Abstract The use of new and cost-effective methods to increase the shelf life and quality of cut flowers, reduce physiological complications, and finaly, the reduction of post-harvest losses has become very important. In this regard, the purpose of the current study was to investigating the application of nanobubble technology and nano-chelated silicon in soilless cultivation on the pre and post-harvest characteristics of roses. The present study was carried out in a factorial split plot experiment in the form of a randomized complete block design with three factors, including two cut rose cultivars (Samurai and Jumilia), application of oxygen nanobubbles (2 and 20 mg.L-1 for 4 minutes every hour) and foliar spraying with nano-chelated silicon (0 and 2 ml.L-1 with an interval of 10 days) in the scientific-research greenhouses of the Faculty of Agriculture of Isfahan University of Technology with three repetitions. In this experiment, the application of all treatments had a positive effect on the flower quality and post-harvest life of flowers. In most cases, the effect of the treatments on the length of the flowering branch, the number and surface of the leaf, the quality of the flower bud, total soluble sugar content, anthocyanin (before and after harvest), leaf nitrogen content, post-harvest life and cell wall thickness were positive. Moreover, the interaction effects of oxygen nanobubble and nano-chelated silicon on the total soluble sugar, cell wall thickness, flower quality and post-harvest life was significant (P < 0.05). The application of nanobubble improved the physiological characteristics and post-harvest life of two cut rose cultivars (cv. ‘Jumilia’ and ‘Samurai’). However, in most cases the increases in measuring traits were more in Samurai compared to Jumilia cultivar, while length and diameter of buds, bud fresh weight, total soluble sugar content, and post-harvest life were more in Jumilia cultivar. Also, the application of nano-chelated silicon improved most of the eva‎luated traits (except length and diameter of buds, bud fresh weight, total soluble sugar content, and post-harvest life) in Samurai compared to Jumilia cultivar. In conclusion, the findings of this research showed a positive effect on the interaction effects of oxygen nanobubble and nano-chelated silicon regardless of the cultivar. However, in most cases the effect of the use of nano-chelated was significant and it can be considered as an indicator treatment in increasing the post-harvest life and the quality of cut flowers.

علي نيك بخت

حامد عالي پور امرائي , مريم حقيقي

نعمت اله اعتمادي شلمزاري , مهران شيرواني جوزداني