山东省广饶县土壤重金属来源、分布及生态风险

周旭, 吕建树

Sources, distribution and ecological risk of soil heavy metals in Guangrao county, Shandong province

Xu ZHOU, Jianshu LV

表5 土壤重金属元素的变异函数模型

Tab. 5 Models for variograms fitting of heavy metals in soils

模型 块金值 (C0) 基台值 (C0+C) 块金值/基台值 (C0/C0+C) 变程 (m) 残差 决定 系数 K-S检验 (Asymp.sig.) As Gaussian 0.006 0.025 0.240 51373 0.201×10-5 0.993 0.021 Cd Exponential 0.005 0.012 0.417 28020 0.199×10-5 0.951 0.016 Co Gaussian 0.034 0.159 0.215 63272 0.111×10-3 0.988 0.327 Cr Gaussian 0.075 0.221 0.340 74253 0.183×10-3 0.977 0.206 Cu Spherical 0.110 0.567 0.194 84178 0.230×10-2 0.957 0.425 Hg Exponential 0.015 0.049 0.317 61470 0.362×10-4 0.958 0.017 Mn Gaussian 0.002 0.014 0.159 728846 0.071×10-5 0.987 0.023 Ni Gaussian 0.091 0.637 0.143 70183 0.647×10-3 0.995 0.331 Pb Gaussian 0.002 0.015 0.127 114974 0.091×10-5 0.940 0.014 Zn Gaussian 0.216 1.457 0.148 92468 0.365×10-2 0.987 0.362