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소형 사각 곤포기를 이용한 옥수수 사각 압축곤포 사일리지 조제에 관한 연구
최기춘(Ki Choon Choi),조남철(Nam Chul Cho),정민웅(Min-Woong Jung),김종근(Jong Geun Kim),신재순(Jae Soon Shin),이경동(Kyung Dong Lee),임영철(Young Chul Lim),김원호(Won Ho Kim),오영균(Young Keun Oh),김천만(Cheon Man Kim),김혁기(Hyuk Gi 한국초지조사료학회 2011 한국초지조사료학회지 Vol.31 No.1
본 시험은 수확시기가 옥수수 사각 압축곤포 사일리지의 품질에 미치는 영향을 구명하기 위하여 2009년부터 2010년까지 국립축산과학원에서 수행되었다. 옥수수 사일리지 전용 품종인 광평옥을 이용하여 숙기별 3회(유숙기, 황숙기 및 완숙기)에 걸쳐 수확을 하여 사일리지로 조제하였다. 숙기가 진행됨에 따라 옥수수 원형곤포 사일리지의 조단백질 함량은 감소하는 경향을 보였으나(P<0.05) ADF 및 NDF 함량은 차이가 나타나지 않았다. 그리고 TDN 및 in vitro 건물소화율도 비슷하였다. 숙기별 수분함량, pH 및 사료가치는 사일리지 제조 방법 및 젖산균에 의해 영향을 받지 않았다. 유숙기에서 옥수수 사각 압축곤포 사일리지의 젖산 함량은 원형곤포 사일리지보다 현저하게 증가하였으나(P<0.05) 황숙기에서는 현저하게 감소하였다(P<0.05). 숙기별 사각 압축곤포 사일리지의 초산 함량은 원형곤포 사일리지보다 현저하게 감소하였다(P<0.05). 유숙기에서 옥수수 사각 압축곤포 사일리지의 Flieg’s score는 원형곤포 사일리지보다 약간 증가하였으나 황숙기와 완숙기에는 비슷한 경향을 나타냈다. 그리고 옥수수 사각 압축곤포 사일리지와 원형곤포 사일리지의 Flieg’s score는 젖산균에 의해서 영향을 받지 않았다. 따라서 본 연구에서는 옥수수 사각 압축곤포 사일리지는 새로운 사일리지 제조방법이 될 수 있고 또한 양질의 옥수수 사일리지 발효에 적합한 것으로 나타났다. This study was conducted to investigate the effect of harvest stage of corn on the quality of square baled corn silage manufactured with corn grown in paddy land of Department of Animal Resources Development, National Institute of Animal Science, RDA from 2009 to 2010. Corn “Kwangpyungok” was harvested at three different growth stages (milk, yellow ripen and ripen stage) and ensiled at each harvest time. Square baled corn silage was manufactured by use of square silage wrapping compressor. Each treatment was replicated three times. The content of crude protein (CP) of corn in square baled corn silage decreased with delayed maturity, but the content of ADF (acid detergent fiber), NDF (neutral detergent fiber), TDN (total digestible nutrient) and in vitro dry matter digestibility (IVDMD) were not changed. The content of moisture, pH and the nutritive values at three different harvest stages were not influenced by the method of silage manufacture and inoculant. The content of lactate of square baled corn silage harvested in milk stage of corn was significantly increased, as compared with that of round baled corn silage (P<0.05), but in stage of yellow ripen was significantly decreased (P<0.05). The content of acetate in square baled corn silage significantly decreased with delayed harvest maturity, as compared with that of round baled corn silage (P<0.05). Flieg’s score of square baled corn silage harvested in milk stage of corn was slightly higher than that of round baled corn silage, but Flieg’s scores in yellow ripen stage and ripen stage were not influenced by the method of silage manufacture. Flieg’s score with delayed maturity was not influenced by the method of silage manufacture and inoculant. The manufacture of square baled corn silage was proved to be suitable for the fermentation of corn silage. Therefore, this study suggest that square baled corn silage can be a way of new silage manufacture technique.
