Consequently, ion balance was broken. The content of Na~+, Na~+/K~+, Na~+/Ca~(2+), Na~+/Ca~(2+), SNa~+,K~+ and SNa~+,Ca~(2+) at seedling stage basically reflected the salt-tolerance of plant and might be suitable to select salt-tolerant pumpkin variety.

• 南瓜幼苗体内Na~+含量、Na~+/K~+、Na~+/Ca~(2+)、S_(Na~+,K~+)和S_(Na~+,Ca~(2+))比值基本能够反映植物耐盐性的强弱,可以作为鉴定南瓜幼苗耐盐性鉴定指标。