Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (10): 1-13.DOI: 10.11686/cyxb2023446
Fang LIU(), Pei-pei WANG, Yu-ying CAO, Jun-e LIU, Zheng-chao ZHOU(
)
Received:
2023-11-21
Revised:
2024-01-12
Online:
2024-10-20
Published:
2024-07-15
Contact:
Zheng-chao ZHOU
Fang LIU, Pei-pei WANG, Yu-ying CAO, Jun-e LIU, Zheng-chao ZHOU. Root distribution characteristics of typical herbaceous plants and their effects on soil physicochemical properties on the Loess Plateau[J]. Acta Prataculturae Sinica, 2024, 33(10): 1-13.
坡点Slope code | 经度Longitude (E) | 纬度Latitude (N) | 海拔Elevation (m) | 坡度Slope ( | 砂粒Sand (%) | 粉粒Silt (%) | 黏粒Clay (%) |
---|---|---|---|---|---|---|---|
长芒草S. bungeana-1 | 110 | 38 | 1221.60 | 13 | 59.00 | 33.93 | 4.08 |
长芒草S. bungeana-2 | 110 | 38 | 1224.12 | 15 | 56.72 | 35.34 | 4.94 |
长芒草S. bungeana-3 | 110 | 38 | 1218.77 | 15 | 54.27 | 40.49 | 5.25 |
铁杆蒿A. gmelinii-1 | 110 | 38 | 1228.15 | 15 | 58.18 | 36.67 | 5.15 |
铁杆蒿A. gmelinii-2 | 110 | 38 | 1209.74 | 13 | 52.75 | 41.57 | 5.69 |
铁杆蒿A.gmelinii-3 | 110 | 38 | 1205.14 | 16 | 51.62 | 43.70 | 4.67 |
裸地CK | 110 | 38 | 1131.42 | 16 | 70.12 | 25.90 | 3.98 |
Table 1 Basic situation of each sample
坡点Slope code | 经度Longitude (E) | 纬度Latitude (N) | 海拔Elevation (m) | 坡度Slope ( | 砂粒Sand (%) | 粉粒Silt (%) | 黏粒Clay (%) |
---|---|---|---|---|---|---|---|
长芒草S. bungeana-1 | 110 | 38 | 1221.60 | 13 | 59.00 | 33.93 | 4.08 |
长芒草S. bungeana-2 | 110 | 38 | 1224.12 | 15 | 56.72 | 35.34 | 4.94 |
长芒草S. bungeana-3 | 110 | 38 | 1218.77 | 15 | 54.27 | 40.49 | 5.25 |
铁杆蒿A. gmelinii-1 | 110 | 38 | 1228.15 | 15 | 58.18 | 36.67 | 5.15 |
铁杆蒿A. gmelinii-2 | 110 | 38 | 1209.74 | 13 | 52.75 | 41.57 | 5.69 |
铁杆蒿A.gmelinii-3 | 110 | 38 | 1205.14 | 16 | 51.62 | 43.70 | 4.67 |
裸地CK | 110 | 38 | 1131.42 | 16 | 70.12 | 25.90 | 3.98 |
植物类型 Plant type | 根质量密度 Root mass density RMD (mg·cm-3) | 平均直径 Root diameter RD (mm) | 根长密度 Root length density RLD (cm·cm-3) | 根表面积密度 Root surface area density RSAD (cm2·cm-3) | 根体积密度 Root volume density RVD (102·cm3·cm-3) |
---|---|---|---|---|---|
长芒草(S) | 0.53±0.08* | 0.26±0.01* | 1.15±0.16* | 0.10±0.01* | 0.09±0.01 |
铁杆蒿(A) | 3.10±0.42* | 0.43±0.03* | 0.66±0.07* | 0.06±0.01* | 0.13±0.04 |
Table 2 Root characteristics of different plant communities
植物类型 Plant type | 根质量密度 Root mass density RMD (mg·cm-3) | 平均直径 Root diameter RD (mm) | 根长密度 Root length density RLD (cm·cm-3) | 根表面积密度 Root surface area density RSAD (cm2·cm-3) | 根体积密度 Root volume density RVD (102·cm3·cm-3) |
---|---|---|---|---|---|
长芒草(S) | 0.53±0.08* | 0.26±0.01* | 1.15±0.16* | 0.10±0.01* | 0.09±0.01 |
铁杆蒿(A) | 3.10±0.42* | 0.43±0.03* | 0.66±0.07* | 0.06±0.01* | 0.13±0.04 |
植物类型 Plant type | 径级 Diameter (D, mm) | 根长密度Root length density (cm·cm-3) | 占根系总根长百分比 Percentage of total root length (%) | ||
---|---|---|---|---|---|
0~10 cm | 10~20 cm | 20~30 cm | |||
长芒草 S. bungeana | 极细根(V) (0≤D<0.5) | 1.629±0.884a | 0.548±0.291a | 0.193±0.100a | 94.73 |
细根(F) (0.5≤D<2.0) | 0.107±0.087b | 0.012±0.006b | 0.003±0.002b | 4.76 | |
粗根(C) (D≥2.0) | 0.013±0.003b | - | - | 0.51 | |
铁杆蒿 A. gmelinii | 极细根(V) (0≤D<0.5) | 0.644±0.313a | 0.363±0.164a | 0.084±0.052a | 71.26 |
细根(F) (0.5≤D<2.0) | 0.129±0.088b | 0.059±0.015b | 0.011±0.002b | 12.46 | |
粗根(C) (D≥2.0) | 0.186±0.065b | 0.060±0.024b | 0.017±0.004b | 16.28 |
Table 3 Root length density of different plant communities with different diameters and soil depths
