Storage Technology of Ginkgo Biloba Seed at Normal Atmospheric Temperature

In order to study the storage technology of Ginkgo biloba seed at normal atmospheric temperature, the effects of six kinds of pre-storage methods on the quality and physiological characteristics of stored Ginkgo biloba seeds were studied. The results show that the effect of treatment by immersing the seeds in NaHSO₃ solution with 10 g/L for 1 hour,and then storing at 25℃ for 30 days is the best. The water loss, hardening rate, rottening rate, length of embryo and germination capacity of the seeds treated are 1.02%, 0.52%, 1.36%, 3.5 mm and 92.57%, respectively, while 89.14% of rottening rate and only 6.53% of germination capacity from CK. On the other hand, two chemicals, Sporgon and Imazalil were selected by inhibition zone method as inhibitors towards main pathogenic fungi in post-harvest Ginkgo biloba seeds. Their optimal concentrations were 0.8 g/L and 1.0 g/L, respectively, and their obvious complementarity of inhibiting effect was observed. It was found that when the seeds were treated with mixing 0.8 g/L of Sporgon with 1.0 g/L of Imazalil for 30 minutes and then packed in 0.02 mm thick polyethylene bag at 20℃ for 90 days, the rottening rate was only 2.51%, which was much lower than that treated with one of them alone, but the germination capacity was still 91.24%, hardening rate, water loss and length of embryo were 2.56%, 3.94% and 4.36 mm, respectively. The results also indicated that the other physiological characteristics were all decreasing except for increasing by 37.08% of the lipase activity after the seeds were treated with mixed fungus inhibitor. The respiration intensity (RI) was most significantly decreasing by 69.92%. The vitality of Ginkgo biloba seeds was still strong although the RI of the seeds was inhibited remarkably, and catalase(CAT), pectinesterase(PE), polygalacturonase(PG) were slightly decreasing.