• 한국식품저장유통학회지
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• 제7권1호
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• pp.51-56
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• 2000

Quality characteristics of Satsuma mandarin (Citrus unshiu Marc.var.miyagawa) harvest on early December according to production areas and sea level altitude of Cheju were investigated. Soluble solids and flesh ratio were distributed 9.32∼12.50, 75.95%-81.3 in citrus fruits harvested in orchards located below 10m sea level altitude (lower area), and was 10.23-12.17 , 77.35%-80.29% on those over 150m sea level altitude )higher area), respectively. Acid content of citrus juice was 0.95%-1.26% in fruits harvested inlower area, and was 1.02%-1.39% in higher area. In proportion to late harvesting , Brix/acid ratio and fruits quality was improved. Soluble solids of fruits harvested in higher area were higher than those of fruits from higher area, but acid contents were on the contrary . In sensory evaluation on fruit appearance, the differences between two altitudes were not clear.

• 대한기관식도과학회지
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• 제3권2호
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• pp.327-331
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• 1997

One of the most difficult airway problems is a subglottic stenosis combined with a tracheal stenosis. Laryngotracheal stenosis has not been completely solved with classic methods like cricotracheal split with autogenous cartilage graft, thyrotracheal anastomosis, and free hyoid or hyoid-sternohyoid myo-osseous flap reconstruction. A 28-near-old male patient who had had laryngotracheal stenosis was successfully treated by laryngotracheal reconstruction using vascularized clavicle. This method has a several advantages: the vascularized clavicle harvesting in the same operative fields, one stage operation, less restenosis due to plentyful blood supply, md prevention of airway collapse due to a clavicle provided framework. It is too early to make a definite conclusion, but the authors suggested that this method could become one of the most effective methods of laryngotracheal stenosis.

• 한국초지학회:학술대회논문집
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• 한국초지조사료학회 2005년도 학술심포지엄, 제43회 학술발표회
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• pp.164-165
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• 2005

• 한국환경과학회지
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• 제24권2호
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• pp.253-260
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• 2015

Enlargement of street tree planting area is the proper and effective solution to reduce carbon dioxide. This solution bases on the ability of carbon storage and uptake by tree metabolism. However, the circumstance of road side has fatal disadvantages in tree metabolism such as growth and maturity because cutting and filling of roadsides cause unnatural soil composition. In this point, early rootage of street tree is the main factor of reducing carbon dioxide. This study aimed to find a appropriate transplantation planting method for sound and rapid rootage of street tree. For the study, Korean Mountain Ash(Sorbus alnifolia) were used for experimental groups. The groups were categorized by three groups such as trees produced on container with mulching treatment, trees produced in outdoor with mulching treatment, trees produced on container with weeding treatment. Each group consisted 10 trees with same size and transplanted in experimental site. Five months after transplanting, each group was estimated the biomass and carbon storage through a direct harvesting method. According to results of the study, the carbon storage of trees produced on container with mulching treatment is 42% more than trees produced in outdoor with mulching treatment. And the carbon storage of trees produced on container with mulching treatment is 19.5% more than trees produced on container with weeding treatment. These results may imply that transplantation of container produced tree with mulching treatment is the most rapid rootage among other groups. The weeding treatment is more effective than mulching treatment for rapid rootage of street trees.

• 한국작물학회지
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• 제44권3호
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• pp.221-224
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• 1999

A field experiment was carried out to observe the weed control effects of vetch and to evaluate vetch characteristics on clay loam soil in no-till direct-sown rice-vetch cropping systems. The effects of weed control, forage productivity, and N content of vetch plants were investigated. With the progress of plant growth, density of Chinese milk vetch (Astragalus sinicus L.) gradually decreased, but densities of foxtail and other weeds decreased steeply due to the depression by the over-shaded vetch canopy in a no-till direct-sown rice-vetch cropping paddy field. The vetch density in tillage systems was lower than in notillage cropping systems. Lower vetch density occurred with an increase in foxtail density and other weeds. Weed control effect increased by the progress of vetch growth, which indicated that the vetch canopy over-shaded the weeds. Vetch straw was degraded rapidly submergence after with water at the time of wet sowing of rice. Early harvesting of vetch seed resulted in lower seed germination. To acquire enough seedlings without re-sowing, the harvesting of seed should be delayed at least 28 days after the flowering stage in order to ensure the vetch population is sustainable in a no-till direct-sown rice-vetch cropping system. In order to improve the survival of vetch plants, vetch seeds should germinate from the heading .stage to before the full-ripening stage of rice plants. To enhance the percent of over-wintering survival, vetch seeds should germinate no later than the end of October in southern Korea. The dry weight of vetch plants increased with the progress of vetch growth until the flowering stage but N content decreased for 30 days from before the flowering stage (2.9%) until the ripening stage (1.8%). We concluded that Chinese milk vetch could have an effect on weed control before the flowering stage, sustainability without re-sowing of seed annually, and effective green manure for rice pre-crop in no-till direct-sown rice-vetch relay cropping systems.

