基于MGWRK的土壤有机质制图及驱动因素研究

乔磊,张吴平,黄明镜,王国芳,任健

Mapping of Soil Organic Matter and Its Driving Factors Study Based on MGWRK

Lei QIAO,WuPing ZHANG,MingJing HUANG,GuoFang WANG,Jian REN

表2 模型多重共线性检验

Table 2 Model multicollinearity test

指标Index 容差 Tolerance VIF 坡向Aspects (°) 0.993 1.007 坡度Slope (°) 0.548 1.824 年均降水量Annual mean precipitation (mm) 0.514 1.944 年平均温度Annual mean temperature (℃) 0.417 2.400 海拔Height (m) 0.670 1.493 植被年总初级生产力Gross primary productivity (kgC·m-2) 0.216 4.636 年蒸散量Evapotranspiration (mm) 0.194 5.168 地形湿度指数 Topographic wetness index 0.652 1.534 平面曲率Plan curvature 0.928 1.078 汇流动力指数 Stream power index 0.980 1.021 地形指数 Terrain position index 0.730 1.369 地形粗糙指数 Terrain ruggedness index 0.548 1.824 年平均归一化植被指数 The annual NDVI 0.893 1.120