Effect of Nutrient Solution Concentration in the Second Half of Growing Period on the Growth and Postharvest Quality of Leaf Lettuce (Lactuca sativa L.) in a Deep Flow Technique System

담액수경재배 시 재배후기 양액농도가 상추의 생장 및 수확후 품질에 미치는 영향

  • Lee, Jung-Soo (National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Chang, Min-Sun (National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 이정수 (농촌진흥청 국립원예특작과학원) ;
  • 장민선 (농촌진흥청 국립원예특작과학원)
  • Received : 2016.05.11
  • Accepted : 2016.11.29
  • Published : 2017.08.28


We examined the effect of nutrient solution concentration in the second half of growing period on the pre- and postharvest characteristics of two leaf lettuce cultivars, 'Geokchima' and 'Cheongchima'. Plants were grown hydroponically in a deep flow technique (DFT) system at different concentrations of National Horticulture Research Institute hydroponic nutrient solution: 1/2 strength (S), 1S, 2S, and 4S. Lettuce leaf growth, number of leaves, and shoot fresh weight of both cultivars were greatest in plants grown in the 1S treatment. Compared to other treatments, pigment and nutrient ion contents were greater in the 4S treatment. Growth of lettuce was greatest in the 1S treatment, and decreased at higher or lower concentrations of nutrient solution. However, postharvest characteristics such as fresh weight loss, leaf chlorophyll level, and external appearance were better in both cultivars when grown in 2S solution. Variations in weight loss and SPAD values were smallest in the 2S treatment. These results show that the optimal nutrient concentration for growth does not necessarily provide the optimal postharvest storability.


Grant : 엽과채류 수출확대 지원 및 손실 개선 상품화 모델 개발, 재배 환경이 채소류의 수확후 품질 및 저장에 미치는 영향

Supported by : 국립원예특작과학원


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