Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (12): 38-49.DOI: 10.11686/cyxb2020315
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Peng-peng ZHOU(), Ying-ge SHU(), Zhong-liu CHEN, Qing-song CHEN
Received:
2020-07-06
Revised:
2020-08-25
Online:
2020-12-28
Published:
2020-12-28
Contact:
Ying-ge SHU
Peng-peng ZHOU, Ying-ge SHU, Zhong-liu CHEN, Qing-song CHEN. Chemical weathering characteristics of calcareous soil under different land-use patterns in a Karst mountainous area[J]. Acta Prataculturae Sinica, 2020, 29(12): 38-49.
土地利用方式 Land use patterns | 地理位置 Geographical position | 海拔 Elevation (m) | 坡度 Slope (°) | 采样数 Hits | 主要植被 Major vegetation | 植被覆盖率 Vegetation coverage (%) | 岩石裸露率 Rock exposure rate (%) |
---|---|---|---|---|---|---|---|
耕地 Cultivated land (CL) | 25°49′56″-25°50′11″ N 105°11′57″-105°12′47″ E | 1501~1591 | 14~23 | 21 | 玉米Zea mays;烤烟Nicotiana tabacum | - | 28.50 |
荒草地 Wild grass land (WGL) | 25°49′47″- 25°50′10″ N 105°11′26″-105°12′05″ E | 1503~1577 | 20~28 | 47 | 蕨P. aquilinum;三叶草T. repens | 52.00 | 58.50 |
退耕还草地 Returning farmland to grassland (RFL) | 25°49′55″- 25°51′08″ N 105°11′26″-105°12′05″ E | 1307~1520 | 25~40 | 88 | 青蒿A. carvifolia;皇竹草P. sinese;三叶草T. repens | 72.45 | 27.56 |
林草间作地 Forest and grass intercropping (FGL) | 25°49′54″- 25°50′10″ N 105°11′37″-105°12′04″ E | 1519~1557 | 26~40 | 43 | 楸树C. bungei;三叶草T. repens;青蒿A. carvifolia | 52.58 | 46.12 |
Table 1 Basic description of soil sampling points
土地利用方式 Land use patterns | 地理位置 Geographical position | 海拔 Elevation (m) | 坡度 Slope (°) | 采样数 Hits | 主要植被 Major vegetation | 植被覆盖率 Vegetation coverage (%) | 岩石裸露率 Rock exposure rate (%) |
---|---|---|---|---|---|---|---|
耕地 Cultivated land (CL) | 25°49′56″-25°50′11″ N 105°11′57″-105°12′47″ E | 1501~1591 | 14~23 | 21 | 玉米Zea mays;烤烟Nicotiana tabacum | - | 28.50 |
荒草地 Wild grass land (WGL) | 25°49′47″- 25°50′10″ N 105°11′26″-105°12′05″ E | 1503~1577 | 20~28 | 47 | 蕨P. aquilinum;三叶草T. repens | 52.00 | 58.50 |
退耕还草地 Returning farmland to grassland (RFL) | 25°49′55″- 25°51′08″ N 105°11′26″-105°12′05″ E | 1307~1520 | 25~40 | 88 | 青蒿A. carvifolia;皇竹草P. sinese;三叶草T. repens | 72.45 | 27.56 |
林草间作地 Forest and grass intercropping (FGL) | 25°49′54″- 25°50′10″ N 105°11′37″-105°12′04″ E | 1519~1557 | 26~40 | 43 | 楸树C. bungei;三叶草T. repens;青蒿A. carvifolia | 52.58 | 46.12 |
