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Abstract To evaluate the fresh-keeping effects of nano-silver (NS), a nano-grade bactericide, on cut alstroemeria (Alstroemeria aurantiaca) ‘Spirit’ flowers, their vase life, ornamental quality, floret opening rate and relative fresh mass were investigated by using vase treatments with 1.0, 5.0, and 10.0 mg/L NS solely and combined with 30.0 g/L sucrose. Compared with the control (deionized water), the various NS alone treatments had no significant preservation effects on cut alstroemeria flowers. However, the combination treatments of NS plus 30.0 g/L sucrose could significantly inhibit their flower abscission and leaf yellowing, improve ornamental quality and prolong vase life. Among them, the preservation effects of 1 mg/L NS plus 30.0 g/L sucrose and 5.0 mg/L NS plus 30.0 g/L sucrose were particularly prominent, whose vase lives were 41.7% (13.6 d) and 45.8% (14.0 d) longer than that of the control (9.6 d), respectively. Moreover, the two combination treatments could effectively promote floret opening and maintain high fresh mass. The results indicated that the combination treatments with appropriate concentration of NS and sucrose had positive effects on preservation of cut alstroemeria ‘Spirit’ flowers.
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2023, Vol. 36 
