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As shown by the changes in physiological characteristics and seed vigor of three Medicago ruthenica samples during artificial aging process, the germination potential, germination rate, germination index, vigor index and simple vigor index declined with the extension of aging time on the whole. After artificial aging for 6 min, the vigor was higher than that of the control. The conductivity, malondialdehyde content and soluble polysaccharide content of seed leachate increased with the aging time and negatively correlated (P<0.05) with the seed vigor indicators. The physiological indicators were very significantly correlated (P<0.01) with the vigor indicators in the Medicago ruthenica sample from Dorbod Qi, Ulanqab City(China).
As shown by the changes in physiological characteristics and seed vigor of three Medicago ruthenica samples during artificial aging process, the germination potential, germination rate, germination index, vigor index and simple vigor index declined with the extension of aging time on the whole. aging for 6 min, the vigor was higher than that of the control. The conductivity, malondialdehyde content and soluble polysaccharide content of seed leachate increased with the aging time and negatively correlated (P <0.05) with the seed vigor indicators. very significantly correlated with the vigor indicators in the Medicago ruthenica sample from Dorbod Qi, Ulanqab City (China).