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3 研究区采样点土壤颗粒组成基本统计特征

Table 3 Statistical characters of soil particle size distribution in study area

样本组 Sample group 粒级 Soil particle 样本数 Sample size 最大值 Max (%) 最小值 Min (%) 均值 Mean (%) 标准差 Std. deviation (%) 变异系数 CV (%) 偏度 Skewness 训练集 Calibration sample 砂粒Sand 100 79.18 43.15 61.82 8.67 14.02 -0.04 粉粒 Silt 100 40.40 13.21 23.62 5.66 23.96 0.16 黏粒Clay 100 23.07 7.59 14.56 4.00 27.47 0.24 验证集 Validation sample 砂粒Sand 24 77.49 48.68 63.96 7.23 11.30 -0.34 粉粒 Silt 24 34.06 13.76 22.68 4.97 21.91 0.48 黏粒Clay 24 22.61 8.10 13.36 3.40 25.45 0.72