돈분뇨 액비 시용이 양파의 생육, 양분흡수량 및 토양 화학성에 미치는 영향

이종태(Jong Tae Lee),하인종(In Jong Ha),김희대(Hee Dae Kim),문진성(Jin Seong Moon),김우일(Woo Il Kim),송원두(Won Doo Song) 한국원예학회 2006 원예과학기술지 Vol.24 No.2

벼와 양파 2모작 논토양에서 효율적인 돈분뇨 액비 시용을 위하여 액비 시용에 따른 양파의 생육, 양분흡수량 변화와 토양의 이화학적 특성을 조사하였다. 사용된 액비의 질소, 인산 및 칼륨 함량은 각각 4.2, 0.34, 1.2g kg⁻¹ 등이었다. 추비용 액비는 시용 10일 전에 물로 2배 희석하여 월 2회씩 4회와 6회로 나누어 시용하였다. 기비는 질소표준시비량 기준으로 19,280kg ha⁻¹로 시용하였으며 추비에 사용된 액비량은 101,910kg ha⁻¹이었다. 양파의 초장은 정식 136일 후부터 186일까지 급격히 증가하였으며 화학비료구, 액비기비+화학비료 추비구 및 액비기비+액비 4회 추비구 간에는 차이가 없었으나 무비구와 액비전량 기비구는 양분부족으로 생육이 저조하였다. 구 비대초기의 구경은 무비구에서 가장 컸으나 그 이후 화학비료구와 액비시용구에서 크게 증가하였다. 엽 생체중의 변화는 초장과 유사한 경향을 보인 반면 구 생체중은 구경과 비슷한 경향을 나타내었다. 초장과 엽중은 화학비료구와 액비전량 기비구 및 액비기비+액비 6회 추비구간 다소 작았으나 구경, 구중 및 엽수는 처리간 차이가 뚜렷하지 않았다. 양파 구와 잎의 양분흡수량은 전 생육기간에 시그모이드 형을 나타내었으며 잎과 구의 양분흡수량은 각각 잎과 구의 생육이 진전됨에 따라 증가하는 경향이었다. 화학비료구와 액비기비+화학비료 추비구 및 액비 4회 추비구간에 양분흡수량의 차이는 없었고 액비전량 기비구에서 잎의 질소와 칼륨흡수량이, 구의 질소흡수량이 화학비료구보다 적었다. 무비구는 질소, 칼륨 및 마그네슘 흡수량이 다른 처리구보다 적었다. 액비기비+액비 4회 추비구에서 질소와 인산이용률이 각각 23.5%, 13.2%로 가장 높았으나 액비기비+액비 4회 추비구에서 칼륨이용률이 높았고 상품 수량도 55.0Mg ha⁻¹로 가장 많았다. 구의 질소, 인산 및 칼륨함량은 생육이 진전됨에 감소하는 경향이었고 잎의 질소함량은 생육초기에 가장 많은 반면 칼륨함량은 구비대 초기에 가장 많았다. 수확 후 토양 pH, 질산태 질소, 교환성 칼륨 및 EC 농도는 화학비료구보다 액비시용구에서 약간 증가하였다. 본 연구 결과를 종합해 볼 때 돈분뇨 액비를 기비로 시용하고 3배 희석한 액비를 2월과 3월에 4회 추비하면 균형적인 양분공급이 가능하고 적정 수량도 확보할 수있었다. This study was carried out to evaluate the effect of liquid pig manure (LPM) on the nutrient uptake, yield of onion and soil properties. The LPM applied to onion field contained 4.2 g kg⁻¹ N, 0.34 g kg⁻¹ P, 1.2 g kg⁻¹ K and it was diluted with water by 1:2 for top-dressing, which was applied separately 4 or 6 times from February to April. The LPM application rate for basal fertilization was 19,280 kg ha⁻¹ which included 80 kg N, 6.6 kg P, and 22 kg K. The application rate for top-dressing was 101,910 kg ha⁻¹ which included 160 kg N, 13 kg P, and 53 kg K. The plant height was not almost different among treatments until 136 days after planting. Thereafter, it enlarged abruptly until 186 days, on May 4. The significant difference among CF and LPM + top-dressing by CF or LPM I was not shown, but no fertilizer and LPM only (it was applied totally as basal fertilization) made plant height of onion lessen at the maximum growth stage because of insufficient nutrients. The plant diameter increased after 136 days, and there was a significant difference between CF or LPM and no fertilizer from 186 days after planting. The leaf weight was similar tendency to plant height while bulb weight was similar to plant diameter. The amount of nutrient uptake in leaf coincided with leaf growth and the nutrient uptake in bulb swelled simultaneously with bulb growth. The difference between CF and LPM + top-dressing by CF or LPM I was not significant in nutrient uptake of onion leaf and bulb. But LPM only decreased in nitrogen and potassium of leaf and in nitrogen of bulb. And no fertilizer made a remarkable difference to others in nitrogen, potassium and magnesium of leaf and bulb. The utilization of nitrogen and phosphorus in LPM + top-dressing by CF were 23.5%, 13.2% respectively, more than the others. The LPM + top-dressing by LPM I was most available with potassium, and it leaded the most abundant marketable yield by 55.0 t ha⁻¹ as well. The nitrogen, phosphorus, and potassium contents in bulb were inclined to decrease with progress of onion growth. The nitrogen contents in leaf maximized at the initial growth stage while potassium contents increased at the initial bulbing stage. The LPM application increased pH, nitrate nitrogen, potassium and EC in soil more than chemical fertilizer (CF) did.

