• Korean Journal of Plant Resources
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• v.12 no.1
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• pp.27-30
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• 1999

This experiment was conducted to investigate the change of root yield and essential oil contents by cultivated year in Asaram siebold Mio. Growth of aerial part such as plant height, leaf length and leaf width increased rapidly in two to three-year-old. Root length and root weight per plant were increased as cultivation year passed. Especially the speed of development was very fast in two and three-year-old alike aerial part. Root yield was the highest at five-year-old. The content of essential oil was decreased gradually as cultivation year passed. Methyleugenol content was increased, while safrole content was decreased by cultivated years. The increasing of methyleugenol content in four to five-year-old was not higher than three to four-year-old. In the result, it concluded that the optimum harvest time of Asarum sieboldi MiO is five-year-old cultivated based on root yield and effective medical components.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.1
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• pp.129-129
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• 2003

본 연구는 음식물 퇴비의 합리적인 시용량을 검증하고, 3년 연용에 의한 토양 변화 및 고추 생육과 수량에 미치는 영향을 평가하고 돈분퇴비를 시용한 대조구와 생육 및 품질 면에서 비교 분석하여 적정한 퇴비 시용량을 설정하기 위하여 실시하였다. 처리구는 1, 2, 3차 연도 모두 동일한 방법으로 무처리구, 대조구(2ton/10a의 돈분퇴비), 음식물 퇴비 2t, 4t, 6t, 8ton/10a을 사용한 처리구 등 6개를 두었으며 3반복, 난괴법을 이용하였다. 음식물 퇴비와 돈분 퇴비의 이화학적 특성을 분석한 결과, 음식물 퇴비의 경우 1차 연도는 유기물과 NaCl 모두 부산물 비료의 공정규격에 적합하였으나, 2차 연도는 유기물이, 3차 연도는 NaCl이 공정규격에 적합하지 않았다. 그리고 돈분 퇴비의 경우 수분함량이 약간의 차이를 보였으나 공정규격을 벗어나지는 않았다. 토양은 음식물 퇴비 시용량이 증가할수록 대부분의 화학적 특성이 증가하였고, 연용에 의해서도 유기물, 치환성양이온, NaCl 등의 양이 증가함을 보여 염류집적이 일어나고 있음을 확인할 수 있었다. 또, 음식물 퇴비 시용량증가에 따라 비중은 낮아지고 공극률이 증가하여 물리성 개선에 도움을 주었으나, 1, 2, 3차 연도를 비교해 보았을 때 큰 차이는 없었다. 고추의 생육과 수량에 있어서도 음식물 퇴비 시용량이 증가할수록 초기 생육이 저조하였으며, 그로 인해 수량이 감소하였다. 또한 3년 연용으로 인한 음식물 퇴비의 축적으로 수량의 감소와 품질 저하를 초래하였다. 음식물 퇴비의 연용에서 2ton/10a 이상의 시용은 수량의 감소를 초래하였다. 이러한 결과로 볼 때 음식물 퇴비를 2ton/10a 이하로 사용하면 큰 무리는 없겠지만 장기 연용은 삼가는 것이 좋을 것이라 판단된다. 따라서 음식물 퇴비를 다른 일반 퇴비 제조의 중간 원료나, 또는 혼합 사용하는 시험을 계속 진행 중에 있다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.61-61
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• 2019

본 연구에서는 실내 광조건에서 자생 장미과 상록 활엽 목본 2종의 생육반응을 조사하였다. 식물재료는 다정큼나무[Rhaphiolepis indica var. umbellata (Thunb.) Ohashi]와 비파나무[Eriobotrya japonica (Thunb.) Lindl.]의 3년생 실생묘를 사용하였다. 실내 광량은 10, 50, 100 및 200 PPFD (${\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)로 설정되었으며, 광주기(12/12 h), 온도($25{\pm}1^{\circ}C$), 습도($55{\pm}3%$) 및 관수(1회/3일) 주기는 일정하게 유지하였다. 실내에서 8주간 재배한 다음 유리온실에서 동일 기간동안 재배된 대조구와 생육 및 광합성 능력 등을 비교하였다. 연구 결과, 다정큼나무의 생육은 200 PPFD에서 대조구와 유사한 수준이었으며, 줄기직경은 광량과 정비례하는 경향이었다. 엽수는 대조구에 비해 고 광량(100, 200 PPFD) 조건에서 유의적으로 높은 결과를 보였다. 처리 별 최대 양자수율(Fv/Fm) 및 광계II 성능지수(Pi_Abs)는 대조구와 유사한 수준이었으며, 광량에 따른 유의적인 차이가 없었다. 비파나무는 재배기간 동안 광량에 관계없이 생육변화가 크지 않았으나, 엽록소함량은 200 PPFD에서 가장 많았다. 한편 10 PPFD에서는 모든 개체의 잎 고사에 따른 관상가치가 하락하였다. Fv/Fm은 200 PPFD에서 대조구와 유사한 수준이었으며, Pi_Abs는 저광량(10, 50 PPFD) 조건에서 유의적으로 높은 수치였다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2003.09a
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• pp.131-137
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• 2003

