Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (4): 34-45.DOI: 10.11686/cyxb2020175
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Zhong-chao SUN1(), Tian-dou GUO1, Lu YU1, Yan-ping MA1, Ya-nan ZHAO1, Xue-ying LI1, Hong-mei WANG1,2()
Received:
2020-04-14
Revised:
2020-05-11
Online:
2021-04-20
Published:
2021-03-16
Contact:
Hong-mei WANG
Zhong-chao SUN, Tian-dou GUO, Lu YU, Yan-ping MA, Ya-nan ZHAO, Xue-ying LI, Hong-mei WANG. Changes in soil particle size distribution and fractal characteristics across an anthropogenic transition from desert steppe grassland to shrubland in eastern Ningxia[J]. Acta Prataculturae Sinica, 2021, 30(4): 34-45.
样地 Site | 经纬度 Longitude and latitude | 灌木盖度Shrubs coverage (%) | pH | 草本盖度Herbage coverage (%) | 物种数Special number | 优势种 Dominant species |
---|---|---|---|---|---|---|
荒漠草地 Desert grassland (DG) | 107°16′24″ E 37°46′31″ N | 0 | 8.35 | 70.0 | 25 | 蒙古冰草,短花针茅,猪毛蒿,刺藜A. mongolicum, S. breviflora, A. scoparia, Chenopodium aristatum |
草地边缘 Grassland edge (GE) | 107°16′08″ E 107°46′32″ N | 7.9 | 8.19 | 66.6 | 19 | 草木樨状黄芪,短花针茅,牛枝子,乳浆大戟Astragalus melilotoides, S. breviflora, L. potaninii, E. esula |
灌丛边缘 Shrubland edge (SE) | 107°17′43″ E 107°43′53″ N | 14.9 | 8.34 | 47.9 | 16 | 短花针茅,牛枝子,银灰旋花,远志S. breviflora, L. potaninii, C. ammannii, P. tenuifolia |
灌丛地 Shrubland (SL) | 107°17′52″ E 107°44′44″ N | 51.4 | 8.39 | 12.6 | 16 | 糙隐子草,猪毛蒿,地锦,狗尾草C. squarrosa, A. scoparia, Euphorbia humifusa, S. viridis |
Table 1 Descriptions of study sites
样地 Site | 经纬度 Longitude and latitude | 灌木盖度Shrubs coverage (%) | pH | 草本盖度Herbage coverage (%) | 物种数Special number | 优势种 Dominant species |
---|---|---|---|---|---|---|
荒漠草地 Desert grassland (DG) | 107°16′24″ E 37°46′31″ N | 0 | 8.35 | 70.0 | 25 | 蒙古冰草,短花针茅,猪毛蒿,刺藜A. mongolicum, S. breviflora, A. scoparia, Chenopodium aristatum |
草地边缘 Grassland edge (GE) | 107°16′08″ E 107°46′32″ N | 7.9 | 8.19 | 66.6 | 19 | 草木樨状黄芪,短花针茅,牛枝子,乳浆大戟Astragalus melilotoides, S. breviflora, L. potaninii, E. esula |
灌丛边缘 Shrubland edge (SE) | 107°17′43″ E 107°43′53″ N | 14.9 | 8.34 | 47.9 | 16 | 短花针茅,牛枝子,银灰旋花,远志S. breviflora, L. potaninii, C. ammannii, P. tenuifolia |
灌丛地 Shrubland (SL) | 107°17′52″ E 107°44′44″ N | 51.4 | 8.39 | 12.6 | 16 | 糙隐子草,猪毛蒿,地锦,狗尾草C. squarrosa, A. scoparia, Euphorbia humifusa, S. viridis |
样地 Sample plot | 土壤深度 Soil depth (cm) | 土壤粒径体积百分含量 Volume percentage of soil particle size distribution (%) | 分形维数 Fractal dimension (D) | ||
---|---|---|---|---|---|
黏粒Clay (<2 μm) | 粉粒Silt (2~50 μm) | 砂粒Sand (50~2000 μm) | |||
荒漠草地 Desert grassland (DG) | 0~10 | 0.01±0.01c | 28.20±0.93cd | 71.79±0.92bc | 2.25±0.05Abc |
10~20 | 0.78±0.78bc | 30.31±1.19bc | 68.91±1.97cd | 2.24±0.04Abc | |
20~40 | 3.46±0.10a | 35.56±0.10a | 60.98±0.19e | 2.42±0.00Aa | |
40~60 | 2.86±0.97a | 31.72±2.63b | 65.42±3.60d | 2.39±0.04Aab | |
60~80 | 0.94±0.50bc | 21.00±1.09e | 78.06±0.59a | 2.10±0.10Bc | |
80~100 | 1.42±0.05b | 25.36±2.59d | 73.22±2.55b | 2.32±0.03Bab | |
变异系数CV | 0.76 | 0.16 | 0.08 | 0.05 | |
草地边缘 Grassland edge (GE) | 0~10 | 0.04±0.00c | 29.81±0.10a | 70.15±0.09cd | 2.26±0.02Abc |
10~20 | 0.31±0.27c | 27.82±2.08ab | 71.87±1.82c | 2.24±0.01Ac | |
20~40 | 2.27±0.31b | 24.94±0.22c | 72.79±0.09c | 2.35±0.01Aab | |
40~60 | 3.85±1.62a | 27.28±1.93b | 68.87±3.55d | 2.44±0.05Aa | |
