• Journal of Biosystems Engineering
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• 제37권3호
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• pp.201-208
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• 2012

Purpose: This study was conducted to develop a vegetable transplanting robot which transplants seedlings from a nursery tray to a plant pot using its four fingers. Method: The robot consists of the transplanting part, nursery tray moving part, plant pot moving part, main frame and controller. Two moving parts are controlled by the photo sensor and servo motor. The transplanting part was composed with two components; transporting device using E-MY2H(SMC Corp., Japan) for controlling finger position accurately and finger for transplanting the seedling. Results: Head lettuce using the transplanting robot was transplanted in 21 days after sowing based upon the seed shape measurement and removing examination. The optimal finger shape was thin pin type because it caused minimum damage to the roots of seedlings. Conclusions: The four inclined pin type was applied to remove the seedlings from the nursery tray. In addition, the transplanting capacity of the developed robot was 2800 pots per hour and the rate of success was 99% and above.

• 기술혁신학회지
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• 제20권3호
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• pp.709-731
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• 2017

흡수역량(absorptive capacity)에 관한 활발한 연구에도 불구하고 선 후진국 간의 빈부격차는 심화되고 있으며, 일부 성공사례를 제외하면 개발도상국의 기술혁신 역량의 향상은 기대수준에 미치지 못하고 있다. 본 논문에서는 KIST 설립 사례를 분석하여 개발도상국 측의 흡수역량과 더불어 선진국 측의 새로운 역량이 필요함을 주장하고, 이를 '공유역량(transplanting capacity)'이라 명명 하였다. 기존 연구에서 밝혀진 흡수역량의 핵심요소, 즉 사전지식의 정도 및 노력의 강도에 대비되는 공유역량의 핵심요소로서 개발경험의 성문화(codification), 현지화(localization), 그리고 의지(committment)가 필요함을 제시하였다. 지구 온난화 및 감염성 질병 등 글로벌 이슈에 공동대처, IT기술의 발달 및 신생기술의 출현에 의한 개도국의 혁신 가능성 확대, 개도국 시장의 성장 가능성은 공유역량의 확보가 개도국지원 차원뿐만 아니라 선진국 자신을 위해서 반드시 갖추어야 할 역량임을 보여준다.

• 생물환경조절학회지
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• 제6권3호
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• pp.159-167
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• 1997

플러그육묘의 대량생산 보급에 대처하기 위하여는 정식기의 보급이 필요하다. 본 연구에 서는 국내보급중인 반자동정식기의 정식성능을 조사 분석하므로써 기계정식 작업시 최적작업조건 구명과 정식기 연구 개발의 기초 자료를 획득하고자 실시하였고, 정식시험을 실시한 결과를 요약하면 다음과 같다. 1. 호퍼의 크기는 정식자세와 정식율에 영향을 미치고, 진압이 불량한 정식육묘는 1일후 고사하므로 재관수가 필요하였다. 따라서 복토진압장치는 전후좌우 진압법이 좋으며, 2중관수장치에 의하여 정식시의 관수량을 늘려야할 것으로 생각되나 물통의 용량이 또한 커지게 되어 기계의 운전 조작이 어렵게 되므로 자동육묘공급 정식기는 공간문제와 1~2인 작업을 전제로 할 때 효율면에서 자동관수는 없는 것이 바람직할 것으로 사료된다. 2. 반자동정식기는 몇 가지의 구조적 개선이 필요하지만 현재로도 정식기계의 운전을 주행 속도 14m/min 이하, 정식깊이 2~3cm, 간격 30cm로 하고 고추 육묘는 128공의 45일 육묘, 배추는 128공의 25육묘를 사용하면 플러그육묘의 정식에 적합한 것으로 생각된다.

• 한국환경농학회지
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• 제39권3호
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• pp.273-279
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• 2020

BACKGROUND: After transplanting, the recent abnormal low temperature caused physiological disorders of pepper seedlings. This study was conducted to evaluate the effects of UV-A LED, a physical elicitor, on the chilling tolerance of pepper seedlings. METHODS AND RESULTS: Seedlings were continuously irradiated with 370 and 385 nm UV-A LEDs with 30 W·m^-2 for 6 d. After that, seedlings were exposed to 4℃ for 6 h and then recovered under the normal growing condition for 2 d. There were no significant differences in growth characteristics of UV-A treatments compared to the control. Fv/Fm values of two UV-A treatments were below 0.8. Electrolyte leakage in the control was increased by chilling stress, while 385 nm UV-A had the significantly lowest value. Total phenolic content and antioxidant capacity of two UV-A treatments significantly increased due to UV-A radiation. However, total phenolic content and antioxidant capacity of the control increased due to chilling stress and tended to decrease again during the recovery time. CONCLUSION: We confirmed that UV-A light was effective to induce the chilling tolerance of pepper seedling, and the supplemental radiation of 385 nm UV-A LED before transplanting could be used as a cultivation technique to produce high quality pepper seedlings.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.13-16
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• 2002

The analysis of characteristics of pumping in the small tube well for agriculture were surveyed. Study area was located at the Galsinri in Yesangun near the yedang reservoir. Agricultural electricity using rates for pumping, ground water level and volume of pumping was monitored every week. Pump working ratio and pump efficiency during period of transplanting of rice showed 48.9%, 62.7% respectively.

