In this study,37 maize varieties were taken as the research object,and seven traits of maize were analyzed,including plant height,SPAD value,fresh weight of plant,leaf length,leaf width,shoot dry weight,and root-shoot ratio.In order to establish an effective evaluation method for Pb tolerance of maize seedlings,the Pb tolerance coefficients of 7 traits of 37 maize varieties were converted into membership function values and D values by principal component and membership function analysis.Then,the Pb tolerance of maize seedlings was divided into five grades:high tolerance,tolerance,medium,sensitivity and high sensitivity through cluster analysis.Finally,the regression equation of D value and Pb tolerance coefficient of seven traits was established by regression analysis:D=-0.784+0.426*plant height+0.178*fresh weight of plant+0.126*shoot dry weight+0.361*SPAD+0.320*leaf length+0.041*leaf width-0.002*root-shoot ratio.The above results provide a basis for the evaluation of Pb tolerance at maizeseedling stage.
维普
万方数据
