土壤侵蚀对紫色土坡耕地耕层物理及力学特性的影响

江娜,史东梅,蒋光毅,宋鸽,司承静,叶青

Effects of Soil Erosion on Physical and Mechanical Properties of Cultivated Layer of Purple Soil Slope Farmland

Na JIANG,DongMei SHI,GuangYi JIANG,Ge SONG,ChengJing SI,Qing YE

表6 紫色土坡耕地耕层土壤退化指标统计分析特征

Table 6 Statistical analysis of soil degradation indicators of cultivated land in purple soil slope

评价指标 Evaluation index 初始 入渗率 Initial soil infiltration (mm·min-1) 稳定入渗率 Stable infiltration rate (mm·min-1) 平均入渗率 Average infiltration rate (mm·min-1) 饱和导水率 Saturated hydraulic conductivity (mm·min-1) 抗剪强度 Soil shear strength (kPa) 土壤紧实度 Soil compactibility (N·cm2) 土壤 容重 Soil bulk density (g·cm-3) 土壤总 孔隙度 Soil total porosity (%) 毛管孔隙度 Soil capillary porosity (%) 粉粒 Silt (%) 砂粒 Sand (%) 黏粒 Clay (%) 最大值 Maximum value 70.75 13.29 39.29 4.00 3.84 251.50 1.58 52.33 36.29 66.67 36.77 32.33 最小值 Minimum value 13.00 8.42 16.00 0.25 1.96 49.98 1.26 40.38 7.95 49.00 16.67 14.33 平均值 Average value 37.79 10.30 27.04 1.86 2.97 96.06 1.43 46.19 30.58 55.39 29.62 22.9 标准差 Standard deviation 13.92 1.31 5.75 1.17 0.61 46.25 0.10 3.91 6.29 4.61 5.03 5.81 变异系数 Coefficient of variation (%) 36.84 12.71 21.27 63.03 20.56 48.15 7.31 8.47 20.56 8.31 17.00 25.37 峰度Kurtosis 0.46 0.02 -0.12 -0.83 -1.27 6.09 -1.38 -1.39 8.87 0.41 0.89 -1.26 偏度Skewness 0.43 0.60 0.03 0.15 -0.2 2.09 0.13 -0.13 -2.74 0.69 -0.74 0.06 K-S检验 K-S test 0.20 0.20 0.20 0.11 0.20 0.08 0.15 0.14 0.22 0.20 0.20 0.20 Norm值 Norm value 3.04 2.70 3.03 2.94 2.81 2.73 2.94 2.94 2.53 2.44 2.66 2.80