Abstract:

Aimed to provide theoretical reference for selecting salt tolerant maize varieties, cultivating maize on saline-alkali soil and breeding salt tolerant species. In this study, 9 different kinds inbred lines of maize (Zea mays L.) were treated with different concentrations of NaCl solution. Germination energy, germination rate, the length of buds and roots were used as indicators to identify and classify the salt stress tolerance in the germination period. Results showed: 30 mmol/L NaCl treatment, rootlength of ‘Jidan519’ and ‘Pingquan 9’ was 31.17% and 14.17% higher than 0 mmol/L treatment, P<0.05. The study showed that the seedlings were promoted when concentration of NaCl (≤30 mmol/L)was comparatively low, germination rate,the length of buds and roots were increased. All the indicators reveal that ‘Jidan 519’ and ‘Xianyu 335’ have a wider salt resistance, so we suggest these varieties can be widely planted in higher salinity soil.