Survey of Cultivation and Status of Gerbera Smart Farms

Oh Keun Kwon,Jae Ah Jung,Myung Suk Ahn,Hyun Young Song,Manjulatha Mekapogu,Dan Hye Kim,Doo Jong Ha 한국화훼학회 2021 화훼연구 Vol.29 No.4

본 연구는 거베라 주산지인 경북과 경남 지역의 농가 재배 및 스마트팜 현황을 조사하고 분석하고자 수행하였다. 조사방법은 2020년 81 농가를 대상으로 대면 설문조사를 실시하였다. 거베라 경영주 연령은 50∼60대가 71.6%로 가장 많았고, 30∼ 40대가 16%, 70세 이상이 9.9%, 30세 이하는 2.5% 순이었다. 거베라 재배 경력은 5년 이하가 37%였으며, 6∼10년 25.9%, 11∼20년 29.6%, 21년 이상 농가가 7.4%였다. 재배 면적은 0.3 ∼0.6ha가 61.7%로 가장 많았고, 0.3ha 미만이 30.9%, 0.6ha 이상이 7.4%였으며, 전체 평균재배 면적은 0.37ha였다. 거베라 재배 농가당 평균 인력은 자가 노동력 2.1명, 고용 노동력 0.8명 이었다. 재배 방식에서 토경 88.9%, 양액재배 농가는 11.1%였다. 국산품종을 전체 또는 일부라도 재배하고 있는 농가는 61.7%였고 외국산 거베라 품종만 재배하고 있는 농가는 38.3% 였다. 거베라 병해충 발생조사에서 병 발생이 많았다고 응답한 농가는 91.4%였으며, 충 발생이 많았다고 응답한 농가는 98.8% 였다. 스마트팜 시스템을 설치한 농가는 12.3%였으며, 설치하지 않은 농가에서 향후 설치할 의향이 있다고 응답한 농가는 76.9% 였다. 향후 경영계획을 묻는 질문에서 현상유지 80.2%, 축소 8.6%, 경영확대 11.1%였으며, 경영 확대를 대답한 농가는 경북 지역이 8농가로 경남지역 1농가 보다 많았다. This study was conducted to investigate and analyze gerbera cultivation and the status of smart farms in Korea. The survey was conducted in person for 81 farms, in 2020. About 71.6% managers of the gerbera farms were in their 50s and 60s, 16% in their 30s and 40s, 9.9% were over 70, and 2.5% under 30. About 37% of the farmers have cultivation experience of less than five years; 25.9%, 6–10 years; 29.6%, 11–20 years; and 7.4%, over 21 years. Around 61.7% of the area under gerbera cultivation was 0.3–0.6 ha, 30.9% was less than 0.3 ha, and 7.4% was over 0.6 ha; and the average area under cultivation was 0.37 ha. The average family labor of the gerbera farms was 2.1 people and the employed labor was 0.8 people. The cultivation methods included about 88.9% soil and 11.1% nutrient cultivation farms. However, 61.7% of the farmers cultivated all or part of the domestic gerbera varieties, whereas 38.3% only cultivated foreign varieties. In the pest survey, around 91.4% of the farm managers responded to have observed different diseases, and around 98.8% farms exhibited various pests. The smart farm system has been installed by 12.3% of the farming households. However, 76.9% of farming households with no prior smart farms are planning to install them in the future. Future plans include the status quo of 80.2%, reduction in total area by 8.6% and expansion in total area by 11.1%, and around eight farms in Gyeongbuk and one farm in Gyeongnam area are planning to expand their management.

