64Bd | 72.54±0.81Ac | 65.09±0.50Ba | 59.16±0.07Bb | 56.55±0.09Ab | 62.61±0.33Bb |
氮磷比N∶P | 8.99±1.52Aa | 8.01±1.18Aa | 8.33±0.34Aa | 7.28±0.97Aa | 5.88±0.99Aa | 7.02±1.20Aa | 5.91±1.05Aa | 6.52±0.19Aa |
Table 2 Effect of nitrogen and phosphorus addition on soil nutrients of alpine meadow (mean±SE)
项目 Item | 0~10 cm | 10~20 cm | ||||||
---|---|---|---|---|---|---|---|---|
CK | NP10 | NP20 | NP30 | CK | NP10 | NP20 | NP30 | |
土壤含水量Soil water content (SWC,%) | 30.21±0.72Aa | 26.22±0.23Bc | 26.11±0.06Bc | 28.25±0.76Bb | 31.35±1.13Aa | 30.12±0.60Aa | 29.38±0.45Aa | 31.92±0.38Aa |
土壤紧实度Soil compactness (SC,Pa) | 223.12±5.49Ba | 227.83±1.83Ba | 233.66±14.30Ba | 236.33±21.39Ba | 257.83±26.29Ab | 272.33±1.67Aa | 279.67±4.83Aa | 292.33±10.57Aa |
pH | 5.77±0.05Aa | 5.61±0.03Aa | 5.62±0.07Aa | 5.70±0.02Aa | 5.73±0.04Aa | 5.50±0.07Ab | 5.33±0.03Bb | 5.38±0.06Ab |
土壤有机碳Soil organic carbon (SOC,g·kg-1) | 64.34±3.57Aa | 69.32±3.24Aa | 73.48±2.98Aa | 74.83±2.77Aa | 54.87±4.01Aa | 53.20±3.66Ba | 49.83±2.78Ba | 50.24±3.34Ba |
全氮Total N (TN,g·kg-1) | 6.38±0.43Aa | 6.92±0.49Aa | 7.34±0.33Aa | 7.41±0.73Aa | 5.34±0.36Aa | 5.61±0.25Aa | 5.08±0.52Aa | 5.10±0.57Aa |
速效氮Available N (AN,mg·kg-1) | 343.36±4.23Ab | 359.73±5.34Ab | 380.35±7.23Aa | 394.45±8.24Aa | 290.33±4.44Ba | 230.30±6.77Bb | 271.95±5.57Ba | 286.65±4.72Ba |
全磷Total P (TP,g·kg-1) | 0.73±0.05Ac | 0.88±0.05Ac | 2.22±0.18Aa | 1.03±0.09Ab | 0.93±0.07Aa | 0.82±0.05Aa | 0.88±0.06Ba | 0.80±0.04Aa |
速效磷Available P (AP,mg·kg-1) | 5.40±0.47Ab | 5.50±0.29Ab | 10.20±0.71Aa | 7.20±0.34Aa | 5.35±0.57Aa | 3.60±0.47Aab | 3.05±0.69Bb | 4.30±0.85Bab |
碳氮比C∶N | 10.35±1.48Aa | 10.24±1.35Aa | 10.21±1.26Aa | 10.29±1.26Aa | 10.66±1.81Aa | 9.81±1.63Aa | 10.22±1.85Aa | 10.27±1.85Aa |
碳磷比C∶P | 88.67±2.45Aa | 78.92±1.38Ab | 33.12±0.64Bd | 72.54±0.81Ac | 65.09±0.50Ba | 59.16±0.07Bb | 56.55±0.09Ab | 62.61±0.33Bb |
氮磷比N∶P | 8.99±1.52Aa | 8.01±1.18Aa | 8.33±0.34Aa | 7.28±0.97Aa | 5.88±0.99Aa | 7.02±1.20Aa | 5.91±1.05Aa | 6.52±0.19Aa |
因子 Factor | df | 现存量Standing root length | 死亡量Mortality | 生产量Production | |||
---|---|---|---|---|---|---|---|
F | P | F | P | F | P | ||
处理Treatment | 3 | 44.44 | <0.01 | 18.89 | <0.01 | 7.38 | <0.01 |
深度Depth | 1 | 59.82 | <0.01 | 39.89 | <0.01 | 25.07 | <0.01 |
处理×深度Treatment×depth | 3 | 0.94 | 0.49 | 1.75 | 0.15 | 2.30 | 0.07 |
Table 3 Two-way ANOVA of root characteristics of different nitrogen and phosphorus addition gradients and soil depths
因子 Factor | df | 现存量Standing root length | 死亡量Mortality | 生产量Production | |||
---|---|---|---|---|---|---|---|
F | P | F | P | F | P | ||
处理Treatment | 3 | 44.44 | <0.01 | 18.89 | <0.01 | 7.38 | <0.01 |
深度Depth | 1 | 59.82 | <0.01 | 39.89 | <0.01 | 25.07 | <0.01 |
处理×深度Treatment×depth | 3 | 0.94 | 0.49 | 1.75 | 0.15 | 2.30 | 0.07 |
项目 Item | 现存量 Standing crop | 死亡量 Mortality | 生产量 Production |
---|---|---|---|
土壤含水量SWC | -0.253 | -0.240 | -0.328 |
土壤紧实度SC | 0.443* | 0.606** | 0.441* |
pH | 0.224 | 0.228 | 0.200 |
土壤有机碳SOC | 0.544** | 0.522** | 0.498* |
全氮TN | 0.325 | 0.473* | 0.233 |
速效氮AN | 0.643** | 0.705** | 0.442* |
全磷TP | 0.430* | 0.140 | 0.040 |
速效磷AP | 0.549** | 0.366 | 0.620** |
C∶N | 0.090 | -0.020 | 0.155 |
C∶P | -0.172 | 0.175 | 0.237 |
N∶P | -0.239 | 0.091 | 0.032 |
Table 4 Pearson correlation analysis between soil physicochemical properties and root characteristics
项目 Item | 现存量 Standing crop | 死亡量 Mortality | 生产量 Production |
---|---|---|---|
土壤含水量SWC | -0.253 | -0.240 | -0.328 |
土壤紧实度SC | 0.443* | 0.606** | 0.441* |
pH | 0.224 | 0.228 | 0.200 |
土壤有机碳SOC | 0.544** | 0.522** | 0.498* |
全氮TN | 0.325 | 0.473* | 0.233 |
速效氮AN | 0.643** | 0.705** | 0.442* |
全磷TP | 0.430* | 0.140 | 0.040 |
速效磷AP | 0.549** | 0.366 | 0.620** |
C∶N | 0.090 | -0.020 | 0.155 |
C∶P | -0.172 | 0.175 | 0.237 |
N∶P | -0.239 | 0.091 | 0.032 |
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