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김찬용 ( Chan Yong Kim ),김창배 ( Chang Bae Kim ),김종수 ( Jong Soo Kim ),서영진 ( Young Jin Seo ),윤재탁 ( Jae Tak Yoon ) 한국환경농학회 2002 한국환경농학회지 Vol.21 No.3
A study was conducted to investigate the seasonal changes in water quality of watershed in the Agricultural Environment Promotion Zone. samples collected were 12 GW (ground water), 2 IW (irrigation water), 2 SW (stream water) in An-Doug City, 4 GW, 6 IW, 11 SW in Young-Yang Gun, and sampling was conducted separately during dry and rainy season. In the ground water, EC and ionic species, except pH, were higher than those in stream water, and especially NO_3-N concentration exceeded the limitation of drinking water. Concentration of ions decreased as the sampling depth was far from the soil surface. During a rainy season, the concentrations of NO_3-N and K In the stream water were slightly higher than those during season. COD was lower during dry season in Yong-Yang, while the trend was contrasted to An-Doug. These results suggest that ground water was polluted by fertilization and compost while streamwater was polluted by loss of soil and organic during the rainy season. Principal chemical components related with changing water quality were EC, NO_3^-, Ca, Mg, Na, CI^-, SO_4^- in ground water, whereas NH_4-N, K, Mg, CI^-, SO_4^- in stream water.
서영진(Young-Jin Seo),연일권(Il-Kweon Yeon),신용습(Yong-Seub Shin),서동환(Dong-Whan Suh),최성용(Seong-Yong Choi),박소득(So-Deuk Park),장원철(Won-Cheol Jang),서전규(Jun-Kyu Suh) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.4
시설재배 참외재배시 적정 관비액 농도조성 결정을 위하여 질소, 인산, 칼리 3요인에 대한 참외 수량반응에 대하여 반응표면분석을 실시한 결과 최대 수량을 나타내는 관비액 농도는 질소 108.3㎎ L?¹, 인산 54.8 ㎎ L?¹, 칼리 158.3 ㎎ L?¹으로 조사되었고 참외의 최대수량은 2,966.8 ㎏ 10a?¹으로 분석되었다 관행재배에 비하여 관비재배시 인산흡수량 증가는 없었으나, 질소 관비처리시 관비재배 처리구에 비해 약 33.3%의 질소흡수량 증가가 있었으며 (p < 0.001), 칼리의 경우 관비처리구는 약 15.7%의 칼리흡수량 증가가 있었다 (p < 0.01). 참외의 수량도 관비재배 처리구에서 2,678 ± 75.50 ㎏ 10a?¹으로 관행처리구 2,177 ± 63.01 ㎏ 10a?¹보다 23% 정도 증수되었으며 (p<0.001), 관비처리와 관행처리간 토양화학성 차이는 없었다. Fertigation with drip irrigation provides effective and cost-efficient way to supply both nutrient and water to crop. However, inappropriate management of fertigation systems may cause inefficient nutrient and water use, thereby diminishing expected yield benefits as well as contributing to deterioration of soil properties. In this study, greenhouse experiments were conducted to investigate the optimal concentration of N, P and K fertigation solution for maximum production of oriental melon (Cucumis melo L.) using a response surface methodology, to evaluate an efficiency of nutrients uptake and an effect on soil chemical properties. Canonical analysis of response surface and contour plot interpretation revealed that 108.3 ㎎ L?¹ of nitrogen (N), 54.8 ㎎ L?¹ of phosphorous (P) and 158.3 ㎎ L?¹ of potassium (K) resulted in maximim yield of oriental melon (2,966 ㎏ 10a?¹). Compared to conventional practice, fertigation increased fruit yield up to 23.0% (p<0.001), uptake of N and K by plant also up to 33.3% (p<0.001) and 15.7% (p<0.01), respectively. These results suggest that fertigation has the advantage of the increase in yield and fertilizer use efficiency.
