‘수마니(Soomany)’ 품종은 일반 곰취를 모본으로 하고 한대 리곰취를 부본으로 해서 교배 육종을 하였다. 2007년부터 2015 년까지 국립식량과학원 고령지농업연구소 온실 및 노지에서 생육 및 수량 특성을 조사와 선발을 수행하였다. 신품종 ‘수마니’ 에 있어서 엽병귀 색은 연녹색이고 엽병에 털이 있다. 그리고 잎 뒷면에 털이 없어 광택도 없다. 엽맥 밀도는 4등급으로 아주 조밀한 편이다. ‘수마니’ 품종의 2년차 생육 특성은 초장이 77.1 ㎝, 엽장 22.3 ㎝, 엽폭 21.5 ㎝, 엽병장은 57.2 ㎝ 였다. 식물체 크기는 ‘쌈마니’ 품종보다 전체적으로 큰 것으로 나타났다. 추 대기는 8월 25일이었고, 개화기는 9월 19일로 ‘쌈마니’ 품종보다 9일 정도 늦게 꽃이 피었다. 엽수는 주당 149매로 ‘쌈마니’ 품종 133매 보다 16매나 많았다. 그리고 주당 수량도 1,623 g으로 ‘쌈마니’ 품종 1,385 g보다 17%정도 더 많았다. 잎의 경도는 25.8 kg/㎠, 잎의 두께는 0.53 ㎜로 ‘쌈마니’ 품종보다 경도는 약간 강하고 잎은 얇게 나타났다. 그리고 ‘수마니’ 품종은 흰가루병에 대해서 강한 저항성을 나타내었고 품종보호권은 2019년 5월에 품종보호 제192호로 등록되었다.

고랭지 경사지밭에서 아로니아를 재배할 때, 토양에 피복식물을 심어 토양유실을 방지하고 아로니아의 생육 및 수량성도 좋은 피복식물을 선발하고자 한 결과는 다음과 같다. 피복식물별 발생한 잡초는 무처리구(자연종)에 17종, 왕포아풀 처리구 12종, 흰토끼풀 처리구 14종, 들묵새 처리구 15종, 긴병꽃풀 처리구 16종이 발생하였으며 잡초 종류는 총 24종이 발생하였다. 1년에 3회 예취하는 피복식물들의 예취전 초장은 무처리구(자연종)은 73.6 ㎝, 왕포아풀 처리구는 57.5 ㎝, 흰토끼풀 처리구는 36.8 ㎝, 들묵새 처리구는 48.3 ㎝, 긴병꽃풀 처리구는 40.9㎝ 이었다. 초장으로 볼 때는 흰토끼풀과 긴병꽃풀이 피복식물로 적당한 것으로 생각되었다. 피복식물들의 3년차 피복율은 무처리구는 95.0%, 왕포아풀 처리구 100%, 흰토끼풀 처리구 87%, 들묵새 처리구 85%, 긴병꽃풀 처리구는 100%로 왕포아풀과 긴병꽃풀이 가장 높았다. 아로니아의 3년차 주당 수량은 흰토끼풀 처리구에서 1,916 g 으로 가장 많았으며 그 다음이 들묵새 처리구 1,770 g, 긴병꽃풀 처리구 1,766 g, 무처리구 1,098 g, 왕포아풀 처리구 931 g 순이었다. 이상의 결과를 종합해로 볼 때, 고랭지 아로니아 재배시 피복식물은 초장이 작고 옆으로 기는 특성이 있어 빨리 피복이 되고 잡초발생도 적은 긴병꽃풀이 적당하였으며 아로니아 정식후 이랑사이에 긴병꽃풀 묘을 심어 피복 식물로 재배함으로서 수량을 수 있는 것으로 나타났다.

This study was carried out to investigate the optimum cultivation distance for high yielding cultivation of the new variety of Gomchwi in highland and lowland. The test material was used ‘Sammany’ variety and the area was cultivated with a highland of 750 m above sea level and a lowland of 20 m above sea level. The planting distance was 5 treatments of 20 x 20 ㎝, 20 x 30 ㎝, 30 x 30 ㎝, 35 x 40 ㎝ and 40 x 40 ㎝, and the plant was cultivated at 35% shading net in the open field. The annual growth of ‘Sammany’ variety was higher in the highland than in the lowland, but the number of leaves was higher in the lowland than that in the highland. The leaf number per plant was the highest in the 40 x 40 ㎝ plot and the more the planting distance was, the more tendency was. However, the leaf weight per plant was higher in the highland than in the lowland. The number of leaves per 10a were higher in the lowland than that of highland and the tendency was more as the planting distance was narrower. Yields were slightly higher in the highland than that of lowland and the highest treatment plot was 2,983 ㎏/10a in 20 x 20 ㎝. In the second year, the growth was high in the highland, and the highland was high in the leaf number and leaf weight and the same tendency in the yields. Among the planting distances, Yields in both areas were the highest in the 20 x 20 ㎝ treatment, with 3,369 ㎏/10a in lowland and 7,257 ㎏/10a in highland. The growth of the third year was slightly better in the highland than that of the lowland but the difference was not significant. However, the number of leaves and leaf weight per plant were higher in the lowland than that of highland. And, in terms of leaf number and yield per 10a, it was also higher in the lowland than that in the highland. The narrower the planting distance was increased yields, and the highest yield was 6,051 kg/10a in 20 x 20㎝. The lowland was high in yield until the third year, but the highland was the highest in the second year and decreased slightly in the third year. The narrower the planting distance in the both areas, the higher the yield, and the leaf size tended to be small.

