Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (10): 1-14.DOI: 10.11686/cyxb2025433
Jing SI1,2(
), Yao WANG1,2, Zhong-lin XU1,3,4,5(
)
Received:2025-10-20
Revised:2025-12-09
Online:2026-10-20
Published:2026-09-09
Contact:
Zhong-lin XU
Jing SI, Yao WANG, Zhong-lin XU. Spatial variation of mineral-associated organic carbon in grassland on the northern slopes of the Tianshan Mountains[J]. Acta Prataculturae Sinica, 2026, 35(10): 1-14.
草地类型 Grassland types | 土层深度 Soil depth (cm) | 最小值 Minimum (g·kg-1) | 最大值 Maximum (g·kg-1) | 平均值 Mean (g·kg-1) | 标准差 Standard deviation | 变异系数 Coefficients of variation (%) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 1.45 | 5.58 | 3.28Ba | 1.48 | 45.13 |
| 10~20 | 1.03 | 4.74 | 2.86Ba | 1.34 | 47.08 | |
| 20~30 | 0.58 | 4.07 | 2.01Ba | 1.21 | 60.57 | |
典型草原 Typical steppe | 0~10 | 0.94 | 18.51 | 6.61Ba | 3.92 | 59.20 |
| 10~20 | 1.18 | 16.46 | 4.88Bab | 3.53 | 72.25 | |
| 20~30 | 0.37 | 10.01 | 3.44Bb | 2.06 | 60.00 | |
山地草甸 Mountain meadow | 0~10 | 3.88 | 23.65 | 13.15Aa | 5.61 | 42.68 |
| 10~20 | 4.03 | 18.63 | 11.64Aa | 3.92 | 33.66 | |
| 20~30 | 2.49 | 12.85 | 8.17Ab | 2.55 | 31.20 |
Table 1 Particulate organic carbon content of soil layer in three grassland types
草地类型 Grassland types | 土层深度 Soil depth (cm) | 最小值 Minimum (g·kg-1) | 最大值 Maximum (g·kg-1) | 平均值 Mean (g·kg-1) | 标准差 Standard deviation | 变异系数 Coefficients of variation (%) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 1.45 | 5.58 | 3.28Ba | 1.48 | 45.13 |
| 10~20 | 1.03 | 4.74 | 2.86Ba | 1.34 | 47.08 | |
| 20~30 | 0.58 | 4.07 | 2.01Ba | 1.21 | 60.57 | |
典型草原 Typical steppe | 0~10 | 0.94 | 18.51 | 6.61Ba | 3.92 | 59.20 |
| 10~20 | 1.18 | 16.46 | 4.88Bab | 3.53 | 72.25 | |
| 20~30 | 0.37 | 10.01 | 3.44Bb | 2.06 | 60.00 | |
山地草甸 Mountain meadow | 0~10 | 3.88 | 23.65 | 13.15Aa | 5.61 | 42.68 |
| 10~20 | 4.03 | 18.63 | 11.64Aa | 3.92 | 33.66 | |
| 20~30 | 2.49 | 12.85 | 8.17Ab | 2.55 | 31.20 |
草地类型 Grassland types | 土层深度 Soil depth (cm) | 最小值 Minimum (g·kg-1) | 最大值 Maximum (g·kg-1) | 平均值 Mean (g·kg-1) | 标准差 Standard deviation | 变异系数 Coefficients of variation (%) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 4.99 | 10.34 | 7.16Ba | 1.87 | 26.10 |
| 10~20 | 2.50 | 9.64 | 6.08Ca | 2.39 | 39.28 | |
| 20~30 | 3.39 | 9.33 | 5.90Ca | 1.98 | 33.46 | |
典型草原 Typical steppe | 0~10 | 3.14 | 38.58 | 14.64Ba | 8.58 | 58.63 |
| 10~20 | 1.23 | 31.23 | 12.17Ba | 7.79 | 64.02 | |
| 20~30 | 0.92 | 29.46 | 11.05Ba | 7.48 | 67.66 | |
山地草甸 Mountain meadow | 0~10 | 10.04 | 50.89 | 28.40Aa | 11.63 | 40.96 |
| 10~20 | 10.55 | 34.49 | 23.74Aab | 7.44 | 31.35 | |
| 20~30 | 8.69 | 27.37 | 18.95Ab | 5.87 | 30.97 |
Table 2 Mineral-associated organic carbon content of soil layer in three grassland types
