Arid Zone Research ›› 2024, Vol. 41 ›› Issue (8): 1364-1372.doi: 10.13866/j.azr.2024.08.10
• Land and Water Resources • Previous Articles Next Articles
ZHANG Peihao1(), XING Guangyan2(), ZHAO Jimei3, LIU Changyi1, HU Xiasong1
Received:
2024-01-15
Revised:
2024-03-05
Online:
2024-08-15
Published:
2024-08-22
Contact:
XING Guangyan
E-mail:zph13419866725@163.com;xingguangyan@qhu.edu.cn
ZHANG Peihao, XING Guangyan, ZHAO Jimei, LIU Changyi, HU Xiasong. Soil physical and mechanical properties of lightly grazed and prohibited grasslands: A case study of Xiazangtan landslide area[J].Arid Zone Research, 2024, 41(8): 1364-1372.
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Tab. 2
Analysis of in-situ statistical results of plant growth indexes in lightly grazing grassland and forbidden grazing grassland"
草地类型 | 取样点位置 | 覆盖度/% | 平均覆盖度/% | 植物种类数 | 平均株高/cm | 植株数量 | 优势物种 |
---|---|---|---|---|---|---|---|
轻度放牧草地 | 阳坡坡顶 | 10±1.35 | 13.67±3.36 | 2±1.33 | 7.72±3.78 | 31±3.16 | 异针茅Stipa aliena |
阳坡坡中 | 13±1.24 | 4±1.19 | 8.31±2.41 | 43±4.12 | 多裂骆驼蓬Peganum multisectum | ||
阳坡坡底 | 18±2.41 | 5±0.53 | 5.72±3.17 | 38±3.55 | 多裂骆驼蓬Peganum multisectum | ||
阴坡坡顶 | 18±1.12 | 21.33±5.36 | 6±1.13 | 7.11±1.19 | 54±3.74 | 异针茅Stipa aliena | |
阴坡坡中 | 20±0.86 | 4±0.76 | 16.13±1.55 | 44±2.34 | 赖草Leymus secalinus | ||
阴坡坡底 | 26±3.21 | 7±0.69 | 8.53±2.45 | 75±1.29 | 多裂骆驼蓬Peganum multisectum | ||
禁牧草地 | 阳坡坡顶 | 16±1.03 | 21.00±2.25 | 6±1.40 | 12.38±1.45 | 40±4.31 | 多裂骆驼蓬Peganum multisectum |
阳坡坡中 | 20±0.76 | 5±1.19 | 6.71±1.75 | 38±2.34 | 异针茅Stipa aliena | ||
阳坡坡底 | 27±1.75 | 8±3.33 | 10.62±1.24 | 47±7.35 | 异针茅Stipa aliena | ||
阴坡坡顶 | 26±1.51 | 37.67±4.21 | 8±2.01 | 19.68±1.43 | 52±6.69 | 异针茅Stipa aliena | |
阴坡坡中 | 39±1.32 | 8±1.21 | 13.95±1.19 | 60±5.63 | 赖草Leymus secalinus | ||
阴坡坡底 | 45±1.66 | 10±1.33 | 7.26±1.24 | 112±10.99 | 异针茅Stipa aliena |
Tab. 3
Soil physical properties lightly grazing grassland and forbidden grazing grassland"
草地类型 | 取样位置 | 取样深度/cm | 含水率/% | 土壤密度/(g·cm-3) | 根系干重密度/(mg·cm-3) |
---|---|---|---|---|---|
轻度放牧草地 | 阳坡坡顶 | 0~10 | 8.11±0.256 | 1.19±0.013 | 22.17±4.45 |
10~20 | 7.80±0.313 | 1.16±0.022 | 18.83±8.32 | ||
20~30 | 7.11±0.255 | 1.20±0.037 | 10.17±5.54 | ||
