天津蔬菜主产区土壤中镉的有效性及关键调控因子研究

谢薇, 杨耀栋, 侯佳渝, 菅桂芹, 李国成, 赵新华

Availability and key regulator of cadmium in soil of main vegetable production areas in Tianjin

Wei XIE, Yao-Dong YANG, Jia-Yu HOU, Gui-Qin JIAN, Guo-Cheng LI, Xin-Hua ZHAO

表2 主成分分析特征及其贡献率

Table 2 Eigenvalues and proportion of principal component analysis

主成分 特征值 贡献率/% 累积贡献率/% 1 3.634 45.43 45.43 2 1.560 19.49 64.92 3 1.023 12.79 77.71 4 0.601 7.51 85.22 5 0.502 6.28 91.50 6 0.443 5.54 97.04 7 0.177 2.21 99.25 8 0.060 0.76 100.00