Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (9): 50-62.DOI: 10.11686/cyxb2021496
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Guo-hong YOU(), Dan LIU, Yan-li WANG, Chang-ting WANG()
Received:
2021-12-28
Revised:
2022-03-09
Online:
2022-09-20
Published:
2022-08-12
Contact:
Chang-ting WANG
Guo-hong YOU, Dan LIU, Yan-li WANG, Chang-ting WANG. Response of plant leaf ecological stoichiometric characteristics to long-term nitrogen addition in alpine meadow[J]. Acta Prataculturae Sinica, 2022, 31(9): 50-62.
土层 Soil layer (cm) | 处理 Treatment | 全碳 Total carbon (TC, g·kg-1) | 全氮 Total nitrogen (TN, g·kg-1) | 全磷 Total phosphorus (TP, g·kg-1) | 碳氮比 Carbon nitrogen ratio (C/N) | 氮磷比 Nitrogen phosphorus ratio (N/P) | 碳磷比 Carbon phosphorus ratio (C/P) | 土壤含水量 Soil moisture content (SMC, %) | 土壤紧实度 Soil compactness (SC, Pa) |
---|---|---|---|---|---|---|---|---|---|
0~10 | CK | 62.76±1.45Ab | 5.59±0.16Ab | 1.13±0.03Aa | 11.22±0.08Aab | 4.94±0.25Ab | 55.44±2.37Ab | 36.04±1.49Aa | 207.33±6.57Aa |
N10 | 74.41±2.16Aa | 6.57±0.18Aa | 0.89±0.02Bc | 11.78±0.47Aa | 7.13±0.32Aa | 84.04±7.53Aa | 28.26±1.12Abc | 200.00±5.57Aa | |
N20 | 61.24±1.62Ab | 5.75±0.16Ab | 1.13±0.02Aa | 10.68±0.90Aab | 5.10±0.13Ab | 54.34±3.97Ab | 31.61±0.16Ab | 209.00±10.79Aa | |
N30 | 63.61±1.75Ab | 6.32±0.16Aab | 1.00±0.01Bb | 9.69±0.38Ab | 6.58±0.12Aa | 63.70±2.39Ab | 27.18±0.56Ac | 198.33±18.99Aa | |
10~20 | CK | 51.10±1.53Ba | 5.08±0.15Ba | 1.14±0.03Aa | 10.09±0.26Aa | 4.47±0.15Ba | 45.15±2.58Ba | 35.55±1.03Aa | 170.33±6.17Ab |
N10 | 53.45±1.48Ba | 4.52±0.21Bb | 1.06±0.05Aa | 11.83±0.01Aa | 4.26±0.17Ba | 50.28±0.11Ba | 29.29±0.69Ab | 192.30±2.16Aa | |
N20 | 55.26±0.66Ba | 5.14±0.26Ba | 1.16±0.01Aa | 10.76±0.04Aa | 4.45±0.10Ba | 47.82±0.72Ba | 34.15±0.41Aa | 193.20±2.69Aa | |
N30 | 52.26±0.86Ba | 4.86±0.14Bab | 1.12±0.01Aa | 10.75±0.10Aa | 4.34±0.06Ba | 46.63±0.98Ba | 28.40±0.53Ab | 172.13±1.85Ab |
Table 1 Soil physiochemical characteristics under different N addition gradients
土层 Soil layer (cm) | 处理 Treatment | 全碳 Total carbon (TC, g·kg-1) | 全氮 Total nitrogen (TN, g·kg-1) | 全磷 Total phosphorus (TP, g·kg-1) | 碳氮比 Carbon nitrogen ratio (C/N) | 氮磷比 Nitrogen phosphorus ratio (N/P) | 碳磷比 Carbon phosphorus ratio (C/P) | 土壤含水量 Soil moisture content (SMC, %) | 土壤紧实度 Soil compactness (SC, Pa) |
---|---|---|---|---|---|---|---|---|---|
0~10 | CK | 62.76±1.45Ab | 5.59±0.16Ab | 1.13±0.03Aa | 11.22±0.08Aab | 4.94±0.25Ab | 55.44±2.37Ab | 36.04±1.49Aa | 207.33±6.57Aa |
N10 | 74.41±2.16Aa | 6.57±0.18Aa | 0.89±0.02Bc | 11.78±0.47Aa | 7.13±0.32Aa | 84.04±7.53Aa | 28.26±1.12Abc | 200.00±5.57Aa | |
N20 | 61.24±1.62Ab | 5.75±0.16Ab | 1.13±0.02Aa | 10.68±0.90Aab | 5.10±0.13Ab | 54.34±3.97Ab | 31.61±0.16Ab | 209.00±10.79Aa | |
N30 | 63.61±1.75Ab | 6.32±0.16Aab | 1.00±0.01Bb | 9.69±0.38Ab | 6.58±0.12Aa | 63.70±2.39Ab | 27.18±0.56Ac | 198.33±18.99Aa | |