The purpose of this study was to investigate the effects of envrionmental factors on the ecological responses, yield, and quality properties and physicochemical characteristics of yacon cultivated in various regions of Korea. Experiments were carried out in eight regions from 2010 to 2013. The temperature range in Jinbu, Bonghwa, Cheolwon, and Gangneung during the growth period of yacon cultivation was 17.5-24.6°C. The total yield and marketable yield of tuberous root in Jinbu were 4,065 and 3,196 kg/10a, respectively. The sugar content of yacon tuberous roots comprised 0.11-0.20% fructose, 0.11-0.37% glucose, 0.39-0.68% sucrose, 0.07-0.37% reducing sugar, and 7.03-9.62% fructo-oligosaccharides. The content of fructo-oligosaccharides, which is a functional substance, was the highest in yacon cultivated in Jinbu. Based on the productivity and functional fructo-oligosaccharides, the optimum areas to cultivate yacon are Jinbu and Bonghwa, which are located in the middle-highland zone (500-560 m) and have a suitable growth temperature of 18-25°C. The results of the present study indicate that temperature could be the factor with the greatest influence on the root growth of yacon.

A new Gomchwi cultivar ‘Damogy ’ was bred by crossing between Gomchwi (Ligularia fischeri (Ledeb.) Turcz.) and Handaeri-gomchwi (Ligularia fischeri var. spiciformis Nakai). The selection and investigation of growth and yield characteristics were conducted from 2006 to 2011 in field and greenhouse of Highland Agriculture Research Institute, NICS, Rural Development Administration, Korea. On a newly developed cultivar ‘Damogy’, Color of petiole ear was purple, petiole trichome was exist, light of leaf back was not exist, and density of leaf vein was degree 4. Plant height, leaf length, leaf width and petiole length were 45.9, 16.9, 21.1 and 29.0 ㎝, respectively in the 3rd year in growth characteristics. Plant size was also higher than that of Gondalbi. Bolting and flowering time were Aug. 23th and Sept. 10th, respectively. In contrast, Gondalbi showed quite earlier bolting time more than 38 days compared with ‘Damogy’ and consequently earlier flowering time more than 26 day. ‘Damogy’ showed similar leaf number (129) per plant compared to ‘Gondalbi’ (130). Furthermore, yield was higher ‘Damogy’ (1,889 g/plant) than in ‘Gondalbi’ (798 g/plant). ‘Damogy’ showed higher leaf thickness (0.71 ㎜) than ‘Gonalbi’ (0.46 ㎜), and consequently showed more hardness in leaf characteristics (28.3 ㎏/㎠) compared with ‘Gondalbi’ (23.0 ㎏/㎠). ‘Damogy’ showed higher resistance in the susceptibility of powdery mildew disease compared to ‘Gondalbi’. ‘Damogy’ variety was registered plant variety protection right as a No. 89 on December 2015.

To establish cultivation areas for the stable production of yacon, this study investigated the productivity and functional component contents of yacon in eight regions of Korea from 2011 to 2013. The results of principal component analysis using these data were as follows. A survey of 16 agricultural traits and meteorological data in the eight yacon cultivation areas showed that five factors (average temperature, maximum temperature, minimum temperature, frost-free days, and fructooligosaccharide content) were highly significant at the p < 0.001 level. Among the 16 agricultural traits and meteorological data used in the main component analysis of yacon cultivation areas, approximately eight contributed to the first principal component, and approximately four contributed to each of the second and third principal components. In particular, factors related to productivity, fructooligosaccharide content, and temperature change were considered important criteria for the classification of cultivation areas. The cultivation areas were divided into three groups by principal component analysis. In Group I, containing the Jinbu and Bonghwa areas in the mid-highland region at 500–560 m above sea level, the product yield was the highest at 2,622–3,196 kg/10a, the fructooligosaccharide content was also the highest at 9.04–9.62%, and the mean temperature was 17.3–18.5℃. In Group II, the areas Suncheon, Okcheon, Yeoju, and Gangneung, at 20–180 m above sea level, had the lowest yield, relatively lower fructooligosaccharide content, and the highest temperature. The areas in Group III showed values intermediate between those of Group I and Group II. For the different yacon cultivation areas, the product quantity and fructooligosaccharide content differed according to the environmental temperature, and the temperature conditions and number of frost-free days are considered important indicators for cultivation sites. Therefore, in terms of producing yacon with high quality, cultivation at 500–560 m is considered to give a higher yield and functional fructooligosaccharide content.

