• 한국약용작물학회지
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• 제21권2호
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• pp.130-135
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• 2013

The plant growth and yield of Pinellia ternata (Thunb.) Breit. were studied by altitude and tuber weight. The emergence rates in low land area were not different by tuber weights, but it showed earlier emergence date in heavier weight of seed-tuber and low land area. The higher aerial growth such as plant height and number of leaves per plant was the heavier tuber weight in a planting year, but the growth was not different by the weight of tuber at second year after planting. The distribution pattern of tuber size per $m^2$ was not influenced by different seed-tuber weight. The number of harvested tuber was highest at more than 1 g of tuber weight, and followed 1~2 g and less than 2 g. The distribution pattern of fresh tuber yield was not influenced by different altitude and seed-tuber weight. The marketable tuber, 2 g or more, tends to be produced with more than 0.6 g seed-tuber. As the results above-mentioned, it was thought that the high yield was supposed to use seed-tuber over 0.6 g in the fertile soil.

• 한국작물학회지
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• 제44권3호
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• pp.201-206
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• 1999

For the mass production of plug seedlings in cultivar ‘Dejima’ potato (Solanum tuberosum L.) the optimal apical cutting diameter for rooting and rapid multiplication of stem cuttings in hydroponics were determined. In addition, the best planting date was predicted to increase tuber yield of plug seedlings at fall cropping in Cheju-Do, Korea. Days to initial rooting decreased as the cutting diameter was reduced. Plant height, leaf number, root length and root weight per plant were favorable as the cutting diameter was small. The ideal cutting diameter was 1-2 mm in this experiment. In the hydroponic cultures, the Japanese standard (JS) nutrient solution was the most effective for multiplication of stem cuttings. It was able to propagate more than 20 times a month from a single mother plant. Viability of plants, which were derived from plug seedlings using stem cuttings, was excellent when transplanted to the field. The number of tubers and tuber yield in both of the plug seedlings and seed potato planting plots were high when planted on 25 August. The number and yield were reduced when planted on 15 August, 5 September and 15 September. The degree of decrease of tuber yield in the plug seedling planting plot however, was lower than that of seed potatoes when the planting date was late. In the case of small tubers (under 30 g), the number of tubers and tuber yield were evidently increased in the seed potato tuber planting plot; the yield of large tuber (over 80g) in the plug seedling planting plot was higher than that of the seed potato. The total tuber yield per plant in the plug seedling planting plot was less than that of the seed potato; therefore, in order to increase tuber yield it was necessary to increase field plant density.

• 한국작물학회지
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• 제37권2호
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• pp.117-122
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• 1992

본실험은 구약자의 수량증수를 위해 파종기별 저장 방법과 재배양식 절단방법과 자구의 크기, 차광효과를 구명코자 시험하였던바 결과를 요약하면 다음과 같다. 1. 파종기에 있어서 4월 20일 전파종양식에서보다 조기파종 4월 5일이 수량성이 증가하였다. 2. 저장방법시험에서는 일반저장 PC film에서 수량성이 가장 높았고 입모율은 우수하였으나, 반면 구약감자 출현율은 육아재배 PE멀칭과 PE터널에서 20일 촉진할수 있으나 특히 입모율은 주야간 기온차로 특별한 재배관리가 요망된다. 3. 자구절단방법 2절, 4절은 관행보다 자구수가 증가하였고 종자소요량과 대량번식이 유리하였다. 4. 구약감자 재배는 자연광(관행)보다 30%, 50% 차광처리에서 생육특성과 종자수량이 증가하였다.

• 한국작물학회지
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• 제66권4호
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• pp.375-382
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• 2021