60~80 | 0.01±0.01c | 18.13±0.44d | 81.86±0.45b | 2.11±0.02Bc | |
80~100 | 0.00±0.00c | 13.51±0.86e | 86.49±0.86a | 1.96±0.06Cd | |
变异系数CV | 1.37 | 0.25 | 0.09 | 0.07 | |
灌丛边缘 Shrub edge (SE) | 0~10 | 0.00±0.00c | 3.94±0.21d | 96.06±0.21a | 1.42±0.11Bc |
10~20 | 0.00±0.00c | 7.88±4.16d | 92.12±4.16a | 1.52±0.17Bc | |
20~40 | 0.43±0.41c | 23.27±0.23c | 76.30±0.63b | 2.13±0.04Bb | |
40~60 | 7.32±2.73a | 44.10±5.43b | 48.58±8.15c | 2.58±0.06Aa | |
60~80 | 4.11±1.31b | 49.04±4.43ab | 46.85±5.74cd | 2.51±0.04Aa | |
80~100 | 6.23±0.40ab | 53.55±2.10a | 40.22±1.70d | 2.58±0.00Aa | |
变异系数CV | 1.00 | 0.65 | 0.34 | 0.23 | |
灌丛地 Shrub land (SL) | 0~10 | 0.00±0.00a | 4.27±1.87a | 95.73±1.86b | 1.45±0.10Bab |
10~20 | 0.00±0.00a | 2.24±0.17ab | 97.76±0.16ab | 1.39±0.06Bbc | |
20~40 | 0.00±0.00a | 1.39±0.33b | 98.61±0.33a | 1.78±0.05Ca | |
40~60 | 0.00±0.00a | 2.26±0.95ab | 97.74±0.95ab | 1.07±0.18Bcd | |
60~80 | 0.00±0.00a | 4.46±2.98a | 95.54±2.98b | 1.35±0.15Cbcd | |
80~100 | 0.00±0.00a | 1.03±0.00b | 98.97±0.00a | 1.02±0.08Dd | |
变异系数CV | 0 | 0.51 | 0.01 | 0.19 |
Table 2 Soil particle size distribution and its fractal dimension in different desert grassland-shrubland transition stages
样地 Sample plot | 土壤深度 Soil depth (cm) | 土壤粒径体积百分含量 Volume percentage of soil particle size distribution (%) | 分形维数 Fractal dimension (D) | ||
---|---|---|---|---|---|
黏粒Clay (<2 μm) | 粉粒Silt (2~50 μm) | 砂粒Sand (50~2000 μm) | |||
荒漠草地 Desert grassland (DG) | 0~10 | 0.01±0.01c | 28.20±0.93cd | 71.79±0.92bc | 2.25±0.05Abc |
10~20 | 0.78±0.78bc | 30.31±1.19bc | 68.91±1.97cd | 2.24±0.04Abc | |
20~40 | 3.46±0.10a | 35.56±0.10a | 60.98±0.19e | 2.42±0.00Aa | |
40~60 | 2.86±0.97a | 31.72±2.63b | 65.42±3.60d | 2.39±0.04Aab | |
60~80 | 0.94±0.50bc | 21.00±1.09e | 78.06±0.59a | 2.10±0.10Bc | |
80~100 | 1.42±0.05b | 25.36±2.59d | 73.22±2.55b | 2.32±0.03Bab | |
变异系数CV | 0.76 | 0.16 | 0.08 | 0.05 | |
草地边缘 Grassland edge (GE) | 0~10 | 0.04±0.00c | 29.81±0.10a | 70.15±0.09cd | 2.26±0.02Abc |
10~20 | 0.31±0.27c | 27.82±2.08ab | 71.87±1.82c | 2.24±0.01Ac | |
20~40 | 2.27±0.31b | 24.94±0.22c | 72.79±0.09c | 2.35±0.01Aab | |
40~60 | 3.85±1.62a | 27.28±1.93b | 68.87±3.55d | 2.44±0.05Aa | |
60~80 | 0.01±0.01c | 18.13±0.44d | 81.86±0.45b | 2.11±0.02Bc | |
80~100 | 0.00±0.00c | 13.51±0.86e | 86.49±0.86a | 1.96±0.06Cd | |
变异系数CV | 1.37 | 0.25 | 0.09 | 0.07 | |
灌丛边缘 Shrub edge (SE) | 0~10 | 0.00±0.00c | 3.94±0.21d | 96.06±0.21a | 1.42±0.11Bc |
10~20 | 0.00±0.00c | 7.88±4.16d | 92.12±4.16a | 1.52±0.17Bc | |
20~40 | 0.43±0.41c | 23.27±0.23c | 76.30±0.63b | 2.13±0.04Bb | |
40~60 | 7.32±2.73a | 44.10±5.43b | 48.58±8.15c | 2.58±0.06Aa | |
60~80 | 4.11±1.31b | 49.04±4.43ab | 46.85±5.74cd | 2.51±0.04Aa | |
80~100 | 6.23±0.40ab | 53.55±2.10a | 40.22±1.70d | 2.58±0.00Aa | |
变异系数CV | 1.00 | 0.65 | 0.34 | 0.23 | |
灌丛地 Shrub land (SL) | 0~10 | 0.00±0.00a | 4.27±1.87a | 95.73±1.86b | 1.45±0.10Bab |
10~20 | 0.00±0.00a | 2.24±0.17ab | 97.76±0.16ab | 1.39±0.06Bbc | |
20~40 | 0.00±0.00a | 1.39±0.33b | 98.61±0.33a | 1.78±0.05Ca | |
40~60 | 0.00±0.00a | 2.26±0.95ab | 97.74±0.95ab | 1.07±0.18Bcd | |
60~80 | 0.00±0.00a | 4.46±2.98a | 95.54±2.98b | 1.35±0.15Cbcd | |
80~100 | 0.00±0.00a | 1.03±0.00b | 98.97±0.00a | 1.02±0.08Dd | |
变异系数CV | 0 | 0.51 | 0.01 | 0.19 |
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