• 한국토양비료학회지
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• 제48권6호
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• pp.683-688
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• 2015

Nowadays, sustainable and environment-friendly agriculture has become an important issue all around the world, and repeated applications of mineral and/or organic fertilizer will probably affect mineral nutrient dynamics in soil in the long term but only a limited number of observations are available. This study was carried out to investigate whether there is any influence of different fertilizer management for red pepper (Capsicum annuum L.) cultivation on soil physicochemical properties, leaf mineral content, yield and fruit quality in the aspect of long-term practice in open field condition. NPK, NPK+compost, compost only, and unfertilized control plot were included in the treatments. The application of chemical fertilizer and/or compost repeated annually for 17 years from 1994 to 2011. Soil organic matter content was higher in compost treatments than in no-manure treatments. Available phosphate and the yield of red pepper were highest in NPK+compost treatment followed by NPK (chemical fertilizer), compost, and control. The results indicate that in the long term, nitrogen supply is still needed for increasing red pepper yield, but reduction in the use of chemical fertilizer could be also possible with the proper application of compost.

• 한국작물학회지
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• 제63권4호
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• pp.314-321
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• 2018

Durum (Triticum turgidum L. ssp. durum) is a major crop species cultivated for human consumption worldwide. In Tunisia, salt stress is one of the main problems that limit crop production. 'Mahmoudi' was selected as the most salt-sensitive out of 11 Tunisian durum cultivars. Using the salt-tolerant cultivar 'Om Rabia', resistant and susceptible cultivars were evaluated to compare genetic responses under salt stress. At the fully expanded third leaf stage, salt stress was applied by submerging the pots in 500 mM NaCl for 5 min every day for saline water irrigation in the greenhouse. The treatment was applied for 1 week and salt stress tolerance was determined by changes of growth parameters to the control condition. The salt tolerance trait index and salt tolerance index were calculated and used as selection criteria. The expression levels of TdHKT1;4, TdHKT1;5, and TdSOS1 were examined using qPCR. For further evaluation of physiological responses, salt stress (150 mM NaCl) was additionally applied for 48 h at the fully expanded third-leaf stage. Increased expression of the genes responsible for salt tolerance and proline content in tolerant durum can be used to broaden genetic diversity and provide genetic resources for the durum breeding program.

• 한국농공학회논문집
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• 제61권1호
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• pp.95-105
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• 2019

Evapotranpiration (ET) is one of the important factor in Hydrological cycle and irrigation planning. In this study, temperature-based artificial neural network (ANN) model for daily reference crop ET estimation was developed and compared with reference crop evapotranpiration ($ET_0$) from FAO-56 Penman-Monteith method (FAO-56 PM) and parameter regionalized Hargreaves method. The ANN model was trained and tested for 10 weather stations (5 inland stations and 5 costal stations) and two input climate factors, maximum temperature ($T_{max}$), minimum temperature ($T_{min}$), and extraterrestrial radiation (RA) were used for training and validation of temperature-based ANN model. Monthly reference ET by the ANN model also compared with parameter regionalized Hargreaves method for ANN model applicability evaluation. The ANN model evapotranspiration demonstrated more accordance to FAO-56 PM evapotranspiration than the $ET_0$ from parameter regionalized Hargreaves method(R-Hargreaves). The results of this study proposed that daily reference crop ET estimated by the ANN model could be used in the condition of no sufficient climate data.

• 한국작물학회지
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• 제25권4호
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• pp.10-16
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• 1980

벼의 내한성에 관여하는 생태 및 형태적인 특성을 찾기 위하여 수도과 능도 각 5품종씩을 가지고 파종상자에서 벼를 재배하고 건조처리한 후 다시 관수하여 위주상태에서 생육이 회복되는 정도를 비교하였으며 관련되는 식물체부위의 특성과의 관계를 구한 결과 다음과 같이 요약할 수 있였다. 1. 건조처리후 재생력은 수도가 육도보다 강하였고 수도에서는 인도형품종이 일본형 품종보다 강하였다. 2. 생육단암별 재생력은 생육초기에 가장 높았고 생육이 진전되면서 점점 낮아졌는데 어느 시기에서나 수도가 육종보다 높은 재생력을 나타내었다. 3. 초장과 엽면적의 차이는 건조처리후 재생력에 영향을 미치지 않았다. 4. 뿌리 발달의 특성에 주근의 두께와 뿌리의 총건물중은 수도보다 육도에서 높았으며 이것은 밭재배에서의 수량과 높은 정의 상관이 있었다.