지구온난화와 관련된 기후변화가 원예작물에 미치는 영향을 살펴보면, 첫째, 원예작물의 생장과 발육에 영향을 주어 발아기, 개화기, 수확기 등 생육단계을 전반적으로 빠르게 하여, 최종 수확물의 품질과 저장력을 변화시키며(임 등. 1990; Jang et al., 2002), 겨울철의 이상난동은 빈번한 동해 피해와 초기 발육불량을 가져오고, 봄철 잦은 강우나 건조는 작물의 개화기에 수분ㆍ수정에 영향을 주어 착과율을 떨어뜨리기도 한다.(중략)

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.6
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• pp.861-866
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• 2012

Water is the most important resource for the potato cultivation, especially to get the maximum water use efficiency and yield of potato, Water has to be applied moderately based on the water requirement of the potato. Crop water requirement (WR) is a function of the Potential evapo-transpiration(PET) and Crop coefficient (Kc). PET can be estimated by the climate data measured at the weather station in the production region. Kc was measured by the NIAST (RDA) through Lysimeter experiments. In this study, the growth stage of potato was divided as four (G-1 : Apr. 1~Apr. 15, G-2 : Apr. 16~May. 10, G-3 : May. 11~May. 31, G4 : Jun. 1~Jun. 15). The average PET during potato growing season of the 45 areas was $2.95mm\;day^{-1}$. The most water requirement was the G-3 stage among the potato growth stage. The MWR (Mean water requirement) according to growth stage was 1.0~1.2 (average 1.1), 1.5~1.8 (average 1.6), 1.9~2.2 (average 2.0) and 1.7~2.1 (average 1.8) mm $day^{-1}$, in the G-1, G-2, G-3 and G-4 stage, respectively. The TWR (Total water requirement) according to growth stage was 18.0~22.1 (average 19.3), 50.6~66.6 (average 56.3), 63.5~88.2 (average 72.4) and 38.3~54.5 (average 44) mm, in the G-1, G-2, G-3 and G-4 stage, respectively.

• Journal of Bio-Environment Control
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• v.26 no.4
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• pp.268-275
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• 2017

The photosynthetic rates of crops depend on growth environment factors, such as light intensity and temperature, and their photosynthetic efficiencies vary with growth stage. The objective of this study was to compare two different models expressing canopy photosynthetic rates of romaine lettuce (Lactuca sativa L., cv. Asia Heuk romaine) using three variables of light intensity, temperature, and growth stage. The canopy photosynthetic rates of the plants were measured 4, 7, 14, 21, and 28 days after transplanting at closed acrylic chambers ($1.0{\times}0.8{\times}0.5m$) using light-emitting diodes, in which indoor temperature and light intensity were designed to change from 19 to $28^{\circ}C$ and 50 to $500{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, respectively. At an initial $CO_2$ concentration of $2,000{\mu}mol{\cdot}mol^{-1}$, the canopy photosynthetic rate began to be calculated with $CO_2$ decrement over time. A simple multiplication model expressed by simply multiplying three single-variable models and a modified rectangular hyperbola model were compared. The modified rectangular hyperbola model additionally included photochemical efficiency, carboxylation conductance, and dark respiration which vary with temperature and growth stage. In validation, $R^2$ value was 0.849 in the simple multiplication model, while it increased to 0.861 in the modified rectangular hyperbola model. It was found that the modified rectangular hyperbola model was more suitable than the simple multiplication model in expressing the canopy photosynthetic rates affected by environmental factors (light Intensity and temperature) and growth factor (growth stage) in plant factory modules.

• Journal of Mushroom
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• v.14 no.2
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• pp.39-43
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• 2016

In this study, we observed differences in the fruit body genesis in with seasonal changes. The mushrooms generated different spines even when under same environmental conditions in equivalent growth chambers during different seasons. The growth chamber conditions were set at $18^{\circ}$, 1000 ppm CO and 95% humidity for uniform primordium formation. Following this, the humidity was reduced to 85% during growth and development. The characteristics of the fruit body were measured: yield (weight), length (size), hardness, and chromaticity. Each measure was relatively compared owing standard data for. We investigated the environmental factors to assess the cause of variation in fruit body. Change in temperature and humidity were especially focused on, apart from climate that can affect mushroom growth. It was observed that temperature and humidity both influence fruit body growth. Not the absolute value of the elevation, there was a change of climate which the temperature is lowered and lowered the humidity can be assumed that the changes in the environmental conditions inside the growth chamber the mushroom growth.