For stable cultivation in double cropping, it is important to use potato (Solanum tuberosum L.) cultivars with a short dormancy period of 50-70 days and plant seed tubers of appropriate type and size. An experiment was conducted during 2018-2019 to investigate the effects of seed tuber type and size on growth and yield performance in double cropping. Whole tubers of three sizes (10-20 g, 30-40 g, and 50-60 g) and conventional cut tubers weighing 30-40 g from three cultivars with different dormancy periods, namely 'Daeji' (40-60 days), 'Eunsun' (50-60 days), and 'Saebong' (50-80 days), were planted, and their field performance was compared. Regardless of the cultivar, the increase in the whole tuber weight up to 30-40 g led to fast emergence, thereby increasing ground cover rate, shoot growth rate, and tuber growth rate, which ultimately improved tuber yield by 33-54%. Comparing the whole and cut tubers, 'Daeji' and 'Eunsun' showed similar growth and yield performance; as such, the performance of whole tubers weighing 10-20 g was comparable to that of cut tubers weighing 30-40 g. However, 'Saebong', a cultivar with relatively long dormancy period, performed better with cut tuber than with whole tubers. Based on these results, we recommend the use of whole tubers weighing over 30 g for double cropping. Further studies to break tuber dormancy are warranted in cultivars with relatively long dormancy periods (50-80 days), such as 'Saebong'.

• 한국작물학회지
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• 제47권6호
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• pp.432-436
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• 2002

양액재배산 소괴경의 절단 재배 가능성을 검토하고자 2001년 분무경 양액재배산 괴경을 3, 5, 7, 9, 11, 13g의 절편이 되도록 1(전서), 2, 3, 4개로 절단하여 플러그묘판에서 출아시켜 이식재배한 결과를 요약하면 다음과 같다. 1. 파종 후 35일에 출현율은 절편크기가 7-13g에서 83.0-85.4%, 3, 4절단서 재식구에서 84.0-86.6%로 높았다. 2. 10a당 총서 및 종서규격서 수량은 절편크기가 3g에서 9g으로 증가됨에 따라 10a당 총서수량은 각각 2,052kg과 1,589kg에서 2,924kg과 2,428kg으로 크게 증가되었으나 그 이상 절편의 무게가 증가되었을 때에는 괴경수량의 증가는 크지 않았다. 3. 10a당 총서수량은 전서 재식구에서 1,918kg이었던 것이 3절 절단서 재식구에서 2,982kg로 증가되었고 종서규격서 수량도 전서 재식구에서 1,422kg/10a이었던 것이 3절 절단서 재식구에서 2,579kg으로 증가되었으나 3, 4절 절단서 재식구 간에는 유의한 차이가 없었다. 4. 평균서중은 절편크기가 3g에서 13g으로 증가함에 따라 46.3g에서 71.5g으로 증가되었으며, 전서 및 2절 절단서 재식구의 56.5g과 58.0g보다 3, 4절에서 재식구에서 63.6g과 64.9g으로 무거웠다.

• 한국유기농업학회지
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• 제8권1호
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• pp.89-99
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• 1999

To do mass multiplication of plug seedlings in potatoes, apical stem cuttings originated from virus-free microtubers were cut to one-two internodes and transplanted into the plug-tray. After 10days, we applied Chitosan and Wood Extraction on rooting and tuber formation of plug seedlings. To improve field adaptability of plug seedlings, rooted cuttings with a height of 20cm after 20days of cutting were transplanted ito the fields, We applied 500~2000ppm Chitosan on growth characteristics and tuber formation of that. The above and underground growths, such as plant height and number of leaves were significantly more vigorous after treatment with 500~1,000ppm Chitosan and 2,000ppm Wood Extraction, the spray treatment was carried out five times at intervals of four days after ten days of transplanting. T-N, K, P, Mg and Na, were higher as the concentrations of chitosan and Wood Extraction were higher. The growth and tuber yield in plug seedlings planting plot and seed potatoes planting plot were effectively highter as foliar application of Chitosan(500~2,000ppm) was done after planting the plot. T-N content in leaves and tuber was higher as the concentration of Chitosan was high. A similar tendency was shown in K, P and Mg. In the small tuber(under 30g), the number of tubers and tuber yield were relatively increased in the seed potatoes planting plot, but the large tubers(over 80g) yield was higher in the plug seedlings planting plot, and in order to increase tuber yield in plug seedlings it was necessary to add plant density to the field.

