科尔沁沙地沙漠化过程中土壤有机碳含量变化特征及影响因素
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闫蒙, 王旭洋, 周立业, 李玉强
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Characteristics and influencing factors of soil organic carbon in the process of desertification in Horqin Sandy Land
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Meng Yan, Xuyang Wang, Liye Zhou, Yuqiang Li
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表5 不同土层土壤有机碳与土壤因子主成分( F )分析
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Table 5 Principal component analysis of soil organic carbon and environmental factors in different soil layers
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变量 | 0—10 cm | 10—20 cm |
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F1 | F2 | F3 | F1 | F2 | F3 |
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土壤全氮含量 | 0.853 | -0.166 | -0.299 | 0.807 | -0.254 | -0.142 | 土壤全磷含量 | 0.897 | -0.110 | -0.261 | 0.801 | -0.105 | -0.226 | 土壤容重 | -0.107 | 0.431 | 0.032 | -0.059 | 0.287 | 0.547 | pH值 | 0.510 | 0.089 | 0.816 | 0.607 | 0.004 | 0.577 | 电导率 | 0.791 | -0.035 | 0.340 | 0.632 | -0.211 | 0.535 | 粗砂 | 0.136 | 0.814 | -0.125 | 0.150 | 0.754 | 0.113 | 中砂 | 0.013 | 0.865 | -0.052 | -0.100 | 0.840 | -0.040 | 细砂 | -0.777 | -0.533 | 0.117 | -0.628 | -0.705 | 0.237 | 极细砂 | 0.732 | -0.072 | 0.158 | 0.755 | -0.025 | 0.074 | 黏粉粒 | 0.793 | -0.271 | -0.251 | 0.642 | -0.027 | -0.450 | 特征值 | 4.215 | 2.008 | 1.061 | 3.475 | 1.976 | 1.268 | 解释变量/% | 42.148 | 20.075 | 10.612 | 34.755 | 19.761 | 12.678 | 累计解释变量/% | 42.148 | 62.223 | 72.835 | 34.755 | 54.515 | 67.193 |
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