草地类型 Grassland types | 土层深度 Soil depth (cm) | 最小值 Minimum (g·kg-1) | 最大值 Maximum (g·kg-1) | 平均值 Mean (g·kg-1) | 标准差 Standard deviation | 变异系数 Coefficients of variation (%) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 4.99 | 10.34 | 7.16Ba | 1.87 | 26.10 |
| 10~20 | 2.50 | 9.64 | 6.08Ca | 2.39 | 39.28 | |
| 20~30 | 3.39 | 9.33 | 5.90Ca | 1.98 | 33.46 | |
典型草原 Typical steppe | 0~10 | 3.14 | 38.58 | 14.64Ba | 8.58 | 58.63 |
| 10~20 | 1.23 | 31.23 | 12.17Ba | 7.79 | 64.02 | |
| 20~30 | 0.92 | 29.46 | 11.05Ba | 7.48 | 67.66 | |
山地草甸 Mountain meadow | 0~10 | 10.04 | 50.89 | 28.40Aa | 11.63 | 40.96 |
| 10~20 | 10.55 | 34.49 | 23.74Aab | 7.44 | 31.35 | |
| 20~30 | 8.69 | 27.37 | 18.95Ab | 5.87 | 30.97 |
草地类型 Grassland types | 土层 Soil depth (cm) | pH | 电导率 Electric conductivity (dS·m-1) | 全氮 Total nitrogen (g·kg-1) | 全磷 Total phosphorus (g·kg-1) | 速效磷 Available phosphorous (g·kg-1) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 7.83±0.30Aa | 0.86±1.04Aa | 0.22±0.05Aa | 0.03±0.01Aa | 12.91±3.76Aa |
| 10~20 | 7.78±0.30Ab | 0.80±0.96Ab | 0.17±0.03ABa | 0.02±0.01Aa | 9.08±1.47Aa | |
| 20~30 | 7.74±0.28Ac | 0.76±0.90Aa | 0.14±0.02Ba | 0.03±0.01Aa | 7.07±1.07Aa | |
典型草原 Typical steppe | 0~10 | 7.66±0.27Ab | 0.38±0.23Aa | 0.29±0.11Aa | 0.03±0.01Aa | 14.36±4.39Aa |
| 10~20 | 7.61±0.27Aa | 0.36±0.23Ab | 0.19±0.04ABa | 0.02±0.01Aa | 9.34±3.54Aa | |
| 20~30 | 7.57±0.27Ab | 0.35±0.22Aa | 0.14±0.03Ba | 0.02±0.01Aa | 7.83±2.35Aa | |
山地草甸 Mountain meadow | 0~10 | 7.52±0.22Aa | 0.89±2.25Aa | 0.33±0.14Aa | 0.03±0.01Aa | 26.40±29.72Aa |
| 10~20 | 7.48±0.22Ab | 0.88±2.20Ab | 0.24±0.12ABa | 0.03±0.01Aa | 18.68±21.49Aa | |
| 20~30 | 7.43±0.22Ac | 0.87±2.18Aa | 0.15±0.04Ba | 0.03±0.01Aa | 13.45±17.18Aa |
Table 3 Soil physicochemical properties across soil layers in northern slope of Tianshan Mountains grasslands
草地类型 Grassland types | 土层 Soil depth (cm) | pH | 电导率 Electric conductivity (dS·m-1) | 全氮 Total nitrogen (g·kg-1) | 全磷 Total phosphorus (g·kg-1) | 速效磷 Available phosphorous (g·kg-1) |
|---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 0~10 | 7.83±0.30Aa | 0.86±1.04Aa | 0.22±0.05Aa | 0.03±0.01Aa | 12.91±3.76Aa |
| 10~20 | 7.78±0.30Ab | 0.80±0.96Ab | 0.17±0.03ABa | 0.02±0.01Aa | 9.08±1.47Aa | |
| 20~30 | 7.74±0.28Ac | 0.76±0.90Aa | 0.14±0.02Ba | 0.03±0.01Aa | 7.07±1.07Aa | |
典型草原 Typical steppe | 0~10 | 7.66±0.27Ab | 0.38±0.23Aa | 0.29±0.11Aa | 0.03±0.01Aa | 14.36±4.39Aa |
| 10~20 | 7.61±0.27Aa | 0.36±0.23Ab | 0.19±0.04ABa | 0.02±0.01Aa | 9.34±3.54Aa | |
| 20~30 | 7.57±0.27Ab | 0.35±0.22Aa | 0.14±0.03Ba | 0.02±0.01Aa | 7.83±2.35Aa | |
山地草甸 Mountain meadow | 0~10 | 7.52±0.22Aa | 0.89±2.25Aa | 0.33±0.14Aa | 0.03±0.01Aa | 26.40±29.72Aa |
| 10~20 | 7.48±0.22Ab | 0.88±2.20Ab | 0.24±0.12ABa | 0.03±0.01Aa | 18.68±21.49Aa | |
| 20~30 | 7.43±0.22Ac | 0.87±2.18Aa | 0.15±0.04Ba | 0.03±0.01Aa | 13.45±17.18Aa |
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