Study on the Characteristic of Electrical Impedance Spectroscopy of Soybean Seeds and the Detection of Seed Viability

Fast, non-destructive, and low cost detection of seed viability is important for seed storage and agricultural production. The present study analyzed the electrical impedance characteristics of soybean seed and investigated the feasibility of detecting seed viability by electrical impedance spectroscopy (EIS). Seeds were processed by two method- boiling, high temperature and humidity processing. Two different impedance analyzer were separately adopted, and the frequency ranges were 100Hz-700KHz and 60KHz-2MHz, respectively. The results of experiments demonstrated that EIS could reflect the change of seed internal structure and thus detect seed viability. The impedances of non-viable seeds were less than that of viable seeds, and the curve radiuses of viable seeds were larger than that of non-viable seeds. Preliminary results of this study indicated that EIS could reflect the degree of seed viability. It’s promising to realize the fast and non-destructive detection of single soybean seed viability based on EIS.