阳坡坡中 | 0~10 | 8.86±0.162 | 1.22±0.056 | 25.17±2.36 | |
10~20 | 8.02±0.125 | 1.13±0.047 | 23.00±3.44 | ||
20~30 | 7.64±0.431 | 1.25±0.024 | 20.50±8.46 | ||
阳坡坡底 | 0~10 | 10.61±0.556 | 1.32±0.027 | 37.17±6.66 | |
10~20 | 8.56±1.035 | 1.22±0.037 | 30.33±4.37 | ||
20~30 | 7.81±0.216 | 1.41±0.027 | 27.00±5.54 | ||
阴坡坡顶 | 0~10 | 9.12±0.147 | 1.15±0.036 | 27.67±10.69 | |
10~20 | 8.21±0.335 | 1.11±0.044 | 23.67±2.34 | ||
20~30 | 6.56±0.345 | 1.19±0.022 | 19.67±3.45 | ||
阴坡坡中 | 0~10 | 9.79±0.551 | 1.19±0.024 | 38.50±4.31 | |
10~20 | 8.66±0.347 | 1.06±0.058 | 32.83±8.36 | ||
20~30 | 7.12±0.249 | 1.23±0.034 | 22.00±2.34 | ||
阴坡坡底 | 0~10 | 11.32±0.146 | 1.23±0.014 | 44.50±5.43 | |
10~20 | 9.42±0.138 | 1.15±0.052 | 36.00±4.96 | ||
20~30 | 8.47±0.114 | 1.26±0.035 | 33.17±7.32 | ||
禁牧草地 | 阳坡坡顶 | 0~10 | 11.38±0.212 | 1.09±0.023 | 27.67±3.51 |
10~20 | 11.04±0.750 | 1.01±0.025 | 22.67±4.64 | ||
20~30 | 10.48±0.132 | 1.12±0.033 | 19.33±2.38 | ||
阳坡坡中 | 0~10 | 12.95±0.314 | 1.12±0.066 | 39.00±2.55 | |
10~20 | 12.37±0.170 | 1.06±0.051 | 35.33±4.36 | ||
20~30 | 10.82±0.221 | 1.16±0.102 | 24.17±6.67 | ||
阳坡坡底 | 0~10 | 14.82±0.380 | 1.14±0.030 | 52.00±3.36 | |
10~20 | 12.52±0.460 | 1.09±0.034 | 39.17±6.55 | ||
20~30 | 11.76±0.135 | 1.18±0.017 | 31.17±4.23 | ||
阴坡坡顶 | 0~10 | 12.47±0.201 | 1.01±0.028 | 38.50±4.31 | |
10~20 | 12.28±0.146 | 0.82±0.056 | 28.50±2.37 | ||
20~30 | 11.23±0.384 | 1.16±0.026 | 25.33±10.66 | ||
阴坡坡中 | 0~10 | 13.47±0.147 | 1.06±0.037 | 52.83±4.38 | |
10~20 | 12.86±0.136 | 0.99±0.015 | 45.50±10.36 | ||
20~30 | 12.13±0.178 | 1.11±0.102 | 27.67±4.78 | ||
阴坡坡底 | 0~10 | 15.24±0.960 | 1.09±0.086 | 61.50±8.69 | |
10~20 | 13.31±0.366 | 1.03±0.078 | 57.00±9.53 | ||
20~30 | 12.86±0.241 | 1.14±0.010 | 46.33±6.99 |
Tab. 4
Calculation results of correlation coefficients between soil shear strength indexes and soil density, soil water content, root dry weight density"
草地类型 | 土壤物理特性 | 黏聚力 | 内摩擦角 |
---|---|---|---|
轻度放牧草地 | 土壤密度 | 0.797 | 0.101 |
土壤含水率 | 0.715 | -0.052 | |
根系干重密度 | 0.841* | -0.165 | |
禁牧草地 | 土壤密度 | 0.135 | 0.143 |
土壤含水率 | 0.773 | -0.152 | |
根系干重密度 | 0.875* | -0.089 |
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