서영진(Young-Jin Seo),박준홍(Jun-Hong Park),김찬용(Chan-Yong Kim),김종수(Jong-Su Kim),조두현(Doo-Hyun Cho),최성용(Seong-Yong Choi),박소득(So-Deuk Park),정현철(Hyun-Cheol Jung),이덕배(Deog-Bae Lee),김광섭(Kwang-Seop Kim),박만(Man Par 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
논토양 종류가 메탄배출에 미치는 영향을 구명하기 위하여 적황색토인 화동통과 회색토인 신흥통을 공시하여 벼 재배기간중 메탄배출량, 산화환원전위 및 토양중 산화물 함량을 분석하였다. 적황색토에서 메탄배출이 회색토에 비해 유의하게 낮았으며, 산화환원전위는 상대적으로 높았다. 적황색토는 회색토에 비해 쉽게 환원될 수 있는 Active oxide 함량은 낮은 반면, 상대적으로 안정성이 높은 Free oxide의 함량이 높았다. 따라서 논토양 종류별 메탄배출은 벼 재배기간중 산화환원전위와 토양중 Geothite, Hematite 등과 같은 메탄산화제의 함량에 영향을 받는 것으로 나타났다. Anaerobic decomposition of organic materials in flooded rice fields produces methane (CH4) gas, which escapes to the atmosphere primarily by transport through organs of the rice plants such as arenchyma etc., Although the annual amount of methane emitted from a given area is influenced by cultivation periods of rice and organic/inorganic amendments etc., soil type also affects methane emission from paddy soil during a rice cultivation. A field experiment was conducted to evaluate effects of soil type on CH4 emission in two paddy soils. One is a red-yellow soil classified as a Hwadong series (fine, mixed, mesic family of Aquic Hapludalfs), and the other is a gley soil classified as a Shinheung series (fine loamy, mixed, nonacid, mesic family of Aeric Fluvaquentic Endoaquepts). During a flooded periods, redox potentials of red-yellow soil were significantly higher than gley soil. CH4 emission in red-yellow soil (0.21 kg ha<SUP>-1</SUP> day<SUP>-1</SUP>) was lower than that in gley soil (5.25 kg ha<SUP>-1</SUP> day<SUP>-1</SUP>). In the condition of different soil types, CH4 emissions were mainly influenced by the content of total free metal oxides in paddy soil. The results strongly imply that iron- or manganese-oxides of well ordered crystalline forms in soil such as goethite and hematite influenced on a CH4 emission, which is crucial role as a CH4 oxidizers in paddy soil during a rice cultivation.
신장 조직 검사에서 사구체 면역침착을 보인 베게너 육아종증 1예
서영진 ( Young Jin Seo ),김윤정 ( Yoon Jung Kim ),문지미 ( Ji Mi Moon ),최혜윤 ( Hae Yoon Choi ),우진현 ( Jin Hyun Woo ),최성재 ( Seong Jae Choi ),이영호 ( Young Ho Lee ),지종대 ( Jong Dae Ji ),정운용 ( Woon Yong Jung ),송관규 ( G 대한신장학회 2009 Kidney Research and Clinical Practice Vol.28 No.6
Rapidly progressive glomerulonephritis (RPGN) in Wegener`s granulomatosis patients typically has been characterized by pauci-immune glomerulonephritis (PIGN). In some patients, however, significant amount of glomerular immune deposits was detected and reported that they may have poor prognosis. A 30 year-old-female visited due to the skin rash of both lower extremities, arthralgia and nasal stiffness. She had sinusitis, lung opacity, and proteinuria. Serologic PR-3 ANCA was positive and histologic findings of nasal cavity and lung also showed necrotizing vasculitis and granuloma. Thus we could diagnose Wegener`s granulomatosis. However, gross hematuria developed and renal function worsened in spite of treatment with high dose prednisolone and oral cyclophosphamide. Therefore we performed a kidney biopsy. The kidney biopsy showed crescentic glomerulonephritis with Ig A deposition in the mesangium. We experienced a case of Wegener`s granulomatosis patient with significant IgA deposition in glomeruli. We report this case with brief review of the literature.