An object of the present invention while a relatively small amount of usage of silver also , I want to provide a novel cut flowers life extension agents that can effectively improve the retention cut flowers flowers . A After immersing the carrier in an aqueous solution of a silver salt , by reducing silver active carrier 2 the coating is formed of silver (Ag) on the surface of the carrier , is supported on a substrate , or , and a is inherent in the container or bag material 3 . [ Selection Figure Figure 1【課題】銀の使用量が比較的少量でありながらも、切り花の花持ちを効果的に向上し得る新規な切り花延命剤を提供する。【解決手段】銀塩の水溶液に担体を浸漬した後、還元することによって、前記担体の表面に銀(Ag)の被膜が形成されてなる銀活性担体2が、基材に担持され、又は、容器若しくは袋材3に内在されてなる。【選択図】図1
