• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.3
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• pp.191-195
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• 2003

This study was conducted in 2001 to develop a technique for mass production of superior seed tuber by using a wick culture system as an alternative plan to solve problems in hydroponic culture of potato. Potato (Solanum tuberosum L. cv. Dejima) plug seedings were planted on a styrofoam bed (volume $0.032\textrm{m}^3$) containing two different media (Jeju scoria + peatmoss and perlite + peatmoss, (1:2, v/v) mixture, respectively). Each bed was equipped with various number of wicks (2, 4, 6, 8 and 10 ea/bed). After harvest, the total porosity of both media was 83-85%. Bulk density of Jeju scoria + peatmoss was higher compared to that of perlit + peatmoss. However, the number of wicks did not influence to the bulk density. Conversely, moisture capacity of Jeju scoria + peatmoss was remarkably greater than that of perlite + peatmoss and was increased from 55 to 70% as elevating number of wicks. Although the number of wicks resulted in the areal growth of plants, the total yield and the weight of tuber were highest at the bed equipped with six wicks in both media.

• Korean Journal of Organic Agriculture
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• v.23 no.2
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• pp.311-322
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• 2015

The study was conducted on growth and yield of potatoes in a wick hydroponic culture as affected by concentration of aqueous extracts in order to develop natural agricultural resources using Persicaria longiseta. Each 500 ml of distilled water (control) and P. blumei extracts (25%, 50%, 75%, and 100%) was applied to potato plants at 5 d intervals from 1 d after potato transplanting. The potatoes with P. blumei extract emerged 1 d earlier and had 0.3 to 0.4 more stem numbers per plant compared with those of control plot. The plant height was higher in plots with P. blumei extract than in control in early stage of potatoes (50 d), but there was no significant difference observed after mid-stage of potatoes (70 and 90 d). The stem diameter and fresh weight of potatoes estimated a higher values in plots with P. blumei extract than in control plots, although there was no statistical difference. The 100% P. blumei extract increased by up to $13.8kg/m^2$ of potato yield. The numbers of tubers in classes of < 5 g and 5 to 30 g per plant did not show a specific trend among experimental treatments while it in class of > 30 g was much higher in plots with P. blumei extract than in control plot. Accordingly, the P. blumei extract had a positive effect on the growth and yield of potatoes, could be applied as of eco-friendly fertilizers