KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Development of Recirculating Wick Hydroponic Techniques for Safe Seed Tuber Multiplication of Potatoe

심지 양액재배법에 의한 상위급 씨감자의 안정적 대량생산

  • Kang Bong Kyoon (College of Agric. & Life Sci., Cheju National Univ.) ;
  • Kim Chan Woo (College of Agric. & Life Sci., Cheju National Univ.)
  • 강봉균 (제주대학교 농업생명과학대학) ;
  • 김찬우 (제주대학교 농업생명과학대학)
  • Published : 2004.12.01
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Abstract

This study was conducted to establish the proper techniques of the recirculating wick hydroponics for safe seed tuber proliferation of potatoes (Solanum tuberosum L. CV. Dejima). To achieve these, several intact tubers (5, 10 and 20 g) and cut seed-pieces (two or four) were treated in wick hydroponic system beds. A polystyrene box (31cm in width, 20cm in height, 51cm in length, and $0.031m^3$ in volume) was placed on a styrofoam hox. Eight wicks $(width\;1.5cm\;{\times}\;length\;40cm) $ were put into each polystyrene hox and the boxes were filled with perlite + peatmoss (1 : 2, v/v) medium. Top fresh weight per plant increased with increasing the tuber size from 10 to 30g/tuber. As the tuber size increases from 10 to 30 g/tuher in case of uncut tuber, the marketable tuber (>5g) production per plant increased from 83.8 to 141.8 g/plant and the marketable tuber (>5g) production per plant of cut tuber was slightly higher than that of uncut treatment. Total tuber yield ranged from 4.16 to $6.56kg/m^2$ and the percentage of seed tubers was greater than $97\%$ for all treatments. These results indicate that seed tuber should be cut to produce large tuber $(\geq10g)$ in the recirculating wick hydroponic system.

분무경 양액재배로 얻어진 비절단씨감자 및 $2\~4$절 절단씨감자를 심지양액재배상에 파종하여 생육 및 수량형질변화를 조사함으로서 상위급 씨감자의 안정적 대량생산가능성을 조사하였다. 감자 심지 양액재배시스템은 순환식으로 4열 2조로 제작하였으며, 성형베드 안쪽에 크기가 $31(W)\times20(D)\times51(L)cm$인 폴리스티렌상자$(0.031m^3)$를 올려놓고 그 안에 8개의 심지(폭 1.5cm, 길이 40cm)를 꼽고 porlite+peatmoss(1:2, v/v) 배지를 채운 후 식물을 재배할 수 있도록 하였다. 지상부 주당생체중은 씨감자의 절편무게가 10g에서 30g으로 증가할수록 생체중도 증가하였다. 종서로 이용이 가능한 주당상품괴경수량(5g 이상)은 비절단씨감자의 무게가 증가할수록 82.3g에서 140.1g으로 무거워졌고, 절단씨감자처리는 10g 4절 처리를 제외한 모든 시험구에서 5g 비절단씨감자 처리와 비슷하거나 많았으며, 20g 2절과 30g 2절, 4절 처리가 100g내외의 괴경수량을 보였다. 절단씨감자 처리는 $m^2$당 총괴경수량이 $4.16\~6.56kg$범위에 있었고, 절편무게가 7.5g 이상(20g 2절 및 30g 2절, 4절)은 5.6kg 이상의 총괴경수량을 보였으며, 주당상품괴경수량(5g이상)의 비율은 모든 처리에서 $97\%$ 이상으로 높게 나타났다. 결론적으로 분무경 양액재배의 단점을 보완할 수 있는 심지 양액재배시 분무경으로 생산한 $10\~20g$크기의 소괴경은 2절로, 20g이상의 소괴경은 4절로 각각 5g내외로 절단하여 이용할 경우 상위급 씨 감자의 친환경적인 대량생산이 가능할 것으로 판단된다.

Keywords

References

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