评价指标 | 分组 | PC1 | PC2 | PC3 | PC4 | Norm |
碱解氮 | 1 | 0.826 | −0.187 | 0.008 | 0.203 | 1.89 |
有效磷 | 1 | 0.812 | −0.059 | 0.034 | −0.335 | 1.85 |
脲酶 | 1 | 0.803 | 0.323 | −0.036 | 0.178 | 1.89 |
酸性磷酸酶 | 1 | 0.787 | −0.334 | 0.301 | 0.271 | 1.91 |
全磷 | 1 | 0.785 | 0.473 | −0.121 | −0.184 | 1.94 |
CEC | 1 | 0.779 | 0.248 | 0.123 | −0.073 | 1.80 |
全氮 | 1 | 0.767 | −0.319 | 0.315 | −0.12 | 1.84 |
全钾 | 2 | 0.287 | 0.797 | −0.343 | 0.209 | 1.55 |
蔗糖酶 | 2 | 0.38 | −0.754 | −0.193 | −0.152 | 1.54 |
pH | 2 | −0.122 | 0.734 | 0.441 | 0.354 | 1.41 |
过氧化氢酶 | 3 | 0.106 | 0.141 | 0.797 | −0.138 | 1.06 |
速效钾 | 3 | 0.556 | 0.23 | −0.577 | −0.065 | 1.49 |
有机质 | 4 | 0.193 | −0.563 | −0.119 | 0.69 | 1.25 |
主成分特征值 | - | 5.015 | 2.774 | 1.555 | 1.004 | - |
主成分方差贡献率(%) | - | 38.574 | 21.338 | 11.962 | 7.719 | - |
主成分累积贡献率(%) | - | 38.574 | 59.911 | 71.873 | 79.593 | - |