关键词: 盐胁迫, 黄瓜, 种子萌发, 幼苗, 霍格兰营养液

Abstract: Pot experiment with soil in greenhouse was employed to investigate the effect of soil soluble salt content on seed germination and seedling growth of cucumber. The results were as follows: the germination percentage， germination index and vigor index of cucumber seeds were not affected by soil soluble salt lower than 3 g·kg-1. Meanwhile， germination percentage， germination index and vigor index of cucumber seeds decreased， when soluble salt content was more than 3 g·kg-1. The seeds almost didnt germinate， when soluble salt content was more than 10 g·kg-1. For seedlings， fresh weight， height， stem diameter and root length were not affected， and the contents of MDA， soluble sugar and proline didnt change significantly， when soil soluble salt content was lower than 3 g·kg-1. When soil soluble salt content was more than 3 g·kg-1， fresh weight， height， stem diameter and root length decreased gradually， and the contents of MDA， soluble sugar and proline of seedlings increased rapidly. There was a significant negative relationship between the germination index of cucumber seeds and the content of soluble salt in soil or soil conductivity， which showed that the condition of germination or seedling growth of cucumber could be forecasted by determination of soil soluble salt content and soil conductivity.

Key words: salt stress, cucumber, seeds germination, seedling, Hoagland solution