Bloodstream Infections and Clinical Significance of Healthcare-associated Bacteremia: A Multicenter Surveillance Study in Korean Hospitals

Son, Jun Seong,Song, Jae-Hoon,Ko, Kwan Soo,Yeom, Joon Sup,Ki, Hyun Kyun,Kim, Shin-Woo,Chang, Hyun-Ha,Ryu, Seong Yeol,Kim, Yeon-Sook,Jung, Sook-In,Shin, Sang Yop,Oh, Hee Bok,Lee, Yeong Seon,Chung, Doo The Korean Academy of Medical Sciences 2010 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.25 No.7

<P>Recent changes in healthcare systems have changed the epidemiologic paradigms in many infectious fields including bloodstream infection (BSI). We compared clinical characteristics of community-acquired (CA), hospital-acquired (HA), and healthcare-associated (HCA) BSI. We performed a prospective nationwide multicenter surveillance study from 9 university hospitals in Korea. Total 1,605 blood isolates were collected from 2006 to 2007, and 1,144 isolates were considered true pathogens. HA-BSI accounted for 48.8%, CA-BSI for 33.2%, and HCA-BSI for 18.0%. HA-BSI and HCA-BSI were more likely to have severe comorbidities. <I>Escherichia coli</I> was the most common isolate in CA-BSI (47.1%) and HCA-BSI (27.2%). In contrast, <I>Staphylococcus aureus</I> (15.2%), coagulase-negative <I>Staphylococcus</I> (15.1%) were the common isolates in HA-BSI. The rate of appropriate empiric antimicrobial therapy was the highest in CA-BSI (89.0%) followed by HCA-BSI (76.4%), and HA-BSI (75.0%). The 30-day mortality rate was the highest in HA-BSI (23.0%) followed by HCA-BSI (18.4%), and CA-BSI (10.2%). High Pitt score and inappropriate empirical antibiotic therapy were the independent risk factors for mortality by multivariate analysis. In conclusion, the present data suggest that clinical features, outcome, and microbiologic features of causative pathogens vary by origin of BSI. Especially, HCA-BSI shows unique clinical characteristics, which should be considered a distinct category for more appropriate antibiotic treatment.</P>

중국 채소류 생산 관리체계 분석 -산동지역 고추, 마늘, 양파 농가 사례조사 결과-

하두종 ( Doo Jong Ha ),유창환 ( Chang Whan Yu ),최칠구 ( Chil Ku Choi ),조성주 ( Sung Ju Jo ),이종수 ( Jong Zhu Li ) 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.5

