Chin J Plant Ecol ›› 2007, Vol. 31 ›› Issue (1): 66-74.DOI: 10.17521/cjpe.2007.0009
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JIA Xiao-Hong(), LI Xin-Rong, LI Yuan-Shou
Received:
2005-09-09
Accepted:
2005-12-13
Online:
2007-09-09
Published:
2007-01-30
JIA Xiao-Hong, LI Xin-Rong, LI Yuan-Shou. SOIL ORGANIC CARBON AND NITROGEN DYNAMICS DURING THE RE-VEGETATION PROCESS IN THE ARID DESERT REGION[J]. Chin J Plant Ecol, 2007, 31(1): 66-74.
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恢复年代 Age of re- vegetation | 植被总盖度 Total vegetation coverage (%) | 优势种 Dominant species | 土壤结皮 Soil crust (cm) | 土壤含水量 Soil moisture (%) | 土壤微生物 Soil microbe amount (103·g-1) | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1956 | 25.19 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides) | 2.1 | 1.162 | 32 253.49 | ||||||||||||||||||||||||
1964 | 27.67 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、柠条(Caragana korshinskii) | 1.0 | 1.170 | 63 794.88 | ||||||||||||||||||||||||
1981 | 36.37 | 沙米(Agriophyllum squarrosum)、油蒿(Artemisia ordosica) | 0.4 | 1.516 | 2 073.10 | ||||||||||||||||||||||||
1987 | 30.00 | 油蒿(Artemisia ordosica)、沙木蓼(Atraphaxis bracteata) | 0.3 | 2.027 | |||||||||||||||||||||||||
1990 | 40.00 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides) | 0.2 | 2.560 | |||||||||||||||||||||||||
2000 | 雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides)、沙米(Agriophyllum squarrosum) | - | 2.720 | ||||||||||||||||||||||||||
流沙地 Shifting sand | <1.0 | 沙米(Agriophyllum squarrosum)、花棒(Hedysarum scoparium) | 0 | 3.038 | 15 699.80 |
Table 1 The status of ecological environmental succession in different age of re-vegetation
恢复年代 Age of re- vegetation | 植被总盖度 Total vegetation coverage (%) | 优势种 Dominant species | 土壤结皮 Soil crust (cm) | 土壤含水量 Soil moisture (%) | 土壤微生物 Soil microbe amount (103·g-1) | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1956 | 25.19 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides) | 2.1 | 1.162 | 32 253.49 | ||||||||||||||||||||||||
1964 | 27.67 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、柠条(Caragana korshinskii) | 1.0 | 1.170 | 63 794.88 | ||||||||||||||||||||||||
1981 | 36.37 | 沙米(Agriophyllum squarrosum)、油蒿(Artemisia ordosica) | 0.4 | 1.516 | 2 073.10 | ||||||||||||||||||||||||
1987 | 30.00 | 油蒿(Artemisia ordosica)、沙木蓼(Atraphaxis bracteata) | 0.3 | 2.027 | |||||||||||||||||||||||||
1990 | 40.00 | 油蒿(Artemisia ordosica)、雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides) | 0.2 | 2.560 | |||||||||||||||||||||||||
2000 | 雾冰藜(Bassia dasyphylla)、小画眉草(Eragrostis poaeoides)、沙米(Agriophyllum squarrosum) | - | 2.720 | ||||||||||||||||||||||||||