• 한국작물학회지
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• 제48권3호
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• pp.147-151
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• 2003

제주지역에서 상위급 씨감자 가을채종재배 시 폴리에칠렌(PE)멀칭이 감자의 생육 및 수량성에 미치는 효과를 구명하고자 일반종서, 경삽 및 소서 플러그묘를 2001년 8월 20일에 직파 또는 정식한 후 무멀칭, 투명 및 흑색 PE멀칭재배를 하여 얻어진 결과를 요약하면 다음과 같다. 1. 주당 총서수는 멀칭처리에 큰 영향을 받지 않고 4.6개 내외였으나, 종묘종류별로는 직파구에서 5.14개로 가장 많았고 경삽묘 및 소서묘정식구에서는 각각 4.15, 5.15개였다. 2. 총서수량은 무멀칭구에서 21.16톤/ha이었는데, 투명 및 흑색 PE멀칭에 의하여 각각 16, 8% 증수되었고, 경삽묘정식구가 가장 많았으며 다음으로 소서묘, 직파구 순이었다. 3. 평균서중은 무멀칭구에서 평균 72.2g이었고 투명 및 흑색 PE멀칭에 의하여 각각 14, 12%증가되었는데, 멀칭효과는 경삽묘정식구에서 가장 컸었다.

• 한국작물학회지
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• 제46권2호
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• pp.121-124
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• 2001

Potato (Solanum tuberosum L.) tubers of 10, 20, 30, 40, and 50 g were planted in plug trays with vermiculite-based root medium on 10 August 2000 and grown for 15 days in a glasshouse to determine the effects of mini-tuber size on plug seedling growth and field performance of plug seedlings. For a control, common potato tubers weighing 50 g were also planted. As size of seed tubers planted increased from 10 to 50 g, seedling height decreased from 24.6 to 20.0cm while shoot number per seedling increased from 2.0 to 3.5, main stem diameter from 4.3 to 6.1mm, and fresh weight of root + top from 9.3 to 19.4 g/seedling. At 90 days after transplanting plug seedlings, the total number of tubers per plant increased from 3.62 to 4.72, average tuber weight from 62.9 to 72.8g, and total tuber yield 20.5 to 23.6 t/ha with increase in seed tuber size. Plug seedlings raised from 50g tubers produced 22% more tubers per plant and had 21 % higher＞80g tuber yield than the directly planted potatoes.

• 한국작물학회지
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• 제55권1호
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• pp.31-37
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• 2010

심지양액재배 씨감자의 크기가 노지포장에서의 생산성 반응을 검토하기 위하여 봄재배에는 <1, 1~3, 3~5, 5~7, 7~10, 10~20, 20~30, 30~50, 50~80 g의 심지재배 씨감자를 심었고, 가을재배에는 봄재배의 0.2~1과 50~80 g의 처리를 제외하고 7, 15 g의 분무경에서 생산된 씨감자를 처리로 추가하여 생육및 수량을 조사하였다. 출현율은 두 재배시기 모두 씨감자의 크기가 10~20 g까지에는 씨감자가 클수록 크게 증가하였으나, 10~20 g 이상의 씨감자 파종구에서는 88% 이상으로 더 이상 유의성 있게 증가되지 않았다. 출현일수는 봄재배의 경우 34일 내외로 씨감자의 크기에 따른 유의한 차이가 없었으나, 가을재배에서는 씨감자의 크기가 1~3 g에서 30~50 g으로 커짐에 따라 34일에서 16일로 크게 단축되었다. 씨감자 크기가 커짐에 따라줄기수가 많았으며, 줄기의 길이와 굵기 및 잎의 크기도 증가되는 경향이었다. 두 재배시기 모두 주당괴경수, 괴경평균중, 총괴경 및 규격씨감자 수량은 씨감자가 10~20 g까지 커짐에 따라 거의 직선적으로 많아졌고, 더 이상 씨감자가 커질 때 완만히 증가되는 경향이었다. 가을재배에만 심은 비슷한 크기의 심지양액재배와 분무경씨감자 사이에 총괴경 및 씨감자수량은 유의한 차이가 없었다.

• 한국자원식물학회지
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• 제22권6호
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• pp.546-551
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• 2009

We examined the growth characteristics, fresh tuber yield, rotenone content of two yam beans (Pachyrhizus erosus and P. ahipa) introduced from Mexico. P. erosus species showed better adaptable ability than P. ahipa species in seed productivity and tuber yield. Rotenone content in the P. erosus species extracted with chloroform was 3.6 folds much more extracted than ethanol extraction. The order of rotenone content found in crude extract obtained by different solvent extraction from the highest to the lowest was mature seed (484.7 ${\mu}g$) and leaves (17.2 ${\mu}g$) of the P. erosus species, respectively.