감자 양액재배시 소괴경의 생산효율을 높이기 위해 감자 유식물체를 정식후 35일에 10시간 동안 배양액 pH를 3.0, 4.0, 5.0과 6.5로 각각 조절하였을 때 생육상황과 소괴경 수량을 조사한 결과, 소괴경 형성은 pH 3.0 처리구에서 빨랐으며 처리후 20일까지는 유의성있는 증가를 보였다. 배양액 pH가 낮을수록 복지수가 증가되어 괴경수가 많았으며 괴경 건물율도 높았고 정식후 90일째 소괴경 수량은 pH 3.0처리에서 72.1개, pH 4.0에서 69.8개, pH 5.0에서 65.2개, pH 6.5에서 60.3개였다. 3g이상크기의 소괴경의 분포비율은 pH 3.0에서57.9%로 가장 높았으며 pH 5.0과 6.5에서 50.8%로서 가장 낮았다.

The purpose of this study was to evaluate the effect of temporary pH reductions on tuberization of ‘Dejima’potato in aeroponics. The pH and EC of nutrient solution were adjusted to 6.0∼6.5 and 1.2mS/cm, respectively. On 35th day after planting, plants were subjected to pH 3.0, 4.0, 5.0 and 6.5 for 10hrs. After 5 days mini-tuberization was shown in pH 3.0 treatment and was significantly increased up to 20 days. Temporary low pH treatment resulted in the increase of stolen formation and of tuber dry weight. Number of mini-tubers per plant on 90th-day after planting was 72.1, 69.8, 65.2, and 60.3 in pH 3.0, 4.0, 5.0 and 6.5 respectively.

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