논에서 생산된 옥수수의 수확시기가 곤포사일리지의 사료가치와 품질에 미치는 영향
최기춘(Ki Choon Choi),조남철(Nam Chul Jo),정민웅(Min-Woong Jung),이경동(Kyung Dong Lee),김종근(Jong Geun Kim),임영철(Young Chul Lim),김원호(Won Ho Kim),오영균(Yung Keun Oh),최진혁(Jin Hyuk Choi),김천만(Cheon Man Kim),정두근(Du Keun J 한국초지조사료학회 2011 한국초지조사료학회지 Vol.31 No.1
본 시험은 수확시기가 옥수수 원형 곤포사일리지의 품질에 미치는 영향을 구명하기 위하여 2009년부터 2010년까지 국립축산과학원에서 수행되었다. 옥수수 사일리지 전용 품종인 광평옥을 이용하여 숙기별 3회(유숙기, 황숙기 및 완숙기)에 걸쳐 수확을 하여 사일리지로 조제하였다. 숙기가 진행됨에 따라 옥수수 원형 곤포사일리지의 조단백질과 TDN 함량은 감소하는 경향을 보였으나 섬유소인 NDF 및 ADF 함량은 증가하였다. 그리고 숙기별 in vitro 건물소화율은 비슷하였다. 숙기별 사일리지의 pH는 3.8~4.0을 유지하였으며, 숙기별 차이는 크지 않았다. 또한 생육이 진행됨에 따라 초산 함량은 감소되었으나 젖산 함량은 증가되었다. 그리고 품질등급은 완숙기> 황숙기> 유숙기 순으로 나타났다. 이상의 결과를 종합하여 볼 때 양질의 옥수수 원형 곤포사일리지 제조를 위해서는 황숙기에 수확하여 사일리지를 만드는 것이 옥수수 사일리지 발효를 향상시킬 수 있다. This study was carried out to examine the effect of harvest stage of corn on nutritive values and quality of round baled corn silage manufactured with corn grown in paddy land of Department of Animal Resources Development, National Institute of Animal Science, RDA from 2009 to 2010. Corn “Kwangpyungok” was harvested at three different growth times (milk, yellow ripen and ripen stage) and ensiled at each harvest stages. Crude protein (CP) and TDN (total digestible nutrient) contents of round baled corn silage was decreased and in vitro dry matter digestibility (IVDMD) was not changed with delayed harvest maturity. However, contents of ADF (acid detergent fiber) and NDF(neutral detergent fiber) decreased with delayed harvest maturity. The pH at three different harvest stages ranged from 3.8 to 4.0. The content of lactic acid increased with delayed harvest maturity, but the content of acetic acid decreased. And then, flieg's score reveals that there is an increase in order, ripen stage > yellow ripen stage > milk stage. Therefore, this study suggest that round baled corn silage manufactured at yellow ripen stage can improve the silage quality.
Simulation기반 LOS에 따른 역사 시설별 적정규모 산정
이선하(Seon ha Lee),천춘근(Choon keun Cheon),한정혜(Jeong hye Han),오태호(Tae ho Oh),김은지(Eun ji Kim) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
기존의 철도역사 시설물별 규모산정은 보행자군집밀도, 보행속도, 열차길이 등의 변수고정 후 면적을 산정하여 기존 및 신규역사 적정면적설계가 비효율적으로 이루어졌다. 이를 해결하기 위해서는 Simulation Tool을 활용하여 적정면적에 대한 사전분석이 필요한 것으로 판단된다. 따라서, 본 연구는 계단과 보행자통로 폭원 별 밀도변화에 대한 서비스수준을 Pedestrian Simulation기반으로 분석하여 적정면적 산정을 하였으며, 설계서비스수준에 따른 적정면적 산출결과 계단은 3.5m(서비스수준 D), 보행자통로는 8.0m(서비스수준 E)로 분석되었다. 이와 같이 『철도역사설계지침, 한국철도시설공단, 2012』의 설계서비스수준에 따른 적정면적을 Simulation기반으로 산출함으로써 최적화된 역사설계를 시행할 수 있다고 판단하였다. When it comes to the calculation of scale for each railway station, the proper scale design of existing and new stations were carried out inefficiently as the scale was calculated after fixing the variables such as pedestrian-crowd density, walking speed and length of train. In order to solve that, it was judged that it is required to analyze the proper scale preliminary using simulation tool. So, this study calculated the proper scale by analyzing level of service against density change for each width of stairs and pedestrian deck and based on pedestrian simulation, and as the results of calculating proper scale along the level of design service, it was analyzed that 3.5m (service level D) for the stairs and 8.0m (service level E) for pedestrian deck. Like this, it was judged that the optimal design of station can be realized by calculating the proper scale along the level of design service of 『Design guideline of railway, Korea Rail Network Authority, 2012』 based on simulation.