流沙地 Shifting sand | <1.0 | 沙米(Agriophyllum squarrosum)、花棒(Hedysarum scoparium) | 0 | 3.038 | 15 699.80 |
恢复年限 Year since re-vegetation (a) | 0~5 cm (g·kg-1) | 5~10 cm (g·kg-1) | 10~20 cm (g·kg-1) | ||||||
---|---|---|---|---|---|---|---|---|---|
SOC | TN | C/N | SOC | TN | C/N | SOC | TN | C/N | |
0 | 0.23±0.01a | 0.01±0.01a | 22.92a | 0.26±0a | 0.01±0.01a | 26.03a | 0.24±0a | 0.01±0.01a | 24.21a |
4 | 0.93±0.02a | 0.11±0.01b | 8.45b | 0.96±0a | 0.10±0.01b | 9.60b | 0.90±0abc | 0.09±0.01b | 10.00b |
14 | 1.78±0.01b | 0.20±0.01c | 8.90b | 1.76±0b | 0.13±0.01c | 13.54c | 1.15±0bc | 0.11±0.01b | 10.45b |
17 | 1.76±0.11b | 0.21±0.03c | 9.37bc | 1.77±0.3b | 0.14±0.01c | 14.22c | 1.15±0.25ab | 0.11±0.01b | 10.66b |
23 | 2.54±0.18b | 0.26±0.04c | 9.50bc | 1.79±0.3b | 0.16±0.01c | 11.43c | 1.16±0.23bc | 0.12±0.02b | 10.66b |
40 | 4.42±0.41c | 0.35±0.04d | 12.37c | 2.38±0.33c | 0.20±0.04d | 13.21c | 1.43±0.2c | 0.14±0.03b | 11.83bc |
48 | 6.69±0.74d | 0.42±0.06d | 16.01d | 4.44±0.39d | 0.26±0.04d | 18.07d | 2.42±0.28d | 0.15±0.02b | 16.96c |
Table 2 Variation of organic carbon (SOC) and total nitrogen (TN) in soils of different year since re-vegetation
恢复年限 Year since re-vegetation (a) | 0~5 cm (g·kg-1) | 5~10 cm (g·kg-1) | 10~20 cm (g·kg-1) | ||||||
---|---|---|---|---|---|---|---|---|---|
SOC | TN | C/N | SOC | TN | C/N | SOC | TN | C/N | |
0 | 0.23±0.01a | 0.01±0.01a | 22.92a | 0.26±0a | 0.01±0.01a | 26.03a | 0.24±0a | 0.01±0.01a | 24.21a |
4 | 0.93±0.02a | 0.11±0.01b | 8.45b | 0.96±0a | 0.10±0.01b | 9.60b | 0.90±0abc | 0.09±0.01b | 10.00b |
14 | 1.78±0.01b | 0.20±0.01c | 8.90b | 1.76±0b | 0.13±0.01c | 13.54c | 1.15±0bc | 0.11±0.01b | 10.45b |
17 | 1.76±0.11b | 0.21±0.03c | 9.37bc | 1.77±0.3b | 0.14±0.01c | 14.22c | 1.15±0.25ab | 0.11±0.01b | 10.66b |
23 | 2.54±0.18b | 0.26±0.04c | 9.50bc | 1.79±0.3b | 0.16±0.01c | 11.43c | 1.16±0.23bc | 0.12±0.02b | 10.66b |
40 | 4.42±0.41c | 0.35±0.04d | 12.37c | 2.38±0.33c | 0.20±0.04d | 13.21c | 1.43±0.2c | 0.14±0.03b | 11.83bc |
48 | 6.69±0.74d | 0.42±0.06d | 16.01d | 4.44±0.39d | 0.26±0.04d | 18.07d | 2.42±0.28d | 0.15±0.02b | 16.96c |
恢复年限 Year since re-vegeta- tion (a) | 土壤颗粒组成分布 Distribution of particle size fractions (mm) | ||||||||
---|---|---|---|---|---|---|---|---|---|
0.5~0.1 | 0.1~0.05 | <0.05 | 0.5~0.1 | 0.1~0.05 | <0.05 | 0.5~0.1 | 0.1~0.05 | <0.05 | |
0~5 cm | 5~10 cm | 10~20 cm | |||||||
0 | 98.73±0a | 0.90±0a | 0.37±0a | 98.53±0a | 1.20±0a | 0.27±0a | 98.30±0a | 1.40±0a | 0.30±0a |
4 | 96.75±0a | 2.30±0a | 0.95±0a | 96.73±0ab | 2.30±0a | 0.97±0ab | 96.65±0ab | 2.49±0ab | 0.86±0a |
