Method for evaluating cadmium tolerance of sweet sorghum and method for comprehensively evaluating cadmium pollution repair capacity of sweet sorghum

The invention provides a method for evaluating cadmium tolerance of sweet sorghum and a method for comprehensively evaluating cadmium pollution repair capacity of the sweet sorghum, and belongs to the technical field of plant repair. According to the method provided by the invention, the accuracy of evaluation of the Cd repair capability of the sweet sorghum can be improved, one-sided influence caused by a single factor is avoided, and the evaluation result is more objective and accurate. According to the method, each single index of the sweet sorghum variety is converted into three mutually independent comprehensive indexes by adopting principal component analysis, and a Cd resistance comprehensive evaluation value of different varieties in the seedling stage is obtained by utilizing a membership function method for analysis; the Cd-resistant indexes of root dry weight, chlorophyll content, SOD (superoxide dismutase) activity and MDA (malondialdehyde) content screened by the method can effectively reflect th