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Acta Prataculturae Sinica ›› 2017, Vol. 26 ›› Issue (11): 131-138.DOI: 10.11686/cyxb2017002

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Optimized accelerated aging test for common vetch

MO Qing, LÜ Yan-Yan, WANG Yan-Rong*   

  1. State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
  • Received:2017-01-06 Revised:2017-05-12 Online:2017-11-20 Published:2017-11-20

Abstract: Accelerated aging is a common method for seed vigor testing, but the outcome differs with different species. In this study nine seed lots of common vetch (Vicia sativa) were assessed; seeds were aged at 100% relative humidity at 41, 43 and 45 ℃ for 12, 24, 36, 48, 60 and 72 h, respectively. An optimal accelerated aging condition was selected by analyzing germination % and rate of germination. Results indicated that aging temperature, time and their interaction showed significant differences for germination % and germination rate (P<0.01). With increasing temperature and time germination % gradually declined. Germination % decreased significantly after aging for 48 h (P<0.05) (except for seed lot 6). The germination rate increased firstly and then decreased after 24 h. Correlation analysis showed that the effects of aging time on germination % and germination rate were greater than that of temperature. Aging seed for at 41 ℃ for 60 hours was able to separate the seed lots into groups of 8 or 6 based on germination % and germination rate, respectively (P<0.05). We concluded that aging at 41 ℃ for 60 h was the optimal condition for accelerated age testing of common vetch.