The present invention addresses the problem of providing a fertilizer absorption improvement method that makes it possible to conveniently improve fertilizer absorption. This fertilizer absorption improvement method involves applying nano-bubble water to a plant.本發明的課題在於提供一種可藉由簡便的操作而實現肥料吸收率的提升的肥料吸收率的提升方法。本發明的肥料吸收率的提升方法為將奈米氣泡水施用於植物體的肥料吸收率的提升方法。