• 한국작물학회지
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• 제14권
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• pp.139-145
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• 1973

Choline Chloride를 이용하여 고구마의 단작재배와 맥후작재배간에 어떤 수준의 농도에서 괴근의 비대촉진과 생육 및 수량에 미치는 영향을 구명하기 위하여 시험하였든바 그 결과는 다음과 같다. 1) 처리의 적정농도는 재배기에 따라 다소 차이가 있어 단작재배에서는 23.3ppm 그리고 맥후작 재배의 경우 31.1ppm이 적정농도이고 처리시간은 24시간이며 처리방법은 묘를 채취한 후묘의 기부만을 침지하면 좋다. 2) Choline Chloride는 지상부의 생육을 억제하여 만장을 단축케 하고 건물중을 저하케 하였다. 3) 지하부의 생육관계는 지상부의 동화산물을 지하부에 전류케 함으로써 괴근수를 많게 하는 동시에 수확기별 수량의 증가가 현저하였고 그 경향은 적기수학에서 보다도 조기수확에서 높았다. 4) 따라서 일반유기성분의 함유율 분석결과 당분전분등이 높은 편이고 그밖의 조섬유, 조단백질등은 낮은 편으로서 금후 더욱 연구할 필요가 있다고 느끼는 바이다.

• 한국작물학회지
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• 제53권3호
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• pp.279-284
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• 2008

녹두의 식물체 부위, 수확시기, 생육단계, 파종기 등에 따른 주요 flavonoids의 함량 차이를 구명하고자 본 연구를 수행하였다. 1. Vitexin과 isovitexin은 녹두 식물체 부위 중에서 종실에만 분포하고 잎, 엽병, 줄기, 뿌리에서는 검출되지 않았다. 2. 녹두 종피에만 vitexin은 $52.1\;mg{\cdot}g^{-1}$, isovitexin은 $51.7\;mg{\cdot}g^{-1}$ 분포하고 자엽에서는 검출되지 않았다. 3. 녹두 조 적 만기 수확에 따른 vitexin과 isovitexin 함량은 차이가 없었다. 4. 녹두 잎에 다량 함유된 기능성 물질을 분리 동정한 결과 rutin이었다. 5. Rutin함량은 녹두 잎, 엽병, 줄기 순으로 많고, 종실, 뿌리, 협에서는 검출되지 않았다. 6. 녹두 잎, 엽병, 줄기에 함유된 rutin은 3, 5, 7엽기 순으로 유묘기일수록 많았다.

• 한국약용작물학회지
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• 제21권6호
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• pp.433-438
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• 2013

This study was conducted to obtain the basic data for using the Artemisia anuua as a new economic crop, thus Artemisia anuua was investigated their cultivation characteristics, yield, and variation of artemisinin contents by planting density and harvesting times. Seed characteristics of A. anuua have observed micro-size, and their germination optimum temperature was at 15 to 20 celsius degree. Planting density on the yield of A. anuua was increased high density better than low density. The highest yield was planted in the space of $30{\times}10$cm. Moreover, optimum harvesting time of A. anuua was investigated in early september and a periods of most highly detected artemisinin was time of before and after blooming of A. anuua.

• Journal of Forest and Environmental Science
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• 제38권4호
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• pp.256-262
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• 2022

The timing of seed harvesting is an important decision in the management of seed orchards because it affects seed quality and yield. To investigate the effect of cone harvest time on seed quality and determine the optimal harvesting time, cones were regularly collected in seven times and germination tests were performed at each harvest time in two clonal seed orchards of Chamaecyparis obtusa. As cones developed, the percentage of seed germination increased before cone moisture content began to decrease significantly. The moisture contents of cones were highest at the first collection as 68.3% and 67.3% in Jeju and Gochang seed orchards respectively. At this time, germination speed was slowest, indicating poor seed vigour. The highest germination was found at the second stage in Jeju (36.5%) and at the seventh stage in Gochang (28.6%) seed orchard. The germination speed increased as cone moisture content decreased. Additionally, changes of seed vigour differed among the developmental stages in both seed orchards. Consequently, the optimal cone harvest time of C. obtusa seed orchards in Jeju was early September when high germination percentage was obtained. In Gochang seed orchards, late October was optimal cone harvest time when the germination speed was fast and the cone moisture content decreased.