A new Gomchwi cultivar ‘Gommany’ was bred by crossing between Gomchwi (Ligularia fischeri (Ledeb.) Turcz.) and Handaeri-gomchwi (Ligularia fischeri var. spiciformis Nakai). The selection and investigation of growth and yield characteristics were conducted from 2006 to 2011 in field and greenhouse of Highland Agriculture Research Institute, NICS, Rural Development Administration. The color of petiole ear was purple. Petiole trichome existed, but light of leaf back did not. Density of leaf vein was 5 degree in a newly developed cultivar ‘Gommany’. Plant height, leaf length, leaf width and petiole length were 47.7, 16.3, 21.2, and 31.4 ㎝, respectively in the 3 year of growth characteristics. Plant size was also higher than that of ‘Gondalbi’. Bolting and flowering time were Aug. 5 and Sept. 10, respectively. In contrast, Bolting time of ‘Gondalbi’ showed 25 days quite earlier bolting time compared to ‘Gommany’, Which led to earlier flowering time. ‘Gommany’ showed higher number of leaves (138) per plant compared to ‘Gondalbi’ (130). Furthermore, yield was 97% higher in ‘Gommany’ (1,575 g/plant) than in ‘Gondalbi’ (798 g/plant). ‘Gommany’ showed higher leaf thickness (0.69㎜) than ‘Gonalbi’ (0.46 ㎜), and consequently showed more hardness in leaf characteristics (24.3 ㎏/㎠) compared to ‘Gondalbi’ (23.0㎏/㎠). ‘Gommany’ showed higher resistance in the susceptibility of powdery mildew compared to ‘Gondalbi’. ‘Gommany’ cultivar was registered as a novel variety with number 90 in The Minister of the Korea Forest Service on December 2015.

A new research project entitled 「Development of Evaluation and Analysis Technologies for Road Sink」 was initiated last year under the sponsorship of Korea Agency for Infrastructure Technology Advancement and Ministry of Land, Infrastructure and Transport. In this article, outlines of this project is briefly introduced including research goal, scope, current major activities, etc.

Arabis glabra is a localized common rhizomatous flowering plant, This plant is often used in Korean traditional systems of medicine as a remedy for blood cleaning, detoxification, abscess, gastrospasm, arthritis, contraction and diarrhea. Generally drugs that are used for arthritis have antinociceptive and anti-inflammatory properties. However, validity of the anti-inflammatory activity has not been scientifically investigated so far. Therefore, the aim of this study was to investigate the anti-inflammatory potential of A. glabra using the ethanolic extract and its sub-fractions. To evaluate the anti-inflammatory effects, we examined the inflammatory mediators such as nitric oxide (NO) and prostaglandin E2 (PGE2) on RAW 264.7macrophages. Our results indicated that hexane and chloroform fraction significantly inhibited the LPSinduced NO and PGE2 production in the cells. The hexane fraction inhibitory activity for NO tests with IC50 values showed in 21.0 ㎍/㎖. The chloroform fraction inhibitory activity for PGE2 tests with IC50 values showed in 18.0 ㎍/㎖. These efficacy are expected to be able to present the potential for the development of health functional food for the prevention inflammatory diseases because it has sufficient preventive medical possibilities. Further, it is determined that it is necessary to further study the mechanism of cytokine and protein expression associated with inflammation.