植物类型 Plant type | 径级 Diameter (D, mm) | 根长密度Root length density (cm·cm-3) | 占根系总根长百分比 Percentage of total root length (%) | ||
---|---|---|---|---|---|
0~10 cm | 10~20 cm | 20~30 cm | |||
长芒草 S. bungeana | 极细根(V) (0≤D<0.5) | 1.629±0.884a | 0.548±0.291a | 0.193±0.100a | 94.73 |
细根(F) (0.5≤D<2.0) | 0.107±0.087b | 0.012±0.006b | 0.003±0.002b | 4.76 | |
粗根(C) (D≥2.0) | 0.013±0.003b | - | - | 0.51 | |
铁杆蒿 A. gmelinii | 极细根(V) (0≤D<0.5) | 0.644±0.313a | 0.363±0.164a | 0.084±0.052a | 71.26 |
细根(F) (0.5≤D<2.0) | 0.129±0.088b | 0.059±0.015b | 0.011±0.002b | 12.46 | |
粗根(C) (D≥2.0) | 0.186±0.065b | 0.060±0.024b | 0.017±0.004b | 16.28 |
植物类型 Plant type | 径级 Diameter (D, mm) | 根表面积密度Root surface area density (cm2·cm-3) | 占根系总根表面积百分比 Percentage of total root surface area (%) | ||
---|---|---|---|---|---|
0~10 cm | 10~20 cm | 20~30 cm | |||
长芒草 S. bungeana | 极细根(V) (0≤D<0.5) | 0.141±0.074a | 0.042±0.020a | 0.015±0.007a | 90.20 |
细根(F) (0.5≤D<2.0) | 0.019±0.016b | 0.002±0.001b | 0.001±0.000b | 9.54 | |
粗根(C) (D≥2.0) | 0.011±0.001b | - | - | 0.26 | |
铁杆蒿 A. gmelinii | 极细根(V) (0≤D<0.5) | 0.044±0.025a | 0.027±0.011a | 0.006±0.004a | 45.42 |
细根(F) (0.5≤D<2.0) | 0.025±0.016a | 0.012±0.003b | 0.002±0.002b | 21.73 | |
粗根(C) (D≥2.0) | 0.043±0.013a | 0.021±0.007ab | 0.003±0.001b | 32.85 |
Table 4 Root surface area density of different plant communities with different diameters and soil depths
植物类型 Plant type | 径级 Diameter (D, mm) | 根表面积密度Root surface area density (cm2·cm-3) | 占根系总根表面积百分比 Percentage of total root surface area (%) | ||
---|---|---|---|---|---|
0~10 cm | 10~20 cm | 20~30 cm | |||
长芒草 S. bungeana | 极细根(V) (0≤D<0.5) | 0.141±0.074a | 0.042±0.020a | 0.015±0.007a | 90.20 |
细根(F) (0.5≤D<2.0) | 0.019±0.016b | 0.002±0.001b | 0.001±0.000b | 9.54 | |
粗根(C) (D≥2.0) | 0.011±0.001b | - | - | 0.26 | |
铁杆蒿 A. gmelinii | 极细根(V) (0≤D<0.5) | 0.044±0.025a | 0.027±0.011a | 0.006±0.004a | 45.42 |
细根(F) (0.5≤D<2.0) | 0.025±0.016a | 0.012±0.003b | 0.002±0.002b | 21.73 | |
粗根(C) (D≥2.0) | 0.043±0.013a | 0.021±0.007ab | 0.003±0.001b | 32.85 |
指标Index | PC1 | PC2 |
---|---|---|
土壤容重Bulk density, BD | -0.994 | 0.032 |
土壤总孔隙度Total porosity, TP | 0.994 | -0.032 |
毛管持水量Capillary water holding content, CHC | 0.980 | -0.059 |
毛管孔隙度Capillary porosity, CP | 0.931 | -0.044 |
饱和持水量Saturated water holding content, SWHC | 0.510 | 0.152 |
平均重量直径Mean weight diameter, MWD | 0.163 | 0.829 |
土壤有机质含量Soil organic matter, SOM | 0.260 | -0.758 |
非毛管孔隙度Non-capillary porosity, NCP | -0.101 | 0.039 |
土壤含水量Soil water content, SWC | 0.029 | 0.531 |
特征值Eigenvalue | 4.321 | 1.836 |
方差贡献率Variance contribution ratio (%) | 48.02 | 20.40 |
累计方差贡献率Cumulative variance contribution ratio (%) | 48.02 | 68.42 |
Table 5 Principal component variance contribution rate and load matrix of soil properties
指标Index | PC1 | PC2 |
---|---|---|
土壤容重Bulk density, BD | -0.994 | 0.032 |
土壤总孔隙度Total porosity, TP | 0.994 | -0.032 |
毛管持水量Capillary water holding content, CHC | 0.980 | -0.059 |
毛管孔隙度Capillary porosity, CP | 0.931 | -0.044 |
饱和持水量Saturated water holding content, SWHC | 0.510 | 0.152 |
平均重量直径Mean weight diameter, MWD | 0.163 | 0.829 |
土壤有机质含量Soil organic matter, SOM | 0.260 | -0.758 |
非毛管孔隙度Non-capillary porosity, NCP | -0.101 | 0.039 |
土壤含水量Soil water content, SWC | 0.029 | 0.531 |
特征值Eigenvalue | 4.321 | 1.836 |
方差贡献率Variance contribution ratio (%) | 48.02 | 20.40 |
累计方差贡献率Cumulative variance contribution ratio (%) | 48.02 | 68.42 |
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