半干旱区有机质与全氮空间变异的尺度效应特征——以延安市为例
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王鹏, 赵君, 刘拓, 周一凡, 魏锦萍, 王磊
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Scale effects of spatial variations in SOM and STN in semi-arid regions: A case study of Yan'an
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WANG Peng, ZHAO Jun, LIU Tuo, ZHOU Yi-Fan, WEI Jin-Ping, WANG Lei
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表2 有机质和全氮半方差结构异质性分析
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Table 2 Semivariogram heterogeneity analysis of SOM and STN
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指标 | 采样距离/m | 方向/(°) | 拟合模型 | C0 | C0+C | [C0/(C0+C)]/% | 有机质 | 0 | 0 | G | 0.0368 | 0.1286 | 0.2862 | 45 | G | 0.0366 | 0.1287 | 0.2845 | 90 | G | 0.0368 | 0.1287 | 0.2859 | 135 | G | 0.0365 | 0.1286 | 0.2839 | 5000 | 0 | G | 0.0254 | 0.1178 | 0.2156 | 45 | G | 0.0253 | 0.1177 | 0.2149 | 90 | G | 0.0255 | 0.1178 | 0.2164 | 135 | G | 0.0256 | 0.1183 | 0.2164 | 全氮 | 0 | 0 | G | 0.0197 | 0.0698 | 0.2822 | 45 | G | 0.0196 | 0.0696 | 0.2816 | 90 | G | 0.0198 | 0.0698 | 0.2837 | 135 | G | 0.0199 | 0.0699 | 0.2847 | 5000 | 0 | G | 0.0125 | 0.0768 | 0.1628 | 45 | G | 0.0126 | 0.0769 | 0.1640 | 90 | G | 0.0126 | 0.0769 | 0.1642 | 135 | G | 0.0126 | 0.0769 | 0.1633 |
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