基于3种空间预测方法的黄土区土壤颗粒组成空间分布研究—以宁夏海原县为例

申哲,张认连,龙怀玉,王转,朱国龙,石乾雄,喻科凡,徐爱国

Research on Spatial Distribution of Soil Particle Size Distribution in Loess Region Based on Three Spatial Prediction Methods—Taking Haiyuan County in Ningxia as an Example

SHEN Zhe,ZHANG RenLian,LONG HuaiYu,WANG Zhuan,ZHU GuoLong,SHI QianXiong,YU KeFan,XU AiGuo

表4 土壤颗粒组成逐步线性回归方程拟合结果

Table 4 Fitting of soil particle size distribution with the stepwise linear regression equation

粒级Soil particle 方程Equator 调整决定系数Adjusted R2 概率Probability 砂粒 Slr-sand slr-sand=0.160-0.140Ele+0.875ST1 0.339 <0.001 粉粒 Slr-silt slr-silt=-0.070+0.097Ele+0.811ST2 0.208 <0.001 黏粒 Slr-clay slr-clay=-0.054+0.042Ele+0.945ST3 0.205 <0.001