指标 Index | 层次 Level (cm) | 样本数 No. of samples | 极小值 Min (g·kg-1) | 极大值 Max (g·kg-1) | 均值 Mean (g·kg-1) | 标准差 SD (g·kg-1) | 变异系数 CV (%) |
---|---|---|---|---|---|---|---|
SiO2 | 0~10 | 72 | 184.89 | 571.74 | 381.73a | 70.08 | 18.36 |
10~20 | 72 | 202.42 | 588.75 | 390.01a | 74.19 | 19.02 | |
20~40 | 45 | 207.33 | 629.07 | 400.92a | 89.22 | 22.25 | |
40~60 | 10 | 289.77 | 650.22 | 400.96a | 106.30 | 26.51 | |
Al2O3 | 0~10 | 72 | 74.33 | 199.14 | 137.88b | 24.83 | 18.01 |
10~20 | 72 | 81.46 | 240.44 | 144.63b | 28.67 | 19.82 | |
20~40 | 45 | 93.85 | 212.16 | 147.34ab | 29.97 | 20.34 | |
40~60 | 10 | 115.52 | 205.70 | 160.25a | 24.39 | 15.22 | |
Fe2O3 | 0~10 | 72 | 30.85 | 131.28 | 83.07a | 16.27 | 19.58 |
10~20 | 72 | 42.43 | 121.96 | 88.29a | 14.50 | 16.42 | |
20~40 | 45 | 50.97 | 124.51 | 87.77a | 14.30 | 16.29 | |
40~60 | 10 | 72.87 | 97.38 | 84.66a | 7.13 | 8.43 | |
CaO | 0~10 | 72 | 3.44 | 22.67 | 10.73a | 4.96 | 46.25 |
10~20 | 72 | 3.79 | 22.13 | 10.00ab | 4.32 | 43.22 | |
20~40 | 45 | 3.17 | 20.30 | 9.63ab | 3.82 | 39.65 | |
40~60 | 10 | 6.04 | 10.35 | 7.98b | 1.31 | 16.36 | |
MgO | 0~10 | 72 | 9.48 | 24.95 | 13.93a | 3.51 | 25.21 |
10~20 | 72 | 9.37 | 26.17 | 14.34a | 3.82 | 26.62 | |
20~40 | 45 | 9.88 | 24.71 | 15.19a | 3.55 | 23.37 | |
40~60 | 10 | 10.07 | 22.81 | 14.83a | 3.75 | 25.27 | |
MnO | 0~10 | 72 | 0.91 | 4.22 | 2.48a | 0.88 | 35.26 |
10~20 | 72 | 1.04 | 4.43 | 2.54a | 0.89 | 35.07 | |
20~40 | 45 | 1.06 | 4.43 | 2.33a | 0.92 | 39.39 | |
40~60 | 10 | 1.04 | 4.27 | 2.47a | 1.04 | 42.19 | |
P2O5 | 0~10 | 72 | 1.55 | 4.97 | 3.02a | 1.01 | 33.33 |
10~20 | 72 | 1.34 | 5.12 | 2.78a | 1.04 | 37.54 | |
20~40 | 45 | 1.40 | 5.11 | 2.60ab | 1.01 | 38.99 | |
40~60 | 10 | 1.55 | 2.96 | 2.17b | 0.55 | 25.18 | |
K2O | 0~10 | 72 | 4.98 | 17.39 | 11.73a | 2.32 | 19.83 |
10~20 | 72 | 5.22 | 18.58 | 12.17a | 2.56 | 21.02 | |
20~40 | 45 | 5.39 | 31.96 | 12.45a | 4.09 | 32.80 | |
40~60 | 10 | 4.81 | 13.29 | 8.88b | 2.60 | 29.26 | |
Na2O | 0~10 | 72 | 1.13 | 9.14 | 3.47a | 1.41 | 40.71 |
10~20 | 72 | 0.82 | 6.41 | 3.32a | 1.23 | 37.19 | |
20~40 | 45 | 1.10 | 7.99 | 3.60a | 1.22 | 33.84 | |
40~60 | 10 | 2.41 | 5.44 | 4.13a | 1.26 | 30.60 |
