Reduction of Potassium Content of Hydroponically Grown Turnip and Radish for Assisting Kidney Disease Dialysis Patients’ Diet

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Other Title
  • 腎臓病透析患者に向けた水耕カブおよびハツカダイコンの低カリウム化

Abstract

<p>This study aimed to establish a cultivation method for reducing potassium (K) content rate while maintaining plant growth in turnip and radish, which are root vegetables, for kidney disease dialysis patients with limited K intake. The two treatment groups were reduced K applications throughout the growth period and from the halfway point onwards in hydroponic cultivation. In the turnip, the greatest decrease in K content rate while maintaining plant growth was due to treatment with the K concentration in the hydroponic solution adjusted to 1/10 of the control (potassium concentration;0.3 mM) for 30 days before harvest. This treatment reduced the K content rate by 70.1 % in the hypocotyl and 94.8 % in the leaves and stems compared to the control. In radish, the greatest decrease in K content rate while maintaining plant growth was in the treatment group where no K was added to the hydroponic solution for 15 days before harvest. The K content rate was reduced by 80.0 % in the hypocotyl and 92.2 % in the leaves and stems compared to the control. From these results, it was cleared that cultivating turnip and radish in a hydroponic solution with reduced K during the last 30 % of whole growth period could reduce the crop K content without affecting plant growth.</p>

Journal

  • Shokubutsu Kankyo Kogaku

    Shokubutsu Kankyo Kogaku 35 (1), 7-15, 2023

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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