[目的]分析不同盐分处理下南瓜幼苗生长情况,确定合适的南瓜耐盐鉴定评价指标.[方法]采用盐碱土胁迫试验,研究0、0.2％、0.3％、0.4％、0.5％、0.6％、0.7％7个不同盐分处理下南瓜品种出苗时间、相对出苗率、相对株高、相对真叶面积及相对子叶面积的变化.[结果]土壤盐分浓度为0.6％时,南瓜出苗时间明显延迟,出苗率大幅降低.7个处理间相对真叶面积、相对株高平均降幅为9.8％和8.7％,降幅明显.低盐分含量(0.2％)抑制南瓜子叶生长.[结论]相对真叶面积、相对株高可以作为南瓜耐盐鉴定指标.0.6％可以作为土壤盐分胁迫下南瓜萌发期耐盐鉴定浓度.%[ Objective ] Seedling growth of pumpkin under salt stress was analyzed to determine appropriate salt concentration and evaluation indicators of pumpkin. [ Method ] Saline-alkali soil stress of seven salt concentration (0,0. 2% , 0. 3% , 0. 4% , 0. 5% , 0. 6% , 0. 7% ) were adopted to study pumpkin seedling emergence time, the relative germination rate, relative plant height, relative leaf area of different pumpkin breeds. [ Result] In 0.6% , seedling emergence time significantly delayed and relative germination rate greatly reduced. Among the seven treatments, the relative true leaf area and relative plant height significantly reduced on average by 9.8% and 8.7%. Low salt content (0. 2% ) inhibited the growth of pumpkin cotyledons. [ Conclusion] The relative leaf area and relative plant height could be used as a index on identification of salt-tolerant pumpkin. 0.6% could be salt concentration of identification of pumpkin germination under soil salinity stress.
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