Table 2 Classical descriptions of soil mineral element contents in Karst mountainous area profiles
指标 Index | 层次 Level (cm) | 样本数 No. of samples | 极小值 Min (g·kg-1) | 极大值 Max (g·kg-1) | 均值 Mean (g·kg-1) | 标准差 SD (g·kg-1) | 变异系数 CV (%) |
---|---|---|---|---|---|---|---|
SiO2 | 0~10 | 72 | 184.89 | 571.74 | 381.73a | 70.08 | 18.36 |
10~20 | 72 | 202.42 | 588.75 | 390.01a | 74.19 | 19.02 | |
20~40 | 45 | 207.33 | 629.07 | 400.92a | 89.22 | 22.25 | |
40~60 | 10 | 289.77 | 650.22 | 400.96a | 106.30 | 26.51 | |
Al2O3 | 0~10 | 72 | 74.33 | 199.14 | 137.88b | 24.83 | 18.01 |
10~20 | 72 | 81.46 | 240.44 | 144.63b | 28.67 | 19.82 | |
20~40 | 45 | 93.85 | 212.16 | 147.34ab | 29.97 | 20.34 | |
40~60 | 10 | 115.52 | 205.70 | 160.25a | 24.39 | 15.22 | |
Fe2O3 | 0~10 | 72 | 30.85 | 131.28 | 83.07a | 16.27 | 19.58 |
10~20 | 72 | 42.43 | 121.96 | 88.29a | 14.50 | 16.42 | |
20~40 | 45 | 50.97 | 124.51 | 87.77a | 14.30 | 16.29 | |
40~60 | 10 | 72.87 | 97.38 | 84.66a | 7.13 | 8.43 | |
CaO | 0~10 | 72 | 3.44 | 22.67 | 10.73a | 4.96 | 46.25 |
10~20 | 72 | 3.79 | 22.13 | 10.00ab | 4.32 | 43.22 | |
20~40 | 45 | 3.17 | 20.30 | 9.63ab | 3.82 | 39.65 | |
40~60 | 10 | 6.04 | 10.35 | 7.98b | 1.31 | 16.36 | |
MgO | 0~10 | 72 | 9.48 | 24.95 | 13.93a | 3.51 | 25.21 |
10~20 | 72 | 9.37 | 26.17 | 14.34a | 3.82 | 26.62 | |
20~40 | 45 | 9.88 | 24.71 | 15.19a | 3.55 | 23.37 | |
40~60 | 10 | 10.07 | 22.81 | 14.83a | 3.75 | 25.27 | |
MnO | 0~10 | 72 | 0.91 | 4.22 | 2.48a | 0.88 | 35.26 |
10~20 | 72 | 1.04 | 4.43 | 2.54a | 0.89 | 35.07 | |
20~40 | 45 | 1.06 | 4.43 | 2.33a | 0.92 | 39.39 | |
40~60 | 10 | 1.04 | 4.27 | 2.47a | 1.04 | 42.19 | |
P2O5 | 0~10 | 72 | 1.55 | 4.97 | 3.02a | 1.01 | 33.33 |
10~20 | 72 | 1.34 | 5.12 | 2.78a | 1.04 | 37.54 | |
20~40 | 45 | 1.40 | 5.11 | 2.60ab | 1.01 | 38.99 | |
40~60 | 10 | 1.55 | 2.96 | 2.17b | 0.55 | 25.18 | |
K2O | 0~10 | 72 | 4.98 | 17.39 | 11.73a | 2.32 | 19.83 |
10~20 | 72 | 5.22 | 18.58 | 12.17a | 2.56 | 21.02 | |
20~40 | 45 | 5.39 | 31.96 | 12.45a | 4.09 | 32.80 | |
40~60 | 10 | 4.81 | 13.29 | 8.88b | 2.60 | 29.26 | |
Na2O | 0~10 | 72 | 1.13 | 9.14 | 3.47a | 1.41 | 40.71 |
10~20 | 72 | 0.82 | 6.41 | 3.32a | 1.23 | 37.19 | |
20~40 | 45 | 1.10 | 7.99 | 3.60a | 1.22 | 33.84 | |
40~60 | 10 | 2.41 | 5.44 | 4.13a | 1.26 | 30.60 |
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