Cucumber (Cucumis sativus L.) is one of the economically important vegetables. Silicon (Si) and selenium (Se) are beneficial elements for plant growth and development. However, their effects on the quality of cucumber fruit have not been comprehensively investigated. Moreover, the combined effects of these two elements on cucumber growth, yield and fruit quality remain unclear. In this study, the plants of cucumber ‘Jinyou 315′ were foliar-sprayed with Si (1 mM) and Se (0.025 mM) separately or in combination, and their effects on the growth, yield and fruit quality were investigated. The results showed that Si and Se application individually or in combination enhanced the photosynthesis, growth and yield of cucumber. Application of Si and Se respectively increased their concentrations, and accumulations of soluble sugars and amino acids in the fruit. Se addition increased the total organic acid accumulation by enhancing the levels of citric acid, malic acid and oxalic acid. In addition, added Si increased the vitamin C concentration in the fruit, while added Se increased the concentrations of total phenolics and flavonoids and decreased nitrate accumulation. These results suggest that application of Si and Se individually or in combination enhanced cucumber growth, yield and nutritional quality, and the combined effect of Si and Se was more obvious than their individual applications. This study may provide a theoretical basis for application of Si and Se in high quality cucumber production.

黄瓜（Cucumis sativusL.) 是重要的经济蔬菜之一。硅 (Si) 和硒 (Se) 是对植物生长发育有益的元素。然而，它们对黄瓜果实品质的影响尚未得到全面研究。此外，这两种元素对黄瓜生长、产量和果实品质的综合影响尚不清楚。本研究分别或联合对黄瓜'金优315'植株进行了叶面喷施Si (1 mM)和Se (0.025 mM)，研究了它们对生长、产量和果实品质的影响。结果表明，单独或联合施用Si和Se可增强黄瓜的光合作用、生长和产量。Si和Se的施用分别增加了它们的浓度，以及果实中可溶性糖和氨基酸的积累。添加硒通过提高柠檬酸、苹果酸和草酸的水平来增加总有机酸的积累。此外，添加Si增加了果实中维生素C的浓度，而添加Se增加了总酚类和黄酮类化合物的浓度并减少了硝酸盐的积累。这些结果表明Si和Se单独或联合施用可促进黄瓜的生长、产量和营养品质，并且Si和Se的联合作用比单独施用更明显。本研究可为硅、硒在优质黄瓜生产中的应用提供理论依据。而添加硒会增加总酚类和黄酮类化合物的浓度并减少硝酸盐的积累。这些结果表明Si和Se单独或联合施用可促进黄瓜的生长、产量和营养品质，并且Si和Se的联合作用比单独施用更明显。本研究可为硅、硒在优质黄瓜生产中的应用提供理论依据。而添加硒会增加总酚类和黄酮类化合物的浓度并减少硝酸盐的积累。这些结果表明Si和Se单独或联合施用可促进黄瓜的生长、产量和营养品质，并且Si和Se的联合作用比单独施用更明显。本研究可为硅、硒在优质黄瓜生产中的应用提供理论依据。