하수오의 우량종묘 생산을 위한 담액수경(湛液水耕) 육묘시 종묘 크기와 양액의 종류가 생육에 미치는 영향
Effect of In vitro Seedling Size and Different Nutrient Solutions in DFT(Deep Flow Technique) System for Good Quality Plant Production of Polygonum multiflorum Thunberg
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초록
하수오(Polygonum multiflorum Thunb.)는 여뀌과에 속하는 초본식물로 동아시아와 북아메리카에자생하고 있다. 하수오는 관상용으로도 이용되며, 한의학에서 뿌리를 약용으로 사용한다. 하지만 월동이 어렵고 노동력 소모가 많아 최근 재배농가가 감소하고 있다. 본 연구에서는 하수오의 우량종묘를 짧은 시간에 대량생산하기 위하여 수경재배에 적합한 양액과 조직배양묘의 크기를 조사하였다. 토양에 적응이 완료된 하수오 종묘는 크기에 따라 Type 1, Type 2 및 Type 3으로 나누어 4종류의 양액에 치상하였다. 치상 후 양액과 종묘에 따른 생육차이를 확인하기 위하여 생육조사를 실시하였다. 생육조사는8주 동안 양액에서 생육시킨 후 줄기길이, 잎 수, 마른 잎 수, 줄기 수, 생체중과 건물중에 대해 측정하였다. 그 결과 양액3에서 Type 1과 Type 2의 뿌리길이는 각각 33.8cm와 29.5cm로 각각 나타났다. 이와 유사한 경향으로 덩굴 길이도 CaCl2가 첨가 된 양액3에서 Type 1과 Type 2가 가장 길게 나타나우수한 생육을 보였다. 이처럼 뿌리가 증대된 종묘는 밭으로 이식 될 때 활착을 도와 우수한 초기생육을 나타낼 것이라 사료된다. 반면 Type 3는 잎끝마름과 고사하는 현상을 보여 추후 양액의 적정농도에대한 추가 실험이 필요할 것이라 사료된다.
Abstract
Polygonum multiflorum Thunb. is a herbaceous plant of Polygonaceae and distribution on EastAsia and North America. P. multiflorum is used as horticultural crops and root is used as atraditional herbal medicine. But recently, farmhouse is reduced because difficult overwinteringand a lot of labors are required. In this study, we have focused on investigation of suitable toseedling size and nutrient solution in deep flow technique system for mass production goodseedling of P. multiflorum. The environmental acclimatization seedling was classified as Type 1,Type 2, and Type 3 according to the size with sowing in four nutrient solution. Growthexperiment was carried out to confirm the growth differences according to the size of seedlingand nutrient solutions. Growth experiment was measuring the stem length, number of leaves, number of dead leaves, number of stem, fresh weight, and dry weight growing after 8 weeks. As a results, root length of Type 1 and Type 2 were 33.8 cm and 29.5 cm at NS3,respectively. Similarly, vine length of Type 1 and Type 2 were best grown up from the NS3with CaCl2. These results were considered that seedling of enlarged root was effective on theearly stage of growth by helping the rooting in the field. On the other hand, it was happenedas tip burn and withered on leaf in Type 3 case and it might be required additional experimentfor the optimal concentration of the nutrient solution.
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