There has been little research on the harvesting time-dependent changes in the antioxidant activities of new varieties of highland cultures of Gomchwi (Ligularia fischeri) crossed with Turcs (Ligularia fischeri (Ledeb.)) and Nakai (Ligularia fischeri var. spiciformis), namely Sammany (S), Gommany (G) and Damogy (D). This study was conducted to assess the effect of different harvesting times on nutritional and health-related properties such as total phenolic contents, flavonoids, DPPH (1,1-diphenyl-2-picrylhydrasyl) free radical scavenging activities and reducing power. From these harvests, extracts were prepared using methanol. Total phenolic content in Jul 14-G (Gommany harvested on July 14, 0.172 ㎎·GAE/㎖) was higher than that in other products harvested after the same period (S, 0.154; D, 0.141 ㎎·GAE/㎖). Flavonoid content was higher in Jul 3-G (0.114 ㎎·QE/㎖), compared to Jul 3-S (0.113 ㎎·QE/㎖) and Jul 14-D (0.089 ㎎·QE/㎖). Antioxidant activities were higher in samples harvested after June 12 in all cases. On July 14, the highest DPPH free radical scavenging activities among all harvest dates were seen (92.875~94.595%). The reducing power was also dependent on harvest day (Abs 0.5~0.6 on July 14), showing a pattern similar to that of DPPH free radical-scavenging activities. Antioxidant activity and harvesting times seem to correlate with total polyphenol and flavonoid contents.

Steel cables are frequently used for various infrastructures. Especially the steel cables in long span bridges are critical members Damage at cable members can occur in the form of cross sectional loss caused by corrosion and fracture. Therefore, NDE of steel cable is needed to measure the cross-sectional damage. In this study, Total Magnetic Flux sensor system was applied to monitor the condition of cables. This system measures total magnetic flux to detect the loss of metallic cross section area(LMA) of steel cable. To verify the feasibility of this study, 2 types of steel bar were fabricated and their output values measured by the search coil in total flux sensor.

This study was carried out to evaluate nitrogen availability of applied fertilizer and to investigate yield and growth of Chinese cabbage as affected by amount of fertilizer and soil fertility in organic farming applied various fertilizers in rainshelter. The head weight of Chinese cabbage cultured in infertile soil (sand loam) with no amendments was very low. and that in fertile soil (clay loam) was higher than in infertile soil (sand loam). The head weight of Chinese cabbage as affected by amount of fertilizer was more variable in infertile soil (sand loam) than in fertile soil (clay loam). Nitrogen availability of applied fertilizer by Chinese cabbage was lower in fertile soil (clay loam) than in infertile soil (sand loam) and the lower that was, the more fertilizer applied. By application of poultry manure compost 20Mg ha-1 and natural mineral materials such as guano, phosphate rock, and potassium magnesium rock equal to amount of fertilizer recommended in conventional farming, the yield of Chinese cabbage in infertile soil (sand loam) with 1% organic matter came up to 90% of the yield in fertile soil (clay loam) with 6% organic matter. Therefore natural mineral materials such as guano for N source, phosphate rock for P source, and potassium magnesium rock for K source may be able to use as environmental-friendly fertilizers in organic Chinese cabbage production in highland.

국내 재배 당근 품종은 대부분 수입에 의존하고 있어 국내 당근산업의 기반을 유지하고 경쟁력 확보를 위하여 우수한 품종을 개발 보급하고자 본 ‘그라운드 킹’을 육성하였다. 근형은 원추형이고, 근피색, 근육색 및 심색은 주황색으로 근피가 매끈하다. 숙기는 중만생종이고, 육질이 연하고 수분이 많다. 병해 저항성은 검은잎마름병 및 흰가루병이 중간 정도로 대비품종인 ‘양면’과 비슷하고, 추대에 다소 약하므로 조기 파종 할 때 추대 위험이 있다. 수량은 3,228 kg/10a이고, 근장은 16.3 cm, 근중은 171.0 g으로 대비품종 ‘양면’ 166.5 g과 비슷하다. 추대율은 3.9%로 양면 5촌의 2.4%보다 다소 높아 조기 파종시 추대의 위험이 있으므로 적기에 파종하여야 한다.

Since cable members are the major structural components in cable bridges, they should be properly inspected for surface damage as well as inside defects such as corrosion and/or breakage of wires. In this study, only the vision-based surface damage detection system based on image processing techniques is addressed. The damage detection programs are consist of real-time and post processing detection programs. The proposed damage detection programs were verified through laboratory tests on many types of cables.

Since cable members are the major structural components in cable bridges, they should be properly inspected for surface damage as well as inside defects such as corrosion and/or breakage of wires. Starting from August 2010, a new research project supported by Korea Ministry of Land, Transportation Maritime Affairs (MLTM) was initiated to develop the cable inspection robot. In this study, only the vision-based surface damage detection system based on image processing techniques is addressed. The damage detection algorithm combines some image enhancement techniques with principal component analysis (PCA) to detect damages on cable surface. The images from three cameras attached to the cable climbing robot are wirelessly transmitted to the server computer at the cable support. They are processed with image enhancement method together with noise removal technique to improve overall image quality. Then they are projected into PCA sub-space. Finally, the Mahalanobis square distances of the projected images to all sample patterns are calculated. The smallest distance is found to be the match for the input image. The proposed damage detection algorithm was verified through laboratory tests on three types of cables.