• 한국작물학회지
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• 제60권4호
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• pp.484-490
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• 2015

본 연구는 완두나물로 활용 가능한 유전자원을 선발하고, 그에 적합한 재배조건을 설정하고자 재배 온도 및 기간에 따른 완두나물의 재배특성 및 항산화 활성을 분석하여 완두를 이용한 채소용 나물 최적 재배 조건을 구명하고자 실시하였다. 1. 완두 유전자원 38점 중 완두 나물로 이용 가능한 자원으로 PI269803, PI343278, PI343283, PI343300와 PI343307을 1차적으로 선발하였다. 2. 1차 선발된 완두자원을 대상으로 완두나물 재배 조건을 설정하기 위하여 $20^{\circ}C$, $23^{\circ}C$와 $25^{\circ}C$에서 각각 7일간 재배하였다. 그 결과 전장과 배축장은 $20^{\circ}C$와 $25^{\circ}C$에 비해 $23^{\circ}C$에서 가장 높게 증가하였다. 3. 재배온도별 나물수율은 $23^{\circ}C$에서 가장 높게 나타났으며, 유전자원 PI269803와 PI343300이 다른 자원에 비해 높은 나물수율을 나타내었다. 4. 재배온도별 완두나물의 조단백질 함량을 분석한 결과 온도에 따른 조단백질 변화는 나타나지 않았다. 5. 재배 온도별 완두나물의 폴리페놀 함량과 자유 라디칼 소거능을 측정함으로써 항산화 특성을 조사하였다. 그 결과 PI343278와 PI343283에서는 재배 온도가 증가함에 따라 폴리페놀 함량과 자유 라디칼 소거능이 감소하는 경향을 나타내었다. 그러나 PI269803와 PI343300에서는 $20^{\circ}C$와 $25^{\circ}C$에 비해 $23^{\circ}C$에서 높은 폴리페놀 함량과 항산화 활성을 나타내었다. 6. 높은 나물수율과 항산화 특성을 보이는 PI269803과 PI343300은 완두나물 이용에 적합한 자원으로 예상된다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.334-334
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• 2017

Unstable soil moisture conditions often negatively affect the emergence, seedling establishment, and growth uniformity at the initial stage, and then reduce the grain yield and biomass in direct seeding cultivation for rice in rainfed fields. Therefore it is important to develop a technique to increase the rapid and stabilized seedling establishment and improve the uniformity of initial growth after sowing. This study aims to confirm results on seed priming effect of indoor using petri dish experiments can be reproduced in the field using container at Ghana. Twenty-seven rice varieties including of Oryza sativa L. and O. glaberrima Steud. were used in this study. The experiments using petri dish and container with different soil moisture conditions (5%, 10%, 15%, 20%) were compared. As a result, a significant positive correlation was found between the germination time uniformity in the primed seed of petri dish and emergence time uniformity in the primed seed of container in 10% and 15% soil moisture condition. A significant positive correlation was found between the germination time uniformity in the primed seed of petri dish and plant height in the primed seed of container in 10% soil moisture condition in O. glaberrima. This study concluded that the priming effect in petri dish demonstrate those in container in the field condition of Ghana in 10% and 15% soil moisture condition during seedling stage.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.53-53
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• 2017

Unstable soil moisture conditions often negatively affect the emergence, seedling establishment, and growth uniformity at the initial stage, and then reduce the grain yield and biomass in direct seeding cultivation for rice in rainfed fields. Therefore it is important to develop a technique to increase the rapid and stabilized seedling establishment and improve the uniformity of initial growth after sowing. This study aims to confirm results on seed priming effect of indoor using petri dish experiments can be reproduced in the field using container at Ghana. Twenty-seven rice varieties including of Oryza sativa L. and O. glaberrima Steud. were used in this study. The experiments using petri dish and container with different soil moisture conditions (5%, 10%, 15%, 20%) were compared. As a result, a significant positive correlation was found between the germination time uniformity in the primed seed of petri dish and emergence time uniformity in the primed seed of container in 10% and 15% soil moisture condition. A significant positive correlation was found between the germination time uniformity in the primed seed of petri dish and plant height in the primed seed of container in 10% soil moisture condition in O. glaberrima. This study concluded that the priming effect in petri dish demonstrate those in container in the field condition of Ghana in 10% and 15% soil moisture condition during seedling stage.

