| Winter rapeseeds’(Brassica rapa L.) seeds from six cultivars was treated by mixed solution of NaCl and Na2SO4 (mole ratio of 1∶1) to investigate the salt tolerance for screening of salt tolerance winter rapeseed. The concentration of mixed solution included 0 (CK), 45, 90, 135, 180, 240 mmol·L-1. Seed germination and growth parameters were determined. The results showed that salt concentration of 45 mmol·L-1 and 90 mmol·L-1 had little effect on seed germination but 135 mmol·L-1 and 180 mmol·L-1 significantly inhibited the germination of seeds, germination potential, germination rate, germination index, vigor index, length of radicle and plumule, fresh weight and dry weight, indicating that salt concentration of 135～180 mmol·L-1 could be considered as the appropriate concentration of salt resistance identification. Moreover, the salt stress sensitivity of these indicators differenced a lot. Germination index, vigor index, plumule length and fresh weight and salt concentration were negatively correlated, suggesting that they were the most sensitive indicators. The salt tolerance critical value of ky-1, ky-10-191 and ky-NDJ were 133.895, 123.264, 107.399 mmol·L-1, while that of Pingyou 1, 10-191 and NDJ were 117.394, 103.947, 93.834 mmol·L-1, respectively. The former was significantly higher than the latter. Comprehensive evaluation indicated that the salt-tolerance rank of six winter rapeseeds was ky-1>ky-10-191>Pingyou 1>ky-NDJ>10-191>NDJ. |