样品 | 指标 | 观测数 | 均值 | 标准差 | 峰度 | 偏度 | 最小值 | 最大值 | 变异系数 |
Sample | Index | Observation number | Mean value | Standard deviation | Kurtosis coefficient | Skewness coefficient | Min value | Max value | CV |
土壤Soil | Cu | 248 | 0.07 | 0.06 | 3.44 | 1.75 | 0.00 | 0.33 | 88.17 |
Fe | 248 | 61.78 | 27.22 | −0.19 | 0.53 | 10.62 | 140.99 | 44.06 | |
Mg | 248 | 12.02 | 7.57 | 4.05 | 1.80 | 1.18 | 45.84 | 62.95 | |
Mn | 248 | 0.98 | 0.56 | 2.55 | 1.06 | 0.11 | 3.95 | 57.27 | |
Na | 248 | 3.33 | 3.46 | 2.60 | 1.76 | 0.29 | 19.01 | 103.86 | |
Ti | 248 | 6.81 | 4.16 | 3.20 | 1.50 | 0.44 | 26.02 | 61.16 | |
Zn | 248 | 0.11 | 0.05 | 8.06 | 1.68 | 0.02 | 0.43 | 41.02 | |
pH | 248 | 6.21 | 0.92 | −0.82 | 0.02 | 4.28 | 8.25 | 14.82 | |
碱解氮mg/kg | 248 | 74.64 | 46.03 | 4.54 | 1.66 | 7.35 | 295.40 | 61.67 | |
全磷g/kg | 248 | 0.92 | 0.46 | 1.47 | 1.14 | 0.12 | 2.53 | 49.83 | |
速效磷mg/kg | 248 | 42.34 | 36.48 | 7.31 | 2.35 | 3.68 | 235.52 | 86.17 | |
全钾g/kg | 248 | 19.97 | 8.95 | 0.01 | 0.62 | 0.37 | 48.43 | 44.80 | |
速效钾mg/kg | 248 | 273.92 | 163.52 | 1.20 | 1.10 | 34.55 | 862.42 | 59.70 | |
有机质g/kg | 248 | 35.70 | 12.68 | 0.49 | 0.55 | 7.10 | 64.53 | 35.52 | |
氯离子mg/kg | 248 | 12.38 | 3.45 | 0.18 | 0.35 | 5.21 | 21.05 | 27.90 | |
烤烟Flue-cured tobacco | 糠醛 | 248 | 14.56 | 6.31 | 1.31 | −0.70 | 0.10 | 35.97 | 43.36 |
糠醇 | 248 | 1.56 | 0.87 | 0.60 | 0.73 | 0.13 | 4.02 | 56.06 | |
2-乙酰基呋喃 | 248 | 0.68 | 0.24 | 1.00 | −0.88 | 0.04 | 1.17 | 34.91 | |
5-甲基糠醛 | 248 | 1.50 | 0.58 | 0.62 | −1.01 | 0.07 | 2.50 | 38.35 | |
3,4-二甲基- 2,5-呋喃二酮 | 248 | 0.40 | 0.35 | 29.22 | 5.06 | 0.09 | 2.65 | 87.32 | |
2-乙酰基吡咯 | 248 | 0.58 | 0.33 | −0.23 | 0.66 | 0.07 | 1.39 | 56.25 |