1. 본 연구는 중국 산동성의 평도시(平度市) 및 신강성 집단재배농장을 대상으로 주요 채소 농산물인 고추, 마늘, 양파에대하여 한국과 중국의 생산 관리체계 및 기술 수준을 비교ㆍ분석하였다. 2. 고추의 경우 한국은 묘를 구입하여 정식하는 비율이 높지만 중국은 대부분 자가 채종 후 자가 육묘를 하는 체계이다. 가장 특징적인 것은 한국은 수확을 10일 간격으로 5 ~ 6회 하지만, 중국은 일시 수확하여 수확노동력을 줄이고 있다. 고추의 경영비와 생산비 비교에서는 각각 한국이 3,975원/kg,11,686원/kg이며, 중국은 519원/kg, 1,895원/kg으로 한국의 경영비가 7.3배, 생산비는 6.2배 차이가 나는 것으로 조사되었다. 3. 중국의 마늘 파종량은 한국에 비해 3배 이상으로 밀식파종을 한다. 재배 이랑은 한국은 넓은 이랑이며, 중국은 2줄 좁은 이랑에서 재배 하고 있다. 멀칭은 한국이 기계멀칭을 64%하고 있으나 중국은 인력을 이용한 멀칭을 하고 있다 마늘의 경영비와 생산비 비교에서는 각각 한국이 1,128원/kg, 2,049원 /kg이며, 중국은 310원/kg, 686원/kg으로 경영비는 3.6배, 생산비는 3.0배 차이가 나는 것으로 분석되었다. 4. 양파는 중국이 한국보다 경지기반은 좋으나 호당 경지면 적은 0.14 ha로 매우 영세하다. 한국은 복비와 유기질 비료를 사용하고 방제를 3 ~ 5회하는 반면, 중국은 계분을 사용하고, 살균, 살충, 제초 방제는 1회만 실시하고 있다. 육묘는 중국과 한국이 모두 구입종자를 이용한 자가 육묘를 하는 동일한 생산체계이다. 양파의 경영비와 생산비 비교에서는 각각 한국이 199원/kg,334원/kg이며, 중국은 46원/kg, 98원/kg으로 한국보다 경영비는 4.3배, 생산비는 3.4배 차이가 있은 것으로 나타났다. This study was carried out to analyze the Chinese vegetable production system and to compare it with the adopted system in Korea. Farm producing pepper, garlic and onion in Sandong and Singang were surveyed. For pepper production, Korea farm purchased the planting materials while, China farm produced their own seeds and seedlings. Also, the most significant difference was the one time harvesting in China, while Korea usually harvests 5 ~ 6 times within 10 days term per year with an increase in production. The management and production cost were observed to be 3,975 won/kg, 11,686 won/kg for Korean pepper, but China has low cost by 519 won/kg, 1,895 won/kg. An amount of garlic seed in China was more than three times that of Korea. Korea covered the wide furrow with mulching plastic and used machines that raised the production rate by 64%. However, Chinese depends on the human labor and make narrow furrow to increase the productivity. The management and production cost were 1,128 won/kg, 2,049 won/kg for Korean garlic, while China has low cost by 310 won/kg, 686 won/kg respectively. To cultivate onion, the land condition of China was better than Korea having an average farm size of 0.14 ha smaller than Korea. Two nations were compared having the same seedling production system that buy the seed at the market and seedling their own land. Likewise, the management and production cost observed as 199 won/kg, 334 won/kg for Korean onion, while Chinese cost was lower by 46 won/kg, 98 won/kg. It is concluded that the good producing system of China such as pepper one-time harvesting system should be adopted to korean farm system to reduce cost.

고견실성을 갖는 Servo 制御器의 設計

河泓坤,高泰彦,朴斗煥 東義大學校産業技術開發硏究所 1992 産業技術硏究誌 Vol.6 No.-

In this paper, the method of a design on a servo-controller with high stiffness free from change of load and influence of disturbance is proposed. A new controller is derived from adopting input side and output side detecting signals of the oscillatory element, which are processed through an each element being its relative degree equal to zero and are combined to generate a feedback information. By using the controller a Servo-Control System with a velocity and a accelaration control loop is organized and comes to show load insensitivity.

