Abstract
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.
심지재배방법을 이용하여 감자 상위급종서의 대량생산기술을 개발하고자 경삽플러그묘를 SP2, PP2 2종류의 배지와 5종류의 심지수(폭 1.5cm, 길이 40cm)를 처리한 스치로폼 베드(길이 51${\times}$폭 31.5${\times}$높이 20cm, $0.032\textrm{m}^3$)에 정식, 재배하여 배지의 물리성과 생육형질을 조사한 결과는 다음과 같다. 1. 수확직후 총공극량은 SP2배지와 PP2배지간에 차이가 없이 83-85% 수준이었다. 가비중은 배지별로는 Jeju scoria가 혼용된 SP2배지가 0.27g$.$$\textrm{mL}^{-1}$로 높은 비율을 나타내었으며 심지수간에는 일정한 경향을 보이지 않았다. 2. 수확직후 배지내의 수분함유량은 SP2배지보다 PP2배지가 높았으며 심지수간에는 심지수가 많아질수록 55%에서 70%까지 함량이 많아지는 추세를 보였다. 3. 감자 지상부의 생육형질은 심지수가 많아질수록 증가하는 것으로 나타났다. 4. $1\textrm{m}^2$당 총서중과 괴경평균수량은 SP2배지와 PP2배지 모두 심지수 6개에서 가장 높았다.