In order to screen salt-tolerant materials and provide early identification indices of melon,150 mmol/L NO3-solution was used to treat 23 melon germplasms at sprout and seedling stages,and based on subordinate function values and total subordinate function value of salt damage coefficient,the salt tolerance was compared and the salt tolerance identification indexes were screened.The result showed that the responses of different melon germplasms to NO3-stress treatment were obviously different and salt tolerance at sprout and seedling stages was varied.Four salt tolerant materials were the same,which occupied 57.14％ and 25.00％ of salt tolerant materials at sprout stages and seedling stages respectively,and the same rate of salt tolerant and medium salt tolerant materials was 90.00％.Radicle dry weight and main radicle length were screened as salt resistance identification indexes for melon at sprout stages,and stem diameter,root dry weight,strong seedling index,chlorophyll a + b/carotenoids and above ground dry weight could be used as salt resistance appraisal indicators for melon at seedling stage.%为筛选出耐盐性甜瓜材料和提供早期鉴定指标,利用150 mmol/L NO3-对23份甜瓜种质芽苗期和幼苗期进行胁迫处理,以多项指标盐害系数隶属函数值和总隶属函数值为依据,比较了2个时期不同种质的耐盐性,并进行了耐盐性鉴定指标的筛选.结果表明,不同甜瓜种质对NO3-胁迫处理的响应有明显差异,芽苗期和幼苗期耐盐性材料有4份相同,分别占芽苗期和幼苗期耐盐材料的57.14％和25.00％,耐盐和中等耐盐材料相同率为90.00％;并筛选出胚根干质量、主胚根长可作为芽苗期耐盐性鉴定指标,茎粗、根干质量、壮苗指数、叶绿素a+b/类胡萝卜素、地上部干质量可作为幼苗期耐盐性鉴定指标.
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