14 | 75.29±0b | 12.40±0b | 12.31±0b | 89.87±0bc | 6.07±0b | 4.06±0bc | 95.95±0ab | 2.86±0ab | 1.19±0a |
17 | 75.32±3.33b | 14.10±1.8b | 10.58±1.55b | 83.80±1.49cd | 9.10±0.78bc | 7.10±0cd | 92.26±1.12bc | 4.59±0.7bc | 3.16±0.51b |
23 | 69.83±4.88b | 16.34±2.9bc | 13.83±2.25b | 81.09±2.53de | 11.38±1.57cd | 7.53±0.96cd | 89.24±0.69c | 6.39±0.39c | 4.37±0.41bc |
40 | 59.00±4.52c | 20.44±2.28c | 20.57±2.26c | 75.71±3.32ef | 13.82±1.61de | 10.48±1.75d | 84.81±2.2d | 9.08±1.38d | 6.12±0.97cd |
48 | 57.65±4.98d | 20.33±1.71c | 22.02±3.28c | 70.17±4.65f | 15.13±2.25e | 14.70±2.4e | 81.85±3.05d | 10.81±1.79d | 7.34±1.3d |
Table 3 Distribution of particle size fractions in soils of different year since re-vegetation
恢复年限 Year since re-vegeta- tion (a) | 土壤颗粒组成分布 Distribution of particle size fractions (mm) | ||||||||
---|---|---|---|---|---|---|---|---|---|
0.5~0.1 | 0.1~0.05 | <0.05 | 0.5~0.1 | 0.1~0.05 | <0.05 | 0.5~0.1 | 0.1~0.05 | <0.05 | |
0~5 cm | 5~10 cm | 10~20 cm | |||||||
0 | 98.73±0a | 0.90±0a | 0.37±0a | 98.53±0a | 1.20±0a | 0.27±0a | 98.30±0a | 1.40±0a | 0.30±0a |
4 | 96.75±0a | 2.30±0a | 0.95±0a | 96.73±0ab | 2.30±0a | 0.97±0ab | 96.65±0ab | 2.49±0ab | 0.86±0a |
14 | 75.29±0b | 12.40±0b | 12.31±0b | 89.87±0bc | 6.07±0b | 4.06±0bc | 95.95±0ab | 2.86±0ab | 1.19±0a |
17 | 75.32±3.33b | 14.10±1.8b | 10.58±1.55b | 83.80±1.49cd | 9.10±0.78bc | 7.10±0cd | 92.26±1.12bc | 4.59±0.7bc | 3.16±0.51b |
23 | 69.83±4.88b | 16.34±2.9bc | 13.83±2.25b | 81.09±2.53de | 11.38±1.57cd | 7.53±0.96cd | 89.24±0.69c | 6.39±0.39c | 4.37±0.41bc |
40 | 59.00±4.52c | 20.44±2.28c | 20.57±2.26c | 75.71±3.32ef | 13.82±1.61de | 10.48±1.75d | 84.81±2.2d | 9.08±1.38d | 6.12±0.97cd |
48 | 57.65±4.98d | 20.33±1.71c | 22.02±3.28c | 70.17±4.65f | 15.13±2.25e | 14.70±2.4e | 81.85±3.05d | 10.81±1.79d | 7.34±1.3d |
恢复年限 Year since re- vegetation (a) | 物理稳定性指数 (Physical stability index, St) (%) | ||
---|---|---|---|
0~5 cm (包括结皮层 Including soil crust) | 5~10 cm | 10~20 cm | |
0 | 10.72 | 16.60 | 13.79 |
4 | 16.88 | 17.06 | 18.04 |
14 | 2.49 | 7.47 | 16.66 |
17 | 2.87 | 4.30 | 6.27 |
23 | 3.17 | 4.10 | 4.58 |
40 | 3.70 | 3.92 | 4.03 |
48 | 5.24 | 5.21 | 5.68 |
Table 4 The physical stability index (St) in the different year since re-vegetation
恢复年限 Year since re- vegetation (a) | 物理稳定性指数 (Physical stability index, St) (%) | ||
---|---|---|---|
0~5 cm (包括结皮层 Including soil crust) | 5~10 cm | 10~20 cm | |
0 | 10.72 | 16.60 | 13.79 |
4 | 16.88 | 17.06 | 18.04 |
14 | 2.49 | 7.47 | 16.66 |
17 | 2.87 | 4.30 | 6.27 |
23 | 3.17 | 4.10 | 4.58 |
40 | 3.70 | 3.92 | 4.03 |
48 | 5.24 | 5.21 | 5.68 |
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