한국농가의 농업자원이용과 경제적 효율성 분석

하두종,황홍도 경상대학교 농업생명과학연구원 2004 농업생명과학연구 Vol.38 No.1

이 연구의 목적은 2002년 농가경제조사 원자료를 이용하여 경지규모별, 지대별로 농업생산함수를 추정하여 농업생산자원의 이용과 경제적 효율성을 계량적으로 분석하고, 이러한 계량 분석결과를 이용하여 우리나라 농가에서 농업소득 증대를 위한 효율적 자원이용 방안을 제시하는데 있다. 농업생산함수의 추정과 분석결과, 우리나라 농가는 경지규모별, 지대별로 농업자원이용의 비효율성이 현저하게 나타났다. 따라서 개별농가에서 농업자원이용의 경제적 효율성을 개선하기 위한 경영지도나 농업생산시책 등이 마련 될 필요가 있다. This study intends to examine comparison of resource productivity and economic efficiency by size of cultivated land and zone by estimating Cobb-Douglas production functions for individual farm household. The estimated output elasticities and the estimated economic efficiencies of land, labor and capital inputs appear to be significantly different by the size of cultivated land and zone. The sum of elasticities of production function in the farm household by size of cultivated land varied widely, ranging from 1.047 to 1.214. The sum of elasticities of production function in the by zone range between 1.082 and 1.185. The ratios of marginal products to opportunity cost for labor and capital input are significantly different from unity. According to this study, much of farm household need to improve economic inefficiency of land, labor and capital inputs for maximizing profit as well as for achieving efficiency of farm resources.

주파수 대역별 PN부호화 연산을 통한 이미지 워터마킹

하진일,박수형,주동현,염동훈,김두영 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.10 No.1

Recently develpoing of the internet technology and spreading of the variable digital media are caused the problems. They are to protect the copy and to preserve the copyright. It is that the resolution is digital watermark. This paper is research about digital watermark that is to strengthend by PN encoding after Wavelet transform.

원발성 연수 출혈증 1예

하현욱,한정호,이정석,송은향,김우정,김두응,최진영 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Pure primary medullary hemorrhage is a rare condition, which is characterized by ipsilateral hypoglossal nerve palsy and contralateral hemiparesis. The hemorrhage usually extended to medial and ventral medulla, these two characteristic signs distinguished from the classical presentation of Wallenberg's lateral medullary syndrome. A 53-years-old man was admitted with sudden onset left sides weakness and vertigo. Neurologic examination showed dysarthria, mild dysphagia, Horner syndrome of right side, spontaneous horizontal jerking nystagmus to left side and right deviation of tongue at protrusion. Pain and temperature sensation of left trunk, left extremity and right face were decreased. Brain CT scan and brain MRI revealed focal hemorrhage in the right medulla. We report a case of pure primary medullary hemorrhage with undetermined etiology.

한국에서의 미국지역 연구현황과 과제

류두하 계명대학교 국제학연구소 2002 국제학논총 Vol.7 No.-

This paper aims to clarify current state and problems of American Studies in Korea. The focus of this study, therefore, will be placed on the significance and purposes of American Studies in Korea as well as in the U.S., general trend and characteristics of American Studies in Korea from the 1950s to 2000, and problems faced by current American Studies in Korea. Due to historical background, economic demand, as well as strategic considerations, American Studies in Korea has been mostly confined to politics, diplomacy, national security, and economy, among all the related academic fields. Added to this, the scope of most of these studies are limited to researches in related books and other materials and introduction of their contents, with little attempt to explore new related materials or new innovative analytical approaches to be applied to existing research results. Among all the extensive research papers in the field of American Studies, this paper limits its subjects to masters or doctors theses published in Korea, and analyzes changes in their general trend by decade. A notable problem in the field of American Studies in Korea is the fact that most researches generate only policy-oriented papers, rather than attaching any significance to academic approaches. In other words, their research methods or purposes are too much influenced by political or economic considerations. In the field of politics, studies are focused on political structures, history of political parties, and governmental policies. In economic field, focus is on changes in economic as well as international trade policies, industrial structure, investment of Korean firms in the U.S., and analysis of economic growth. In the post-cold war era, national policies have been notably shifted toward the pursuit of national or regional interests. In the same vein, the field of American Studies in Korea should find ways to broaden its perspective to fit its own purpose so as to achieve general understanding of all related fields of American society including its history, culture, and religion, rather than confining its scope to the economy or diplomacy of the U.S.

퍼지추론기법을 이용한 2-자유도 비선형 모형 헬리콥터의 자세 제어

朴斗煥,李俊柝,河泓坤 東義大學校産業技術開發硏究所 1998 産業技術硏究誌 Vol.12 No.-

The helicopter system is non-linear and complex. Futhermore, because of absence of an accurate mathematical model, it is difficult accurately to control its attitude. Therefore, we propose a fuzzy control technique to control efficiently its elevation angle and azimuth one. This controller is on the basis of expert's knowledges and his experiences. The simulation results using MATLAB are introduced.