교통부문 탄소배출 저감을 위한 토지이용계획 기법 개발 및 탄소저감 효과검증
이우민(Lee, Woo-Min),박효숙(Park, Hyo-Sook),천춘근(Cheon, Choon-Keun),이경환(Lee, Kyung-Hwan) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.1
본 연구는 교통부문 탄소배출 저감을 위한 토지이용계획 기법을 개발하고 그 효과를 정량적으로 검증하는데 목적이 있다. 본 연구는 선행연구를 통해 토지이용계획 단계에서 적용할 수 있는 탄소저감 설계요소로 외곽고밀개발, 용도복합을 통한 차량 이동거리 최소화, 보행네트워크 구축, 커뮤니티 회랑을 도출하고 아산 탕정지구에 적용하여 탄소저감 측면에서 개선된 토지이용계획안을 제시하였다. 교통부문 탄소저감 효과를 추정하기 위해서는 VISUM 프로그램을 이용하였다. 분석 결과 교통부문 탄소배출량은 약 17.7% 줄어드는 것으로 나타났으며, 탄소저감량은 약 450.7tCO₂/yr로 나타났다. The purpose of this study was to develop land use planning methods for carbon reduction of transportation and verify the effectiveness. Therefore, this study derived carbon reduction design elements, such as high-density suburb, mixed-use development, pedestrian network and community corridor, which can be applied in the land-use planning stage by examining previous research. The carbon reduction design elements utilized the actual site during the research process. The carbon reductions were estimated using VISUM. Consequently, when carbon reduction design is applied to the site, the carbon emissions declined in the year. As a result of estimating the carbon reduction, approximately 450.7tCO₂/yr was reduced.
Ann Ji-Young,Sa Soo-Jin,Cao Yang,Lee Sang-Young,Cheon Hee-Tae,Yang Boo-Keun,Park Choon-Keun The Korean Society of Animal Reproduction 2006 Reproductive & developmental biology Vol.30 No.2
The present study was conducted to investigate the effects of cumulus cells and porcine follicular fluid (pFF) on plasminogen activator (PA) activity and oocytes maturation in vitro in the pig. The cumulus-oocyte complexes (COCs) and denuded oocytes (DOs) were incubated in NCSU-23 medium with or without 10% pFF for 0, 24, or 48 hr. In the presence of cumulus cells, the proportions of oocytes matured to metaphase-II stage were significantly (P<0.05) higher in medium with pFF than without pFF (69.8 vs. 37.7%, respectively). When COCs and DOs were cultured in the presence of pFF, tissue-type PA (tPA), urokinase-type PA (uPA), and tPA-PA inhibitor (tPA-PAI) were observed in COCs, and PA activities were higher at 48 hr than 24 hr. When COCs and DOs were cultured in the absence of pFF, tPA and tPA-PAI were observed in COCs, and PA activities were increased as duration of culture increased. No PA activities were detected in DOs regardless of pFF supplementation. When porcine oocytes were cultured in the presence of pFF for 24 and 48 hrs, the activities of tPA-PAI, tPA, and uPA were observed in both COCs and DOs. In medium of absence of pFF, PA activities were observed in oocytes with cumulus cells only. On the other hand, three plasminogen-dependent lytic bands (tPA-PAI, tPA, and uPA) were observed in pFF cultures. Particularly uPA activity was higher than the other kinds of PA activity. When oocytes and cumulus cells were separated from porcine COCs at 0 hr of culture, tPA-PAI, tPA, and uPA were detected in cumulus cells at 48 hr of culture, but no PA activities were in DOs. The presence of pFF and cumulus cells in maturation medium stimulated not only nuclear and cytoplasmic maturation in porcine COCs, but also PA production by cumulus cells and COCs. It is possible that PAs produced by cumulus cells migrated through the gap junction between oocyte and cumulus cells. These results suggest that porcine oocytes have no ability to produce PA themselves.