10~20 | CK | 51.10±1.53Ba | 5.08±0.15Ba | 1.14±0.03Aa | 10.09±0.26Aa | 4.47±0.15Ba | 45.15±2.58Ba | 35.55±1.03Aa | 170.33±6.17Ab |
N10 | 53.45±1.48Ba | 4.52±0.21Bb | 1.06±0.05Aa | 11.83±0.01Aa | 4.26±0.17Ba | 50.28±0.11Ba | 29.29±0.69Ab | 192.30±2.16Aa | |
N20 | 55.26±0.66Ba | 5.14±0.26Ba | 1.16±0.01Aa | 10.76±0.04Aa | 4.45±0.10Ba | 47.82±0.72Ba | 34.15±0.41Aa | 193.20±2.69Aa | |
N30 | 52.26±0.86Ba | 4.86±0.14Bab | 1.12±0.01Aa | 10.75±0.10Aa | 4.34±0.06Ba | 46.63±0.98Ba | 28.40±0.53Ab | 172.13±1.85Ab |
指标Indicator | 叶片碳LC | 叶片氮LN | 叶片磷LP | 叶片碳氮比LC/N | 叶片氮磷比LN/P | 叶片碳磷比LC/P |
---|---|---|---|---|---|---|
全碳Total carbon (TC) | 0.014 | 0.019 | -0.106 | -0.001 | 0.092 | 0.103 |
全氮Total nitrogen (TN) | -0.014 | 0.086 | -0.026 | -0.104 | 0.067 | 0.040 |
全磷Total phosphorus (TP) | -0.089 | -0.084 | 0.264** | 0.033 | -0.246** | -0.275** |
碳氮比Carbon nitrogen ratio (C/N) | 0.047 | -0.082 | -0.138* | 0.138* | 0.063 | 0.117 |
氮磷比Nitrogen phosphorus ratio (N/P) | 0.034 | 0.091 | -0.146* | -0.076 | 0.160* | 0.158* |
碳磷比Carbon phosphorus ratio (C/P) | 0.049 | 0.042 | -0.184** | -0.005 | 0.163* | 0.185** |
土壤含水量Soil moisture content (SMC) | -0.145* | -0.342** | 0.279** | 0.325** | -0.404** | -0.363** |
土壤紧实度Soil compactness (SC) | 0.040 | 0.004 | 0.022 | 0.002 | -0.008 | -0.001 |
Table 2 Pearson correlations between ecological stoichiometric characteristics of plant leaves and environmental factors
指标Indicator | 叶片碳LC | 叶片氮LN | 叶片磷LP | 叶片碳氮比LC/N | 叶片氮磷比LN/P | 叶片碳磷比LC/P |
---|---|---|---|---|---|---|
全碳Total carbon (TC) | 0.014 | 0.019 | -0.106 | -0.001 | 0.092 | 0.103 |
全氮Total nitrogen (TN) | -0.014 | 0.086 | -0.026 | -0.104 | 0.067 | 0.040 |
全磷Total phosphorus (TP) | -0.089 | -0.084 | 0.264** | 0.033 | -0.246** | -0.275** |
碳氮比Carbon nitrogen ratio (C/N) | 0.047 | -0.082 | -0.138* | 0.138* | 0.063 | 0.117 |
氮磷比Nitrogen phosphorus ratio (N/P) | 0.034 | 0.091 | -0.146* | -0.076 | 0.160* | 0.158* |
碳磷比Carbon phosphorus ratio (C/P) | 0.049 | 0.042 | -0.184** | -0.005 | 0.163* | 0.185** |
土壤含水量Soil moisture content (SMC) | -0.145* | -0.342** | 0.279** | 0.325** | -0.404** | -0.363** |
土壤紧实度Soil compactness (SC) | 0.040 | 0.004 | 0.022 | 0.002 | -0.008 | -0.001 |
变量 Variable | 贡献率 Contribution rate (%) | F | P |
---|---|---|---|
土壤含水量Soil moisture content (SMC) | 10.28 | 25.0047 | 0.001 |
全磷Total phosphorus (TP) | 1.39 | 3.3714 | 0.021 |
全氮Total nitrogen (TN) | 1.15 | 2.8028 | 0.058 |
Table 3 Contribution rate of environmental factors to variation of ecological stoichiometry characteristics of plant leaves in the optimal RDA model
变量 Variable | 贡献率 Contribution rate (%) | F | P |
---|---|---|---|
土壤含水量Soil moisture content (SMC) | 10.28 | 25.0047 | 0.001 |
全磷Total phosphorus (TP) | 1.39 | 3.3714 | 0.021 |
全氮Total nitrogen (TN) | 1.15 | 2.8028 | 0.058 |
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