Research on Method of Seed Quality Inspection and Seed Grading Standard of Rubia cordifolia L.
The quality inspection methods of Rubia cordifolia L.seeds were studied according to the Chinese Crop Seed Inspection Regulations,in order to provide the basis for formulating scientific and reasonable seed classification standards.The seed mass was determined by the hundred-grain meth-od,and the 1 000-grain weight was 11.613 9 g.The soaking time of madder seed was set to 11 hours.The water content of the seeds was determined by crushing at high temperature(130±2)℃.Sand was selected for germination bed during seed germination.Freezing treatment was used as the pre-treat-ment of Rubia cordifolia L.seeds,and 24 hours total darkness at 20 ℃ was used as the light condi-tion for germination of Rubia cordifolia L.seeds.With TTC concentration of 0.3％,dyeing time of 12 hours and dyeing temperature of 35 ℃,the viability of seeds could be well determined and the germi-nation potential of Rubia cordifolia L.seeds could be quickly detected.
Rubia cordifolia L.seedsquality inspectiongrading standard
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