• Journal of Biosystems Engineering
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• 제23권3호
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• pp.277-284
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• 1998

This study was conducted to develop m automatic pot-seedling transplanter for plant factory. The transplanter consists of a gripper, row-spacing control device, nursing tray transfer system, growing trough transfer system, and gripper moving device. The gripper picks up pot-seedling. The gripper moving device moves the gripper between nursing tray and growing-flat. Nursing trays are moved to workspace by the nursing tray transfer system. The growing trough transfer system was developed to move growing trough to workspace. The row-spacing control device was used to adjust the distance between adjacent plants traversely. The results of this study are as follows. The transplanting capacity of the developed transplanter was 7.1 seconds per cycle or 1.18 second per pot-seedling. Successful planting was 98.9% without seedlings and 95.8% with seedlings.

• 한국연초학회지
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• 제3권2호
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• pp.103-108
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• 1981

This experiment was carried out to investigate effects of soil moisture content on the growth of tobacco plant at early stage after transplanting. Soil moisture was controlled to be 30%, 45%, 60%, 75% and 90% of the maximum water holding capacity (38.7%), and treated for 10, 20 and 30 days. Budding flowering and topping were delayed in the 30% and 45% treatment where soil moisture was deficient. Plant height, number of leaves, and length and width of the largest leaf were the best in the 75% treatment for 10 days, and development of the root and top was the best also in the same treatment. As the duration of low soil moisture treatment prolonged, intercellular space , became small. Nitrogen and potassium of the cured leaf showed the highest value in 30% and 45% treatments. Nicotine content of the cured leaf was high in the 90% treatment, and reducing sugar content of that was high in the 75% treatment for 10 days.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.206-206
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• 2022

Sustainable agriculture is a potential strategy to enable agricultural cultivation systems to feed the growing population under climate change. Sustainable agriculture consists of environment-friendly farming methods that allow the production of crops with minimal harm to the ecosystem. Early establishment in rice might be helpful to adopt sustainable agriculture with less inputs, such as water and phosphorus fertilizer. Two QTLs conferring tolerance to abiotic stress and low nutrition condition, DTY4.1 and Pup1, respectively, are effective for good establishment in the early growth stage under low water and phosphorus fertilizer application. We developed 'Sechanmi' and 'MSI 1-DTY' harboring Pup1 and DTY4.1 into MS11, a japonica rice variety adaptable to tropical regions, using Marker-Assisted Backcrossing (MABC). MS 11-PD lines were developed to meet the demand for less water and P fertilizer application throughout the growth stage of rice. In the F5 generation, water-saving or rainfed cultivation was performed in different P (phosphorus) content. Irrigation was applied only when severe drought was observed one month after transplanting. There was no significant difference observed between the parents and MS11-PD lines in low P conditions. However, MS11-PD lines had more tillers in P-supplied conditions compared to that of the parents 40 and 50 days after transplanting. Under the same amount of P, MS11-PD lines might have higher phosphorus uptake capacity than the parents, increasing the number of tillers and showing better early establishment. The better vegetative growth stage is one of the factors that can potentially increase production by way of higher number of panicles. Through this breeding strategy, it is possible to attain sustainable agriculture by applying less P and water to address the need of a growing population.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.145-145
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• 2022

South Korea greenhouse gas emissions have increased year by year, resulting in a total emission of 727.6 million tons of CO₂ eq in 2018, a 2.5% increase compared to 2017. Among them, the agricultural sector emitted 21.2 million tons of CO₂ eq., accounting for 2.9% of the total. Among the greenhouse gases emitted from the agricultural sector, a particularly problematic is methane gas emitted from rice paddies. Methane is one of the important greenhouse gases with a global warming potential (GWP) that is about 21 times higher than that of carbon dioxide due to its high infrared absorption capacity despite its relatively short remaining atmospheric period. Since the pattern of methane generation varies depending on the rice variety and ecological type, research related to this is necessary for accurate emission calculation and development of reduction technology. Accordingly, a study was conducted to find out the changes in greenhouse gas emission according to rice varieties and ecology types. As for the rice eco-type cultivar, early maturing cultivar (Haedamssal) and medium-late rice cultivar (Saeilmi) were used. Haedamssal was transplanted on May 25 and June 25, and Saeilmi was transplanted on June 10 and June 25. The amount of methane generated according to the growing day showed a tendency to increase as the planting period was earlier. The difference between varieties was that Haedamssal showed higher methane production than Saeilmi. The total CH₄ flux in the saeilmi was 18.7 kg·h^-1(Jun 10 transplanting), 12.4 kg·h^-1(Jun 25 transplanting) during rice cultivation. Lower methane emission was observed in Saeilmi than in Haedam rice. In addition, the earlier the planting period, the higher the methane emission. This study is the result of the first year of research, and it is planned to investigate the amount of greenhouse gas emission between double cropping and single cropping using wheat cultivation after harvest for each ecological type.

• 한국농림기상학회지
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• 제8권3호
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• pp.141-144
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• 2006

절수관개에 따른 벼농사 물수지 및 생육특성을 구명하여 관개수 효율성과 생산성을 개선하고자 시험한 결과를 요약하면 다음과 같다. 가. 벼 생육기간 동안 관개용수량은 관행 대비 수분포화에서 8%, 포장용수량(실금이 갈 때 관개) 상태와 토양균열(토양균열후 5일에 관개)에서 18% 절감되었다. 나. 관개방법별 출수기는 같았고 절수재배시 관행관개 대비 간장은 짧고 수수는 적었다. 다. 쌀 수량은 관행관개 대비 수분포화는 비슷하였고, 포장용수량 상태는 7%, 토양균열은 13%가 감수되었다. 라. 절수재배시 현미의 완전립 비율은 낮았고, 아밀로스 함량은 높았다. 따라서 가뭄이 지속되어 관개수가 부족할 경우에 최소한 관개용수량은 같으면서 수량 감소가 적은 포장용 수량 상태 정도는 유지할 수 있게 관개하여야 될 것으로 생각된다.