基于GWR模型的渭北黄土旱塬粮食单产空间分异 及其影响因子分析——以陕西彬县为例
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邱孟龙,曹小曙,周建,冯小龙,高兴川
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Spatial Differentiation and Impact Factors of Grain Yield Per Hectare in Weibei Plateau Based on GWR Model: A Case Study of Binxian County, Shannxi
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QIU MengLong,CAO XiaoShu,ZHOU Jian,FENG XiaoLong,GAO XingChuan
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表2 GWR模型回归参数统计
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Table 2 Statistics of regression parameters of GWR model
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参数 Parameters | 平均值 Mean | 最小值 Minimum | 最大值 Maximum | 上四分位值 Upper quartile | 下四分位值 Lower quartile | 中位数 Median | 相对极差 Relative ranges | 常数项 Intercept | 297.57 | 246.90 | 329.88 | 286.52 | 314.55 | 299.85 | 0.28 | 坡度 Slope | 5.18 | -45.30 | 27.81 | -9.53 | 22.16 | 11.83 | 14.11 | 耕层厚度 Plough layer thickness | 42.30 | 33.35 | 66.25 | 37.63 | 45.30 | 42.05 | 0.78 | 土壤类型 Soil type | -35.94 | -100.74 | 6.57 | -51.11 | -20.31 | -33.44 | 2.99 | 侵蚀程度 Erosion degree | -24.85 | -46.13 | 7.77 | -38.97 | -13.68 | -25.11 | 2.17 | 土壤有机质 Soil organic matter | 225.50 | 172.00 | 311.23 | 189.92 | 254.17 | 220.21 | 0.62 | 地下水埋深 Groundwater depth | -82.94 | -116.71 | -60.55 | -98.08 | -69.51 | -79.40 | 0.68 | 道路密度 Road density | 28.28 | -18.36 | 70.14 | 11.46 | 48.93 | 25.63 | 3.13 | 施肥成本 Cost of fertilization | 168.07 | 93.21 | 185.42 | 162.60 | 178.68 | 175.91 | 0.55 | 粮食单产实测值 Crop yield per unit (kg·hm-2) | 3257.88 | 1775.00 | 4950.00 | 2653.12 | 3893.75 | 3198.75 | 0.97 | 粮食单产预测值 Estimating crop yield per unit (kg·hm-2) | 3254.35 | 1888.21 | 5139.93 | 2773.27 | 3680.76 | 3246.47 | 1.00 | 条件数 Cond | 22.10 | 19.64 | 29.73 | 20.74 | 23.02 | 21.78 | 0.46 | Local R2 | 0.81 | 0.73 | 0.89 | 0.78 | 0.83 | 0.81 | 0.20 | 残差 Residual | 3.53 | -769.77 | 576.19 | -172.61 | 160.68 | 19.67 | 381.29 |
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