• 한국작물학회지
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• 제34권1호
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• pp.30-39
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• 1989

옥수수 흑조위축병 발생이 심함 남부지방에서 호밀 - 옥수수 작부체계와 옥수수 - 귀리 혹은 옥수수 - 유채 작부체계의 사료생산성을 비교하기 위하여 1986-1987년에 시험을 하였다. 호밀(팔당호밀)은 1986년 가을에 파종하여 1987년 4월 5일부터 5월 10일까지 5일간격으로 8회 수확하엿고, 옥수수(수원 19호, 진주옥)는 4월 5일부터 10일 간격으로 5회 파종하여 황연기에 수확하였으며, 귀리(메귀리)와 유채(Velox)는 9월 4일부터 7일간격으로 4회 파종하고 11월 10일부터 12월 10일까지 10일 간격으로 4회 수확하여 파종기와 수확기별로 담근먹이와 청예수량, 및 사료가치을 분석하여 옥수수를 중심으로 한 작부체계 사료생산성을 비교하였다. 1. 호밀은 수확기가 늦을수록 초장, 건물수량, 건물비율, 조섬유, 가소화 건물수량은 증가하였으나 조단백질, 조지방, 건물소화률은 감소하였고, 가용성 무질소물은 수확기간에 차이가 없었다. 2. 옥수수는 파종기가 늦을수록 흑조위축병 이병률이 높았고 담근먹이의 수량은 감소하였다. 품종간에는 어느 파종기에서나 진주옥이 수원 19보다 흑조위축병 이병률은 낮고 수량은 높았다. 3. 귀리와 유채는 파종기가 늦을수록 수량이 감소하였다. 9월 4일과 11일 파종의 11월 10일 수확에서는 귀리가 유채보다 수량이 낮았으나 수확기가 늦을수록 차이가 적어져 12월 10일에는 차이가 없었다. 그러나, 9월 18일과 25일 파종에서는 어느 수확기에서나 귀리가 유채보다 수량이 낮다. 4. 사료의 생산성과 사료가치를 고려하면 호밀 - 옥수수 작부체계는 4월 20일경에 호밀을 수확하고, 4월에 가능한 한 빨리 파종하여 8월 중순에 수확하고 곧 귀리나 유채를 파종하여야 하며 수량성은 호밀 - 옥수수 작부체계와 비슷하였다.>30cm의 재식밀도하에서 유효경 비율이 90% 이상되었다.^{\circ}C$처리기간중에는 근의 부위에 관계없이 Rf치가 낮은 쪽에서는 증가하였으나 높은 쪽에서는 상대적으로 감소하였다. 4. 이상의 결과를 종합하여 보면 인삼근에 있어서 신아의 휴면타파 및 맹아는 ABA와는 별로 관계가 없고 온도숙건에 지배되어 나타나는 GA의 생합성 능력과 그 생합성에 의한 활성증가와 밀접한 관계가 있는 것으로 추정된다.는 0.2045, 0.1208, 0.2248로 추정되었다. 산란율과 난중과의 관계는 0.6233, -0.2259, 0.2973, 500일영 체중과는 0.2417, 0.0774, - 0.4787로 추정되었다. 산란지수와 난중과의 관계는 0.6171, -0.2706, 0.4579, 500일영 체중과의 관계 0.3082, -0.0792, -0.3368로 추정하였다. 난중과 500일영 체중과의 관계는 0.2742, 0.2205, 0.1354로 추정되었다.)에서 47.4％의 가장 높은 검색률을 나타내었고 다음 성계(150일영이상)에서 35.3％ 및 유추(30 일영미만)에서 17.3％의 순이었다. 이중 세균성 및 기생충성 질병은 육성계에서의 검색률이 가장 높았으나, 바이러스성 질병은 육성계 및 성계에서 거의 같은 비율로 높았으며 곰팡이성 질병은 유추에서 가장 높은 검색률을 나타내었다.17) 사료비절감은 생산비의 60∼70％를 차지하고 있으므로 공동구인 자가배합을 하여 자기실정에 맞는 경영체질로 운영하고 있었다. (18) 인건비가 생산비의 15∼20％의 비율이며 또한 사람 구득난이라 가족노동을 최대한 활용, 관리를 하고 있으며 생력화를 위해 기계화, 자동화되어 가고 있었다. 애정과 정성심있는 관리로 닭을 스트레스를 주지 않게 하기 위해 가족관이, 기계자동화가