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
邱孟龙,曹小曙,周建,冯小龙,高兴川

Spatial Differentiation and Impact Factors of Grain Yield Per Hectare in Weibei Plateau Based on GWR Model: A Case Study of Binxian County, Shannxi
QIU MengLong,CAO XiaoShu,ZHOU Jian,FENG XiaoLong,GAO XingChuan
表2 GWR模型回归参数统计
Table 2 Statistics of regression parameters of GWR model
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