Study on cultivated low-potassium lettuce (Lactuca sativa L.) in plant factory
Start Page
161
End Page
172
ISBN
978-986-05-8228-4
Date Issued
2018-12
Date
2018-12
Author(s)
Hsin-Ying Chang
Wei Fang
Abstract
Patients with end stage renal disease (ESRD) often experience hyperkalemia, a condition that requires limiting their dietary intake of potassium. Fresh vegetables are the largest source of potassium intake for Taiwanese people, it is vital to provide vegetables with low potassium concentration for ESRD patents. Prior study was conducted in Japan for low-potassium vegetable production, however, some products are low in potassium but high in sodium. The objective of this study was to develop an operating procedure enable to grow low potassium, low sodium and low nitrate lettuces without scarifying too much of the fresh weight. The frill ice lettuces were grown in a plant factory with artificial lighting (PFAL) using hydroponic system with deep flow technique (DFT). The lettuces were grown at environment with average light intensity of 200 μmol m-2s-1, light period of 16 hours, day/night temperatures of 25/20°C and carbon dioxide concentration of 1,200 ppm. The Yamasaki solution was used, termed 100% potassium as the control group and the growing period from sowing to harvest was 42 days. For the treatment group, potassium ions were removed during the treatment period (measured in weeks) varied prior to harvest. Two procedures were developed for growing frill ice lettuce. The 1st can reduced potassium content by approximately 90%, however, the fresh weight also reduced by 48%. The 2nd can reduced potassium content by 57.7 % and reduced fresh weight by only 4.7%. This study shows the potential of producing low potassium (< 90), low sodium (< 25) and low nitrate (< 2500) frill-ice lettuce in a PFAL.
Event(s)
產業現況及研究發展國際設施研討會
Subjects
End Stage Renal Disease
Hyperkalemia
Hydroponics
Nitrate
Sodium
Potassium
Publisher
農業試驗所
Type
book part
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no214-23.pdf
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221.93 KB
Format
Adobe PDF
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