• Korean Journal of Agricultural and Forest Meteorology
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• v.15 no.4
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• pp.282-290
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• 2013

Biophysical and biochemical processes through which crops interact with the atmosphere have been simulated using land surface models and crop growth models. The Noah Multi Physics (MP) model and the CERES-Rice model, which are a land surface model, and a crop growth model, respectively, were used to simulate and compare rice growth and evapotranspiration (ET) in the areas near Haenam flux tower in Korea. Simulations using these models were performed from 2003 to 2012 during which flux measurements were obtained at the Haenam site. The Noah MP model failed to simulate the pattern of temporal change in leaf area index (LAI) after heading. The simulated aboveground biomass with the Noah MP model was underestimated by about 10% of the actual biomass. The ET simulated with the Noah MP model was as low as 21% of those with the CERES-Rice model. In comparison with actual ET measured at Haenam flux site, the root mean square error (RMSE) of the Noah MP model was 1.8 times larger than that of the CERES-Rice model. The Noah MP model seems to show less reliable simulation of crop growth and ET due to simplified phenology processes and assimilates partitioning compared with the CERES-Rice model. When ET was adjusted by the ratio between leaf biomass simulated using CERES-Rice model and Noah MP model, however, the RMSE of ET was reduced by 30%. This suggests that an improvement of the Noah MP model in representing rice growth in paddy fields would allow more reliable simulation of matter and energy fluxes.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.1
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• pp.130-130
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• 2003

본 연구는 음식물찌꺼기의 재활용 방법의 일환으로 음식물 퇴비와 돈분 퇴비를 혼합, 고추 작물에 적용하여 생육 및 품질면에서 합리적인 시용량을 검증하고 토양 이화학적 특성변화 및 고추 생육과 수량에 미치는 영향을 평가하기 위해 실시하였다. 퇴비의 처리는 관행구(2ton/10a의 돈분 퇴비)와 음식물 퇴비 및 돈분 퇴비의 혼합구인 0.5t:1.5t, 1.0t:1.0t, 1.5t:0.5t, 2.0t:0ton/10a의 4개 처리구등 총 5개 처리구를 난괴법 3반복으로 수행하였다. 돈분 퇴비와 음식물 퇴비의 이화학적 특성을 분석한 결과 음식물 퇴비는 유기물이 기준량에 2배정도 높았으며, NaCl은 공정규격인 1%를 약 2.5배정도 초과하였다. 음식물 퇴비의 시용량 증가에 따라 토양 pH는 처리구별 특별한 변화는 없었으며, EC는 전체적으로 증가하였다. 생육기간 중 대조구와 음식물 퇴비의 처리구간 생육차이가 약간 나타났으며, 그로 인해 고추의 수량에 영향을 미친 것으로 판단된다. 음식물 퇴비 처리구에서 1ton/10a이상 일 때 시용량이 증가할수록 수확량 및 고추 개수에 있어서 감소 경향을 보였지만 수량 차이는 크지 않았다. 또한 capsaicin 함량에서도 음식물 퇴비 처리구간에 큰 차이는 보이지 않았다. 음식물 퇴비의 시용량에 따라 고추에 흡수되는 양분 흡수량은 큰 차이를 보이지 않았다. 결론적으로 음식물 퇴비를 시용한 고추 재배 시험에서 토양의 유기물 함량 증가, 물리성 개량, 토양 pH 완충력 증대 등의 효과를 보였다. 그러나 음식물 퇴비를 50%이상 돈분 퇴비와 혼합 시용시 고추의 수량이나 품질의 저하 및 토양의 염류집적의 우려가 나타났으나, 50%이하로 혼합 시용시 큰 무리는 없었다. 현재 적정 혼합비율을 구명하기 위한 연구가 진행중이다.

• FLOWER RESEARCH JOURNAL
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• v.18 no.4
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• pp.225-230
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• 2010

This study was conducted to increase the income of cactus farm by selecting cheaper and better media than the peat moss using for Gymnocalycium mihanovichii 'Huhong'. We cultivated Gymnocalycium mihanovichii 'Huhong' on 10 kinds of media (peat moss, culture medium, coco peat, sphagnum moss, hydro ton, hydro cray, hydro bal, hugato, vermiculite, perlite) and analyzed media's physiochemical factors and growth, betacyanin. The results were as follows: In case of media's physical condition planting Gymnocalycium mihanovichii 'Huhong' after 90 days, an approximate value with peat moss is culture medium and coco peat. Also, coco peat has no change in chemical media. The rate of growth and development is high in Coco peat while overall culture medium and coco peat was seen lower growth. The level of betacyanin in subirrigation is higher than overhead irrigation. Meanwhile, hugato among 10 kinds of media has high value in both of overhead irrigation and bottom watering. Thus, culture medium and coco peat is proper for alternation of peat moss due to similar value with peat moss. And coco peat is favorable to media, growth condition, pigment.