• 한국작물학회지
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• 제29권1호
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• pp.67-71
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• 1984

참깨의 주요병해인 역병에 대한 품종선발시험과 엽고병에 대한 발병조건을 구명하기 위하여 포장과 온실을 이용하여 시험을 실시한 결과 다음과 같은 중요 사항이 관찰되었다. 1. 역병에 대한 저항성품종은 Orotall. Suweon 7, Suweon 27 및 조치원이 저항성 품종으로 나타났고 PI 280795, IS 103도 다소 강한 품종으로 보였다. 2. 참깨 엽고병예 대한 발병률은 고온인 3$0^{\circ}C$에서 광의품종이 15%, 김포품종이 25%의 병반면적률을 보였고, 저온인 17$^{\circ}C$에서는 광의가 50%, 김포가 70%로 높은 이병성을 보였다. 3. 참깨 엽고병의 발병률은 다습조건에서 품종 광의가 55%, 김포가 80%의 병반면적률을 보였고. 건조조건에서는 광의와 김포품종이 각각 10%와 15%의 병반면적률을 보임으로서 다습조건에서 심한 발병현상을 보였다. 4. 엽령별 엽고병 발병정도를 보면 6엽기와 개화기에 각각 20%와 52.5%의 병반면적률을 보여 심한 발병현상을 보였고, 10엽기와 20엽기에는 이보다도 낮은 발병률을 보였다.

• 한국약용작물학회지
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• 제18권1호
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• pp.9-14
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• 2010

Several presowing seed treatments have been used to facilitate the seed germination and seedling emergence. The study was performed to design a model of presowing seed treatments in Taraxacum platycarpum. Germination and seedling growth responses to temperature, drying, chilling, $GA_3$ and priming were investigated to know the optimum germination conditions and presowing treatment. The optimum temperature condition for germination and seedling growth were $15{\sim}20^{\circ}C$ at dark condition. The seeds exposed to infra red light, however, did not germinate. The moisture content of seeds dried at $35^{\circ}C$ for 3.5 hours was returned to the level of unimbibed seeds. The germination of seeds dried under dark condition was better than those dried under infra red light. Prechilling treatment imposed for 6 weeks showed higher germination rate than $GA_3$ treatment or priming. In field test, the highest field emergence was observed in the seeds dried after prechilled for 6 weeks and followed by drying followed by $GA_3$ > low temperature > $KNO_3$ priming. Imbibition with 0.1 mM $GA_3$ solution for 2 hours then drying at 35 for 3.5 hour under dark condition was effective to the practical presowing treatment for Taraxacum seeds.

• 한국약용작물학회지
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• 제23권5호
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• pp.370-378
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• 2015

Background : Aruncus dioicus var. kamtschaticus, functional wild vegetable, is perennial herb and young leaves with soft texture are generally used as edible food. So the demand for the vegetable has increased recently. This study was carried out to determine the effects of temperature and shading on germination characteristics of A. dioicus. Methods and Results : The experiment was performed by temperature and shading treatments. Seed pre-treatment before the germination experiment was carried out by the storage in low temperature ($4^{\circ}C$) under wet condition (LTW) for 0, 15, 30, 45 and 60 days and shading treatment were 35%, 50%, and 75% under control, BA (6-benzyladenine) and $GA_3$ (gibberellic acid) condition for 24 hours. Increasing the length of the storage periods led to increases seed germination percent in low temperature ($4^{\circ}C$) under wet condition (LTW), germination rate of A. dioicus seed was the highest at $15^{\circ}C$ with 60 days of seed pre-treatment. In the case of seeds pre-treatment with LTW, the more temperature went up, the more days to 50% of Germination of Final Germination Rate ($T_{50}$) went down. As a result of surveying shading treatment, germination rate was the highest in control of 35% shading and the next higher was in control of 50% shading. Conclusions : It is concluded that the temperature and shading are important factors to produce A. dioicus. Also, We suggest these results as basic data of A. dioicus for sexual propagation.