딸기 양액재배에서 고정 양액 조성과 생육단계에 따라 변경한 2단 양액 조성의 생육 및 수량 비교

초록

This study investigated the effects of a single nutrient solution composition and a two-stage nutrient solution composition adjusted according to growth stages on the rhizosphere environment, inorganic ion concentration, plant growth, fruit quality, and yield of hydroponically grown strawberries ‘Seolhyang’ and ‘Kuemsil’. Inorganic ion concentrations in supplied and drainage solutions varied depending on the regime and stage. Under the two-stage regime, the K concentration in the supplied solution was increased during the reproductive stage; nevertheless, drainage K concentration remained similar to that under the single regime. This result implies a potential association between additional K supplied and anticipated K demand during flowering and fruit development. Although supplied Ca concentration was reduced after flowering under the two-stage regime, drainage Ca concentration remained comparable to that under the single regime. This response could possibly be related to Ca that might have remained in the substrate from the vegetative stage, alongside developmental changes in Ca uptake. These patterns indicate that the two-stage regime can balance nutrient supply according to stage-dependent requirements. The two-stage regime promoted plant height and leaf growth from flowering to the mid-harvest period. However, by late harvest, no significant differences were observed in most growth parameters except leaf number. Fruit weight, soluble solids content, and firmness were not significantly affected by the regime. Cumulative marketable yield did not differ between regimes in ‘Seolhyang’, whereas it was significantly higher under the two-stage regime in ‘Kuemsil’. Overall, a two-stage regime can promote early vegetative growth and increase marketable yield in a cultivar-dependent manner without adversely affecting fruit quality and increased marketable yield in ‘Kuemsil’.

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