In order to explore the salt tolerance characteristics of different oil sunflower seeds during germination,three oil sunflower varieties were treated with the same mass concentration of mixed saline-alkali during germination,and their effects on the main germination characteristics of oil sunflower varieties were studied.The results showed that the low concentration of saline-alkali(0.2%,0.4%)reduced the germination rate of oil-producing supreme 909s,s606,and NUS606 to a certain extent;the medium and high concentration of saline-alkali(≥0.6%)decreased the germination rate of all varieties,and the salt damage rate increased with the increase of concentration.Low concentration of compound saline-alkali inhibited the germination of oil sunflower,while high concentration of saline-alkali strongly inhibited the germination of the tested varieties.The tolerance of different varieties to saline-alkali was different.Under low saline-alkali concentration,the performance of s606 was similar and good,and the NUS606 was weak.Under the treatment of medium and high saline-alkali concentration,s606 was better,followed by oil-producing 909s,and NUS606 was weak.
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