Comparative Research on the Testing Methods of Different Seed Vigor in Rice

Purpose The aim of this study was to find one or more inexpensive, uncomplicated, rapid, objective, reproducible, and related to field emergence for rice seeds vigor testing methods.

Method In this study, 8 different type rice varieties as experiment materials, the following tests were used which containing: standard germination test, seedling growth test (the root length and shoot length of 7, 10, 14 days were measured at 25 ℃ and 30 ℃, respectively), radicle emergence test (25 ℃ and 30 ℃), accelerated aging test, cold treatment test and field emergence test.

Results The results of correlation analysis between tests showed that the first cold treatment test, radicle emergence test of 25 ℃ at 96 h (r=0.942) and 30 ℃ at 66 h (r=0.876), and 25 ℃ seedling growth test on the 10 d of shoot length (r=−0.848) and on the 7 d of the shoot length (r=−0.902) were extremely significantly correlated with field emergence. Secondly, the cold treatment test and radicle emergence test of 25 ℃ at 96 h (r=0.913) was extremely significant correlation, and radicle emergence test of 30 ℃ at 66 h (r=0.876) was significantly correlated. The radicle emergence test between 25 ℃ by 96 h count and 30 ℃ by 66 h count was extremely significant correlation (r=0.872).

Conclusion In view of the above results, cold treatment test, the radicle emergence test (25 ℃ by 96 h and 30 ℃ by 66 h count) should be recommendation for a vigor testing methods in rice seeds.