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식생매트가 국화 ‘Ford’의 발근 및 생육에 미치는 영향
남유경(Yukyeong Nam1),이진희(Jin-Hee Lee),정기령(Gi-Ryeong Jeong) (사)한국생물환경조절학회 2011 시설원예‧식물공장 Vol.20 No.4
이 연구는 화단용 국화의 식재 효율성을 높이기 위한 목적으로 기존에 개발된 식생매트에 삽수를 이용하여 최적의 매트조건을 구명하고자 수행하였다. 8가지 처리 조건의 매트에 Dendranthema grandiflorum ‘Ford’를 삽목하고 난 후 50일 후 생육을 조사한 결과, 매트 내 뿌리 분포는 10mm 두께의 중간에 배양토를 삽입한 coir net(C 처리)에서 가장 좋았고, 초장과 지상부 생체중도 각각 29cm, 5.6g으로 동일 조건에서 가장 높은 값을 나타냈다. 뿌리가 형성된 매트를 포장에 정식 40일 후 초장은 12㎜ 두께의 중간에 배양토를 삽입한 Jute net가 가장 좋았으나, 지상부 생체중은 C 처리와 차이가 없었다. 매트 내 뿌리 형성과 정식 후 삽수 길이별 생육은 길이 5㎝인 삽수가 3과 8㎝인 것 보다 좋은 결과를 나타냈다. This study was aimed to select the optimal mat condition using existing plant-mats for the efficient planting of bedding Chrysanthemum. At fifty days after cutting with Dendranthema grandiflorum ‘Ford’, root formation among the treatments using eight different mats outstood with the treatment using 10 ㎜ thick coir net, which has medium inserted between mat layers - called C treatment, compared to other treatments; this treatment had the highest values in the plant height and shoot fresh weight, which were 29 ㎝ and 5.6 g, respectively. On the contrary, in 40 days after transplanting root-formed mats to field, 12 ㎜ thick jute net, which has medium inserted between mat layers, had the highest plants compared to other treatments. However, there was no significant difference in shoot weight compared to C treatment. In experiment of different lengths of cut, the results of growth after transplanting showed that 5 cm long cut performed best compared to 3 and 8 ㎝ long cuts.
지역에 따른 식재가 가든멈 네 가지 품종의 생육에 미치는 영향
이규민(Kyu Min Lee),남유경(Yukyeong Nam) 인간식물환경학회 2014 인간식물환경학회지 Vol.17 No.4
The experiment was carried out to investigate effects of different planting locations on the growth of 4 different cultivars(Kumbangul, Magic Ball, Pretty Ball, and Shinny Ball) of garden mum(Dendranthema grandiflorum) cultivars planted in Cheonan, Jeju, and Pocheon locations, respectively from May to October in 2012. The results of soil analysis showed that soil texture of both Jeju and Cheonan locations was all loamy sands and that of Pocheon was sandy loam. Soil of both Pocheon and Cheonan was weak acid(pH 6.2) and netural(pH 7.8), respectively, whereas the pH of Jeju soil was the lowest 4.9. The lowest content of available phosphorus was showed in Cheonan. Average temperature was 23.17℃ in Jeju where it was the highest among 3 locations whereas Pocheon showed the lowest 19.80℃ during investigated periods. In plant width, ‘Pretty Ball’ and ‘Shinny Ball’ planted respectively in Jeju and Pocheon, showed the optimum value but two other cultivars have no distinct relation with planting locations. Regardless of cultivars, number of flowers and weight of all cultivars planted in Jeju than any other location showed the highest values. Overall results showed that quantitive characteristics of ‘Kumbangul’ was superior to other cultivars and cultivars planted in Jeju were better than other culivars based on planting locations.
RF 플라즈마 처리법에 기반한 기계적 밀링된 Zr 분말의 구형화에 따른 특성 변화
이유경,최미선,박언병,오정석,남태현,김정기,Lee, Yukyeong,Choi, Mi-Sun,Park, Eon Byeong,Oh, Jeong Seok,Nam, Taehyun,Kim, Jung Gi 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.2
Powder quality, including high flowability and spherical shape, determines the properties of additively manufactured products. Therefore, the cheap production of high-quality powders is critical in additive manufacturing. Radio frequency plasma treatment is an effective method to fabricate spherical powders by melting the surface of irregularly shaped powders; in the present work, mechanically milled Zr powders are spheroidized by radio frequency plasma treatment and their properties are compared with those of commercial Zircaloy-2 alloy powder. Spherical Zr particles are successfully fabricated by plasma treatment, although their flowability and impurity contents are poorer than those of the commercial Zircaloy-2 alloy powder. This result shows that radio-frequency plasma treatment with mechanically milled powders requires further research and development for manufacturing low-cost powders for additive manufacturing.